1<?php
2//============================================================+
3// File name   : tcpdf_static.php
4// Version     : 1.1.4
5// Begin       : 2002-08-03
6// Last Update : 2019-11-01
7// Author      : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
8// License     : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
9// -------------------------------------------------------------------
10// Copyright (C) 2002-2021 Nicola Asuni - Tecnick.com LTD
11//
12// This file is part of TCPDF software library.
13//
14// TCPDF is free software: you can redistribute it and/or modify it
15// under the terms of the GNU Lesser General Public License as
16// published by the Free Software Foundation, either version 3 of the
17// License, or (at your option) any later version.
18//
19// TCPDF is distributed in the hope that it will be useful, but
20// WITHOUT ANY WARRANTY; without even the implied warranty of
21// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
22// See the GNU Lesser General Public License for more details.
23//
24// You should have received a copy of the License
25// along with TCPDF. If not, see
26// <http://www.tecnick.com/pagefiles/tcpdf/LICENSE.TXT>.
27//
28// See LICENSE.TXT file for more information.
29// -------------------------------------------------------------------
30//
31// Description :
32//   Static methods used by the TCPDF class.
33//
34//============================================================+
35
36/**
37 * @file
38 * This is a PHP class that contains static methods for the TCPDF class.<br>
39 * @package com.tecnick.tcpdf
40 * @author Nicola Asuni
41 * @version 1.1.2
42 */
43
44/**
45 * @class TCPDF_STATIC
46 * Static methods used by the TCPDF class.
47 * @package com.tecnick.tcpdf
48 * @brief PHP class for generating PDF documents without requiring external extensions.
49 * @version 1.1.1
50 * @author Nicola Asuni - info@tecnick.com
51 */
52class TCPDF_STATIC {
53
54	/**
55	 * Current TCPDF version.
56	 * @private static
57	 */
58	private static $tcpdf_version = '6.4.4';
59
60	/**
61	 * String alias for total number of pages.
62	 * @public static
63	 */
64	public static $alias_tot_pages = '{:ptp:}';
65
66	/**
67	 * String alias for page number.
68	 * @public static
69	 */
70	public static $alias_num_page = '{:pnp:}';
71
72	/**
73	 * String alias for total number of pages in a single group.
74	 * @public static
75	 */
76	public static $alias_group_tot_pages = '{:ptg:}';
77
78	/**
79	 * String alias for group page number.
80	 * @public static
81	 */
82	public static $alias_group_num_page = '{:png:}';
83
84	/**
85	 * String alias for right shift compensation used to correctly align page numbers on the right.
86	 * @public static
87	 */
88	public static $alias_right_shift = '{rsc:';
89
90	/**
91	 * Encryption padding string.
92	 * @public static
93	 */
94	public static $enc_padding = "\x28\xBF\x4E\x5E\x4E\x75\x8A\x41\x64\x00\x4E\x56\xFF\xFA\x01\x08\x2E\x2E\x00\xB6\xD0\x68\x3E\x80\x2F\x0C\xA9\xFE\x64\x53\x69\x7A";
95
96	/**
97	 * ByteRange placemark used during digital signature process.
98	 * @since 4.6.028 (2009-08-25)
99	 * @public static
100	 */
101	public static $byterange_string = '/ByteRange[0 ********** ********** **********]';
102
103	/**
104	 * Array page boxes names
105	 * @public static
106	 */
107	public static $pageboxes = array('MediaBox', 'CropBox', 'BleedBox', 'TrimBox', 'ArtBox');
108
109	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
110
111	/**
112	 * Return the current TCPDF version.
113	 * @return string TCPDF version string
114	 * @since 5.9.012 (2010-11-10)
115	 * @public static
116	 */
117	public static function getTCPDFVersion() {
118		return self::$tcpdf_version;
119	}
120
121	/**
122	 * Return the current TCPDF producer.
123	 * @return string TCPDF producer string
124	 * @since 6.0.000 (2013-03-16)
125	 * @public static
126	 */
127	public static function getTCPDFProducer() {
128		return "\x54\x43\x50\x44\x46\x20".self::getTCPDFVersion()."\x20\x28\x68\x74\x74\x70\x3a\x2f\x2f\x77\x77\x77\x2e\x74\x63\x70\x64\x66\x2e\x6f\x72\x67\x29";
129	}
130
131	/**
132	 * Sets the current active configuration setting of magic_quotes_runtime (if the set_magic_quotes_runtime function exist)
133	 * @param boolean $mqr FALSE for off, TRUE for on.
134	 * @since 4.6.025 (2009-08-17)
135	 * @public static
136	 */
137	public static function set_mqr($mqr) {
138		if (!defined('PHP_VERSION_ID')) {
139			$version = PHP_VERSION;
140			define('PHP_VERSION_ID', (($version[0] * 10000) + ($version[2] * 100) + $version[4]));
141		}
142		if (PHP_VERSION_ID < 50300) {
143			@set_magic_quotes_runtime($mqr);
144		}
145	}
146
147	/**
148	 * Gets the current active configuration setting of magic_quotes_runtime (if the get_magic_quotes_runtime function exist)
149	 * @return int Returns 0 if magic quotes runtime is off or get_magic_quotes_runtime doesn't exist, 1 otherwise.
150	 * @since 4.6.025 (2009-08-17)
151	 * @public static
152	 */
153	public static function get_mqr() {
154		if (!defined('PHP_VERSION_ID')) {
155			$version = PHP_VERSION;
156			define('PHP_VERSION_ID', (($version[0] * 10000) + ($version[2] * 100) + $version[4]));
157		}
158		if (PHP_VERSION_ID < 50300) {
159			return @get_magic_quotes_runtime();
160		}
161		return 0;
162	}
163
164	/**
165	 * Check if the URL exist.
166	 * @param string $url URL to check.
167	 * @return boolean true if the URl exist, false otherwise.
168	 * @since 5.9.204 (2013-01-28)
169	 * @public static
170	 */
171	public static function isValidURL($url) {
172		$headers = @get_headers($url);
173		if ($headers === false) {
174			return false;
175		}
176    	return (strpos($headers[0], '200') !== false);
177	}
178
179	/**
180	 * Removes SHY characters from text.
181	 * Unicode Data:<ul>
182	 * <li>Name : SOFT HYPHEN, commonly abbreviated as SHY</li>
183	 * <li>HTML Entity (decimal): "&amp;#173;"</li>
184	 * <li>HTML Entity (hex): "&amp;#xad;"</li>
185	 * <li>HTML Entity (named): "&amp;shy;"</li>
186	 * <li>How to type in Microsoft Windows: [Alt +00AD] or [Alt 0173]</li>
187	 * <li>UTF-8 (hex): 0xC2 0xAD (c2ad)</li>
188	 * <li>UTF-8 character: chr(194).chr(173)</li>
189	 * </ul>
190	 * @param string $txt input string
191	 * @param boolean $unicode True if we are in unicode mode, false otherwise.
192	 * @return string without SHY characters.
193	 * @since (4.5.019) 2009-02-28
194	 * @public static
195	 */
196	public static function removeSHY($txt='', $unicode=true) {
197		$txt = preg_replace('/([\\xc2]{1}[\\xad]{1})/', '', $txt);
198		if (!$unicode) {
199			$txt = preg_replace('/([\\xad]{1})/', '', $txt);
200		}
201		return $txt;
202	}
203
204
205	/**
206	 * Get the border mode accounting for multicell position (opens bottom side of multicell crossing pages)
207	 * @param string|array|int $brd Indicates if borders must be drawn around the cell block. The value can be a number:<ul><li>0: no border (default)</li><li>1: frame</li></ul>or a string containing some or all of the following characters (in any order):<ul><li>L: left</li><li>T: top</li><li>R: right</li><li>B: bottom</li></ul> or an array of line styles for each border group: array('LTRB' => array('width' => 2, 'cap' => 'butt', 'join' => 'miter', 'dash' => 0, 'color' => array(0, 0, 0)))
208	 * @param string $position multicell position: 'start', 'middle', 'end'
209	 * @param boolean $opencell True when the cell is left open at the page bottom, false otherwise.
210	 * @return array border mode array
211	 * @since 4.4.002 (2008-12-09)
212	 * @public static
213	 */
214	public static function getBorderMode($brd, $position='start', $opencell=true) {
215		if ((!$opencell) OR empty($brd)) {
216			return $brd;
217		}
218		if ($brd == 1) {
219			$brd = 'LTRB';
220		}
221		if (is_string($brd)) {
222			// convert string to array
223			$slen = strlen($brd);
224			$newbrd = array();
225			for ($i = 0; $i < $slen; ++$i) {
226				$newbrd[$brd[$i]] = array('cap' => 'square', 'join' => 'miter');
227			}
228			$brd = $newbrd;
229		}
230		foreach ($brd as $border => $style) {
231			switch ($position) {
232				case 'start': {
233					if (strpos($border, 'B') !== false) {
234						// remove bottom line
235						$newkey = str_replace('B', '', $border);
236						if (strlen($newkey) > 0) {
237							$brd[$newkey] = $style;
238						}
239						unset($brd[$border]);
240					}
241					break;
242				}
243				case 'middle': {
244					if (strpos($border, 'B') !== false) {
245						// remove bottom line
246						$newkey = str_replace('B', '', $border);
247						if (strlen($newkey) > 0) {
248							$brd[$newkey] = $style;
249						}
250						unset($brd[$border]);
251						$border = $newkey;
252					}
253					if (strpos($border, 'T') !== false) {
254						// remove bottom line
255						$newkey = str_replace('T', '', $border);
256						if (strlen($newkey) > 0) {
257							$brd[$newkey] = $style;
258						}
259						unset($brd[$border]);
260					}
261					break;
262				}
263				case 'end': {
264					if (strpos($border, 'T') !== false) {
265						// remove bottom line
266						$newkey = str_replace('T', '', $border);
267						if (strlen($newkey) > 0) {
268							$brd[$newkey] = $style;
269						}
270						unset($brd[$border]);
271					}
272					break;
273				}
274			}
275		}
276		return $brd;
277	}
278
279	/**
280	 * Determine whether a string is empty.
281	 * @param string $str string to be checked
282	 * @return bool true if string is empty
283	 * @since 4.5.044 (2009-04-16)
284	 * @public static
285	 */
286	public static function empty_string($str) {
287		return (is_null($str) OR (is_string($str) AND (strlen($str) == 0)));
288	}
289
290	/**
291	 * Returns a temporary filename for caching object on filesystem.
292	 * @param string $type Type of file (name of the subdir on the tcpdf cache folder).
293	 * @param string $file_id TCPDF file_id.
294	 * @return string filename.
295	 * @since 4.5.000 (2008-12-31)
296	 * @public static
297	 */
298	public static function getObjFilename($type='tmp', $file_id='') {
299		return tempnam(K_PATH_CACHE, '__tcpdf_'.$file_id.'_'.$type.'_'.md5(TCPDF_STATIC::getRandomSeed()).'_');
300	}
301
302	/**
303	 * Add "\" before "\", "(" and ")"
304	 * @param string $s string to escape.
305	 * @return string escaped string.
306	 * @public static
307	 */
308	public static function _escape($s) {
309		// the chr(13) substitution fixes the Bugs item #1421290.
310		return strtr($s, array(')' => '\\)', '(' => '\\(', '\\' => '\\\\', chr(13) => '\r'));
311	}
312
313	/**
314	* Escape some special characters (&lt; &gt; &amp;) for XML output.
315	* @param string $str Input string to convert.
316	* @return string converted string
317	* @since 5.9.121 (2011-09-28)
318	 * @public static
319	 */
320	public static function _escapeXML($str) {
321		$replaceTable = array("\0" => '', '&' => '&amp;', '<' => '&lt;', '>' => '&gt;');
322		$str = strtr($str, $replaceTable);
323		return $str;
324	}
325
326	/**
327	 * Creates a copy of a class object
328	 * @param object $object class object to be cloned
329	 * @return object cloned object
330	 * @since 4.5.029 (2009-03-19)
331	 * @public static
332	 */
333	public static function objclone($object) {
334		if (($object instanceof Imagick) AND (version_compare(phpversion('imagick'), '3.0.1') !== 1)) {
335			// on the versions after 3.0.1 the clone() method was deprecated in favour of clone keyword
336			return @$object->clone();
337		}
338		return @clone($object);
339	}
340
341	/**
342	 * Output input data and compress it if possible.
343	 * @param string $data Data to output.
344	 * @param int $length Data length in bytes.
345	 * @since 5.9.086
346	 * @public static
347	 */
348	public static function sendOutputData($data, $length) {
349		if (!isset($_SERVER['HTTP_ACCEPT_ENCODING']) OR empty($_SERVER['HTTP_ACCEPT_ENCODING'])) {
350			// the content length may vary if the server is using compression
351			header('Content-Length: '.$length);
352		}
353		echo $data;
354	}
355
356	/**
357	 * Replace page number aliases with number.
358	 * @param string $page Page content.
359	 * @param array $replace Array of replacements (array keys are replacement strings, values are alias arrays).
360	 * @param int $diff If passed, this will be set to the total char number difference between alias and replacements.
361	 * @return array replaced page content and updated $diff parameter as array.
362	 * @public static
363	 */
364	public static function replacePageNumAliases($page, $replace, $diff=0) {
365		foreach ($replace as $rep) {
366			foreach ($rep[3] as $a) {
367				if (strpos($page, $a) !== false) {
368					$page = str_replace($a, $rep[0], $page);
369					$diff += ($rep[2] - $rep[1]);
370				}
371			}
372		}
373		return array($page, $diff);
374	}
375
376	/**
377	 * Returns timestamp in seconds from formatted date-time.
378	 * @param string $date Formatted date-time.
379	 * @return int seconds.
380	 * @since 5.9.152 (2012-03-23)
381	 * @public static
382	 */
383	public static function getTimestamp($date) {
384		if (($date[0] == 'D') AND ($date[1] == ':')) {
385			// remove date prefix if present
386			$date = substr($date, 2);
387		}
388		return strtotime($date);
389	}
390
391	/**
392	 * Returns a formatted date-time.
393	 * @param int $time Time in seconds.
394	 * @return string escaped date string.
395	 * @since 5.9.152 (2012-03-23)
396	 * @public static
397	 */
398	public static function getFormattedDate($time) {
399		return substr_replace(date('YmdHisO', intval($time)), '\'', (0 - 2), 0).'\'';
400	}
401
402	/**
403	 * Returns a string containing random data to be used as a seed for encryption methods.
404	 * @param string $seed starting seed value
405	 * @return string containing random data
406	 * @author Nicola Asuni
407	 * @since 5.9.006 (2010-10-19)
408	 * @public static
409	 */
410	public static function getRandomSeed($seed='') {
411		$rnd = uniqid(rand().microtime(true), true);
412		if (function_exists('posix_getpid')) {
413			$rnd .= posix_getpid();
414		}
415		if (function_exists('openssl_random_pseudo_bytes') AND (strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN')) {
416			// this is not used on windows systems because it is very slow for a know bug
417			$rnd .= openssl_random_pseudo_bytes(512);
418		} else {
419			for ($i = 0; $i < 23; ++$i) {
420				$rnd .= uniqid('', true);
421			}
422		}
423		return $rnd.$seed.__FILE__.serialize($_SERVER).microtime(true);
424	}
425
426	/**
427	 * Encrypts a string using MD5 and returns it's value as a binary string.
428	 * @param string $str input string
429	 * @return string MD5 encrypted binary string
430	 * @since 2.0.000 (2008-01-02)
431	 * @public static
432	 */
433	public static function _md5_16($str) {
434		return pack('H*', md5($str));
435	}
436
437	/**
438	 * Returns the input text encrypted using AES algorithm and the specified key.
439	 * This method requires openssl or mcrypt. Text is padded to 16bytes blocks
440	 * @param string $key encryption key
441	 * @param string $text input text to be encrypted
442	 * @return string encrypted text
443	 * @author Nicola Asuni
444	 * @since 5.0.005 (2010-05-11)
445	 * @public static
446	 */
447	public static function _AES($key, $text) {
448		// padding (RFC 2898, PKCS #5: Password-Based Cryptography Specification Version 2.0)
449		$padding = 16 - (strlen($text) % 16);
450		$text .= str_repeat(chr($padding), $padding);
451		if (extension_loaded('openssl')) {
452			$algo = 'aes-256-cbc';
453			if (strlen($key) == 16) {
454				$algo = 'aes-128-cbc';
455			}
456			$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length($algo));
457			$text = openssl_encrypt($text, $algo, $key, OPENSSL_RAW_DATA, $iv);
458			return $iv.substr($text, 0, -16);
459		}
460		$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC), MCRYPT_RAND);
461		$text = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $text, MCRYPT_MODE_CBC, $iv);
462		$text = $iv.$text;
463		return $text;
464	}
465
466	/**
467	 * Returns the input text encrypted using AES algorithm and the specified key.
468	 * This method requires openssl or mcrypt. Text is not padded
469	 * @param string $key encryption key
470	 * @param string $text input text to be encrypted
471	 * @return string encrypted text
472	 * @author Nicola Asuni
473	 * @since TODO
474	 * @public static
475	 */
476	public static function _AESnopad($key, $text) {
477		if (extension_loaded('openssl')) {
478			$algo = 'aes-256-cbc';
479			if (strlen($key) == 16) {
480				$algo = 'aes-128-cbc';
481			}
482			$iv = str_repeat("\x00", openssl_cipher_iv_length($algo));
483			$text = openssl_encrypt($text, $algo, $key, OPENSSL_RAW_DATA, $iv);
484			return substr($text, 0, -16);
485		}
486		$iv = str_repeat("\x00", mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC));
487		$text = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $text, MCRYPT_MODE_CBC, $iv);
488		return $text;
489	}
490
491	/**
492	 * Returns the input text encrypted using RC4 algorithm and the specified key.
493	 * RC4 is the standard encryption algorithm used in PDF format
494	 * @param string $key Encryption key.
495	 * @param string $text Input text to be encrypted.
496	 * @param string $last_enc_key Reference to last RC4 key encrypted.
497	 * @param string $last_enc_key_c Reference to last RC4 computed key.
498	 * @return string encrypted text
499	 * @since 2.0.000 (2008-01-02)
500	 * @author Klemen Vodopivec, Nicola Asuni
501	 * @public static
502	 */
503	public static function _RC4($key, $text, &$last_enc_key, &$last_enc_key_c) {
504		if (function_exists('mcrypt_encrypt') AND ($out = @mcrypt_encrypt(MCRYPT_ARCFOUR, $key, $text, MCRYPT_MODE_STREAM, ''))) {
505			// try to use mcrypt function if exist
506			return $out;
507		}
508		if ($last_enc_key != $key) {
509			$k = str_repeat($key, (int) ((256 / strlen($key)) + 1));
510			$rc4 = range(0, 255);
511			$j = 0;
512			for ($i = 0; $i < 256; ++$i) {
513				$t = $rc4[$i];
514				$j = ($j + $t + ord($k[$i])) % 256;
515				$rc4[$i] = $rc4[$j];
516				$rc4[$j] = $t;
517			}
518			$last_enc_key = $key;
519			$last_enc_key_c = $rc4;
520		} else {
521			$rc4 = $last_enc_key_c;
522		}
523		$len = strlen($text);
524		$a = 0;
525		$b = 0;
526		$out = '';
527		for ($i = 0; $i < $len; ++$i) {
528			$a = ($a + 1) % 256;
529			$t = $rc4[$a];
530			$b = ($b + $t) % 256;
531			$rc4[$a] = $rc4[$b];
532			$rc4[$b] = $t;
533			$k = $rc4[($rc4[$a] + $rc4[$b]) % 256];
534			$out .= chr(ord($text[$i]) ^ $k);
535		}
536		return $out;
537	}
538
539	/**
540	 * Return the permission code used on encryption (P value).
541	 * @param array $permissions the set of permissions (specify the ones you want to block).
542	 * @param int $mode encryption strength: 0 = RC4 40 bit; 1 = RC4 128 bit; 2 = AES 128 bit; 3 = AES 256 bit.
543	 * @since 5.0.005 (2010-05-12)
544	 * @author Nicola Asuni
545	 * @public static
546	 */
547	public static function getUserPermissionCode($permissions, $mode=0) {
548		$options = array(
549			'owner' => 2, // bit 2 -- inverted logic: cleared by default
550			'print' => 4, // bit 3
551			'modify' => 8, // bit 4
552			'copy' => 16, // bit 5
553			'annot-forms' => 32, // bit 6
554			'fill-forms' => 256, // bit 9
555			'extract' => 512, // bit 10
556			'assemble' => 1024,// bit 11
557			'print-high' => 2048 // bit 12
558			);
559		$protection = 2147422012; // 32 bit: (01111111 11111111 00001111 00111100)
560		foreach ($permissions as $permission) {
561			if (isset($options[$permission])) {
562				if (($mode > 0) OR ($options[$permission] <= 32)) {
563					// set only valid permissions
564					if ($options[$permission] == 2) {
565						// the logic for bit 2 is inverted (cleared by default)
566						$protection += $options[$permission];
567					} else {
568						$protection -= $options[$permission];
569					}
570				}
571			}
572		}
573		return $protection;
574	}
575
576	/**
577	 * Convert hexadecimal string to string
578	 * @param string $bs byte-string to convert
579	 * @return string
580	 * @since 5.0.005 (2010-05-12)
581	 * @author Nicola Asuni
582	 * @public static
583	 */
584	public static function convertHexStringToString($bs) {
585		$string = ''; // string to be returned
586		$bslength = strlen($bs);
587		if (($bslength % 2) != 0) {
588			// padding
589			$bs .= '0';
590			++$bslength;
591		}
592		for ($i = 0; $i < $bslength; $i += 2) {
593			$string .= chr(hexdec($bs[$i].$bs[($i + 1)]));
594		}
595		return $string;
596	}
597
598	/**
599	 * Convert string to hexadecimal string (byte string)
600	 * @param string $s string to convert
601	 * @return string byte string
602	 * @since 5.0.010 (2010-05-17)
603	 * @author Nicola Asuni
604	 * @public static
605	 */
606	public static function convertStringToHexString($s) {
607		$bs = '';
608		$chars = preg_split('//', $s, -1, PREG_SPLIT_NO_EMPTY);
609		foreach ($chars as $c) {
610			$bs .= sprintf('%02s', dechex(ord($c)));
611		}
612		return $bs;
613	}
614
615	/**
616	 * Convert encryption P value to a string of bytes, low-order byte first.
617	 * @param string $protection 32bit encryption permission value (P value)
618	 * @return string
619	 * @since 5.0.005 (2010-05-12)
620	 * @author Nicola Asuni
621	 * @public static
622	 */
623	public static function getEncPermissionsString($protection) {
624		$binprot = sprintf('%032b', $protection);
625		$str = chr(bindec(substr($binprot, 24, 8)));
626		$str .= chr(bindec(substr($binprot, 16, 8)));
627		$str .= chr(bindec(substr($binprot, 8, 8)));
628		$str .= chr(bindec(substr($binprot, 0, 8)));
629		return $str;
630	}
631
632	/**
633	 * Encode a name object.
634	 * @param string $name Name object to encode.
635	 * @return string Encoded name object.
636	 * @author Nicola Asuni
637	 * @since 5.9.097 (2011-06-23)
638	 * @public static
639	 */
640	public static function encodeNameObject($name) {
641		$escname = '';
642		$length = strlen($name);
643		for ($i = 0; $i < $length; ++$i) {
644			$chr = $name[$i];
645			if (preg_match('/[0-9a-zA-Z#_=-]/', $chr) == 1) {
646				$escname .= $chr;
647			} else {
648				$escname .= sprintf('#%02X', ord($chr));
649			}
650		}
651		return $escname;
652	}
653
654	/**
655	 * Convert JavaScript form fields properties array to Annotation Properties array.
656	 * @param array $prop javascript field properties. Possible values are described on official Javascript for Acrobat API reference.
657	 * @param array $spot_colors Reference to spot colors array.
658	 * @param boolean $rtl True if in Right-To-Left text direction mode, false otherwise.
659	 * @return array of annotation properties
660	 * @author Nicola Asuni
661	 * @since 4.8.000 (2009-09-06)
662	 * @public static
663	 */
664	public static function getAnnotOptFromJSProp($prop, &$spot_colors, $rtl=false) {
665		if (isset($prop['aopt']) AND is_array($prop['aopt'])) {
666			// the annotation options are already defined
667			return $prop['aopt'];
668		}
669		$opt = array(); // value to be returned
670		// alignment: Controls how the text is laid out within the text field.
671		if (isset($prop['alignment'])) {
672			switch ($prop['alignment']) {
673				case 'left': {
674					$opt['q'] = 0;
675					break;
676				}
677				case 'center': {
678					$opt['q'] = 1;
679					break;
680				}
681				case 'right': {
682					$opt['q'] = 2;
683					break;
684				}
685				default: {
686					$opt['q'] = ($rtl)?2:0;
687					break;
688				}
689			}
690		}
691		// lineWidth: Specifies the thickness of the border when stroking the perimeter of a field's rectangle.
692		if (isset($prop['lineWidth'])) {
693			$linewidth = intval($prop['lineWidth']);
694		} else {
695			$linewidth = 1;
696		}
697		// borderStyle: The border style for a field.
698		if (isset($prop['borderStyle'])) {
699			switch ($prop['borderStyle']) {
700				case 'border.d':
701				case 'dashed': {
702					$opt['border'] = array(0, 0, $linewidth, array(3, 2));
703					$opt['bs'] = array('w'=>$linewidth, 's'=>'D', 'd'=>array(3, 2));
704					break;
705				}
706				case 'border.b':
707				case 'beveled': {
708					$opt['border'] = array(0, 0, $linewidth);
709					$opt['bs'] = array('w'=>$linewidth, 's'=>'B');
710					break;
711				}
712				case 'border.i':
713				case 'inset': {
714					$opt['border'] = array(0, 0, $linewidth);
715					$opt['bs'] = array('w'=>$linewidth, 's'=>'I');
716					break;
717				}
718				case 'border.u':
719				case 'underline': {
720					$opt['border'] = array(0, 0, $linewidth);
721					$opt['bs'] = array('w'=>$linewidth, 's'=>'U');
722					break;
723				}
724				case 'border.s':
725				case 'solid': {
726					$opt['border'] = array(0, 0, $linewidth);
727					$opt['bs'] = array('w'=>$linewidth, 's'=>'S');
728					break;
729				}
730				default: {
731					break;
732				}
733			}
734		}
735		if (isset($prop['border']) AND is_array($prop['border'])) {
736			$opt['border'] = $prop['border'];
737		}
738		if (!isset($opt['mk'])) {
739			$opt['mk'] = array();
740		}
741		if (!isset($opt['mk']['if'])) {
742			$opt['mk']['if'] = array();
743		}
744		$opt['mk']['if']['a'] = array(0.5, 0.5);
745		// buttonAlignX: Controls how space is distributed from the left of the button face with respect to the icon.
746		if (isset($prop['buttonAlignX'])) {
747			$opt['mk']['if']['a'][0] = $prop['buttonAlignX'];
748		}
749		// buttonAlignY: Controls how unused space is distributed from the bottom of the button face with respect to the icon.
750		if (isset($prop['buttonAlignY'])) {
751			$opt['mk']['if']['a'][1] = $prop['buttonAlignY'];
752		}
753		// buttonFitBounds: If true, the extent to which the icon may be scaled is set to the bounds of the button field.
754		if (isset($prop['buttonFitBounds']) AND ($prop['buttonFitBounds'] == 'true')) {
755			$opt['mk']['if']['fb'] = true;
756		}
757		// buttonScaleHow: Controls how the icon is scaled (if necessary) to fit inside the button face.
758		if (isset($prop['buttonScaleHow'])) {
759			switch ($prop['buttonScaleHow']) {
760				case 'scaleHow.proportional': {
761					$opt['mk']['if']['s'] = 'P';
762					break;
763				}
764				case 'scaleHow.anamorphic': {
765					$opt['mk']['if']['s'] = 'A';
766					break;
767				}
768			}
769		}
770		// buttonScaleWhen: Controls when an icon is scaled to fit inside the button face.
771		if (isset($prop['buttonScaleWhen'])) {
772			switch ($prop['buttonScaleWhen']) {
773				case 'scaleWhen.always': {
774					$opt['mk']['if']['sw'] = 'A';
775					break;
776				}
777				case 'scaleWhen.never': {
778					$opt['mk']['if']['sw'] = 'N';
779					break;
780				}
781				case 'scaleWhen.tooBig': {
782					$opt['mk']['if']['sw'] = 'B';
783					break;
784				}
785				case 'scaleWhen.tooSmall': {
786					$opt['mk']['if']['sw'] = 'S';
787					break;
788				}
789			}
790		}
791		// buttonPosition: Controls how the text and the icon of the button are positioned with respect to each other within the button face.
792		if (isset($prop['buttonPosition'])) {
793			switch ($prop['buttonPosition']) {
794				case 0:
795				case 'position.textOnly': {
796					$opt['mk']['tp'] = 0;
797					break;
798				}
799				case 1:
800				case 'position.iconOnly': {
801					$opt['mk']['tp'] = 1;
802					break;
803				}
804				case 2:
805				case 'position.iconTextV': {
806					$opt['mk']['tp'] = 2;
807					break;
808				}
809				case 3:
810				case 'position.textIconV': {
811					$opt['mk']['tp'] = 3;
812					break;
813				}
814				case 4:
815				case 'position.iconTextH': {
816					$opt['mk']['tp'] = 4;
817					break;
818				}
819				case 5:
820				case 'position.textIconH': {
821					$opt['mk']['tp'] = 5;
822					break;
823				}
824				case 6:
825				case 'position.overlay': {
826					$opt['mk']['tp'] = 6;
827					break;
828				}
829			}
830		}
831		// fillColor: Specifies the background color for a field.
832		if (isset($prop['fillColor'])) {
833			if (is_array($prop['fillColor'])) {
834				$opt['mk']['bg'] = $prop['fillColor'];
835			} else {
836				$opt['mk']['bg'] = TCPDF_COLORS::convertHTMLColorToDec($prop['fillColor'], $spot_colors);
837			}
838		}
839		// strokeColor: Specifies the stroke color for a field that is used to stroke the rectangle of the field with a line as large as the line width.
840		if (isset($prop['strokeColor'])) {
841			if (is_array($prop['strokeColor'])) {
842				$opt['mk']['bc'] = $prop['strokeColor'];
843			} else {
844				$opt['mk']['bc'] = TCPDF_COLORS::convertHTMLColorToDec($prop['strokeColor'], $spot_colors);
845			}
846		}
847		// rotation: The rotation of a widget in counterclockwise increments.
848		if (isset($prop['rotation'])) {
849			$opt['mk']['r'] = $prop['rotation'];
850		}
851		// charLimit: Limits the number of characters that a user can type into a text field.
852		if (isset($prop['charLimit'])) {
853			$opt['maxlen'] = intval($prop['charLimit']);
854		}
855		if (!isset($ff)) {
856			$ff = 0; // default value
857		}
858		// readonly: The read-only characteristic of a field. If a field is read-only, the user can see the field but cannot change it.
859		if (isset($prop['readonly']) AND ($prop['readonly'] == 'true')) {
860			$ff += 1 << 0;
861		}
862		// required: Specifies whether a field requires a value.
863		if (isset($prop['required']) AND ($prop['required'] == 'true')) {
864			$ff += 1 << 1;
865		}
866		// multiline: Controls how text is wrapped within the field.
867		if (isset($prop['multiline']) AND ($prop['multiline'] == 'true')) {
868			$ff += 1 << 12;
869		}
870		// password: Specifies whether the field should display asterisks when data is entered in the field.
871		if (isset($prop['password']) AND ($prop['password'] == 'true')) {
872			$ff += 1 << 13;
873		}
874		// NoToggleToOff: If set, exactly one radio button shall be selected at all times; selecting the currently selected button has no effect.
875		if (isset($prop['NoToggleToOff']) AND ($prop['NoToggleToOff'] == 'true')) {
876			$ff += 1 << 14;
877		}
878		// Radio: If set, the field is a set of radio buttons.
879		if (isset($prop['Radio']) AND ($prop['Radio'] == 'true')) {
880			$ff += 1 << 15;
881		}
882		// Pushbutton: If set, the field is a pushbutton that does not retain a permanent value.
883		if (isset($prop['Pushbutton']) AND ($prop['Pushbutton'] == 'true')) {
884			$ff += 1 << 16;
885		}
886		// Combo: If set, the field is a combo box; if clear, the field is a list box.
887		if (isset($prop['Combo']) AND ($prop['Combo'] == 'true')) {
888			$ff += 1 << 17;
889		}
890		// editable: Controls whether a combo box is editable.
891		if (isset($prop['editable']) AND ($prop['editable'] == 'true')) {
892			$ff += 1 << 18;
893		}
894		// Sort: If set, the field's option items shall be sorted alphabetically.
895		if (isset($prop['Sort']) AND ($prop['Sort'] == 'true')) {
896			$ff += 1 << 19;
897		}
898		// fileSelect: If true, sets the file-select flag in the Options tab of the text field (Field is Used for File Selection).
899		if (isset($prop['fileSelect']) AND ($prop['fileSelect'] == 'true')) {
900			$ff += 1 << 20;
901		}
902		// multipleSelection: If true, indicates that a list box allows a multiple selection of items.
903		if (isset($prop['multipleSelection']) AND ($prop['multipleSelection'] == 'true')) {
904			$ff += 1 << 21;
905		}
906		// doNotSpellCheck: If true, spell checking is not performed on this editable text field.
907		if (isset($prop['doNotSpellCheck']) AND ($prop['doNotSpellCheck'] == 'true')) {
908			$ff += 1 << 22;
909		}
910		// doNotScroll: If true, the text field does not scroll and the user, therefore, is limited by the rectangular region designed for the field.
911		if (isset($prop['doNotScroll']) AND ($prop['doNotScroll'] == 'true')) {
912			$ff += 1 << 23;
913		}
914		// comb: If set to true, the field background is drawn as series of boxes (one for each character in the value of the field) and each character of the content is drawn within those boxes. The number of boxes drawn is determined from the charLimit property. It applies only to text fields. The setter will also raise if any of the following field properties are also set multiline, password, and fileSelect. A side-effect of setting this property is that the doNotScroll property is also set.
915		if (isset($prop['comb']) AND ($prop['comb'] == 'true')) {
916			$ff += 1 << 24;
917		}
918		// radiosInUnison: If false, even if a group of radio buttons have the same name and export value, they behave in a mutually exclusive fashion, like HTML radio buttons.
919		if (isset($prop['radiosInUnison']) AND ($prop['radiosInUnison'] == 'true')) {
920			$ff += 1 << 25;
921		}
922		// richText: If true, the field allows rich text formatting.
923		if (isset($prop['richText']) AND ($prop['richText'] == 'true')) {
924			$ff += 1 << 25;
925		}
926		// commitOnSelChange: Controls whether a field value is committed after a selection change.
927		if (isset($prop['commitOnSelChange']) AND ($prop['commitOnSelChange'] == 'true')) {
928			$ff += 1 << 26;
929		}
930		$opt['ff'] = $ff;
931		// defaultValue: The default value of a field - that is, the value that the field is set to when the form is reset.
932		if (isset($prop['defaultValue'])) {
933			$opt['dv'] = $prop['defaultValue'];
934		}
935		$f = 4; // default value for annotation flags
936		// readonly: The read-only characteristic of a field. If a field is read-only, the user can see the field but cannot change it.
937		if (isset($prop['readonly']) AND ($prop['readonly'] == 'true')) {
938			$f += 1 << 6;
939		}
940		// display: Controls whether the field is hidden or visible on screen and in print.
941		if (isset($prop['display'])) {
942			if ($prop['display'] == 'display.visible') {
943				//
944			} elseif ($prop['display'] == 'display.hidden') {
945				$f += 1 << 1;
946			} elseif ($prop['display'] == 'display.noPrint') {
947				$f -= 1 << 2;
948			} elseif ($prop['display'] == 'display.noView') {
949				$f += 1 << 5;
950			}
951		}
952		$opt['f'] = $f;
953		// currentValueIndices: Reads and writes single or multiple values of a list box or combo box.
954		if (isset($prop['currentValueIndices']) AND is_array($prop['currentValueIndices'])) {
955			$opt['i'] = $prop['currentValueIndices'];
956		}
957		// value: The value of the field data that the user has entered.
958		if (isset($prop['value'])) {
959			if (is_array($prop['value'])) {
960				$opt['opt'] = array();
961				foreach ($prop['value'] AS $key => $optval) {
962					// exportValues: An array of strings representing the export values for the field.
963					if (isset($prop['exportValues'][$key])) {
964						$opt['opt'][$key] = array($prop['exportValues'][$key], $prop['value'][$key]);
965					} else {
966						$opt['opt'][$key] = $prop['value'][$key];
967					}
968				}
969			} else {
970				$opt['v'] = $prop['value'];
971			}
972		}
973		// richValue: This property specifies the text contents and formatting of a rich text field.
974		if (isset($prop['richValue'])) {
975			$opt['rv'] = $prop['richValue'];
976		}
977		// submitName: If nonempty, used during form submission instead of name. Only applicable if submitting in HTML format (that is, URL-encoded).
978		if (isset($prop['submitName'])) {
979			$opt['tm'] = $prop['submitName'];
980		}
981		// name: Fully qualified field name.
982		if (isset($prop['name'])) {
983			$opt['t'] = $prop['name'];
984		}
985		// userName: The user name (short description string) of the field.
986		if (isset($prop['userName'])) {
987			$opt['tu'] = $prop['userName'];
988		}
989		// highlight: Defines how a button reacts when a user clicks it.
990		if (isset($prop['highlight'])) {
991			switch ($prop['highlight']) {
992				case 'none':
993				case 'highlight.n': {
994					$opt['h'] = 'N';
995					break;
996				}
997				case 'invert':
998				case 'highlight.i': {
999					$opt['h'] = 'i';
1000					break;
1001				}
1002				case 'push':
1003				case 'highlight.p': {
1004					$opt['h'] = 'P';
1005					break;
1006				}
1007				case 'outline':
1008				case 'highlight.o': {
1009					$opt['h'] = 'O';
1010					break;
1011				}
1012			}
1013		}
1014		// Unsupported options:
1015		// - calcOrderIndex: Changes the calculation order of fields in the document.
1016		// - delay: Delays the redrawing of a field's appearance.
1017		// - defaultStyle: This property defines the default style attributes for the form field.
1018		// - style: Allows the user to set the glyph style of a check box or radio button.
1019		// - textColor, textFont, textSize
1020		return $opt;
1021	}
1022
1023	/**
1024	 * Format the page numbers.
1025	 * This method can be overridden for custom formats.
1026	 * @param int $num page number
1027	 * @return string
1028	 * @since 4.2.005 (2008-11-06)
1029	 * @public static
1030	 */
1031	public static function formatPageNumber($num) {
1032		return number_format((float)$num, 0, '', '.');
1033	}
1034
1035	/**
1036	 * Format the page numbers on the Table Of Content.
1037	 * This method can be overridden for custom formats.
1038	 * @param int $num page number
1039	 * @return string
1040	 * @since 4.5.001 (2009-01-04)
1041	 * @see addTOC(), addHTMLTOC()
1042	 * @public static
1043	 */
1044	public static function formatTOCPageNumber($num) {
1045		return number_format((float)$num, 0, '', '.');
1046	}
1047
1048	/**
1049	 * Extracts the CSS properties from a CSS string.
1050	 * @param string $cssdata string containing CSS definitions.
1051	 * @return array An array where the keys are the CSS selectors and the values are the CSS properties.
1052	 * @author Nicola Asuni
1053	 * @since 5.1.000 (2010-05-25)
1054	 * @public static
1055	 */
1056	public static function extractCSSproperties($cssdata) {
1057		if (empty($cssdata)) {
1058			return array();
1059		}
1060		// remove comments
1061		$cssdata = preg_replace('/\/\*[^\*]*\*\//', '', $cssdata);
1062		// remove newlines and multiple spaces
1063		$cssdata = preg_replace('/[\s]+/', ' ', $cssdata);
1064		// remove some spaces
1065		$cssdata = preg_replace('/[\s]*([;:\{\}]{1})[\s]*/', '\\1', $cssdata);
1066		// remove empty blocks
1067		$cssdata = preg_replace('/([^\}\{]+)\{\}/', '', $cssdata);
1068		// replace media type parenthesis
1069		$cssdata = preg_replace('/@media[\s]+([^\{]*)\{/i', '@media \\1§', $cssdata);
1070		$cssdata = preg_replace('/\}\}/si', '}§', $cssdata);
1071		// trim string
1072		$cssdata = trim($cssdata);
1073		// find media blocks (all, braille, embossed, handheld, print, projection, screen, speech, tty, tv)
1074		$cssblocks = array();
1075		$matches = array();
1076		if (preg_match_all('/@media[\s]+([^\§]*)§([^§]*)§/i', $cssdata, $matches) > 0) {
1077			foreach ($matches[1] as $key => $type) {
1078				$cssblocks[$type] = $matches[2][$key];
1079			}
1080			// remove media blocks
1081			$cssdata = preg_replace('/@media[\s]+([^\§]*)§([^§]*)§/i', '', $cssdata);
1082		}
1083		// keep 'all' and 'print' media, other media types are discarded
1084		if (isset($cssblocks['all']) AND !empty($cssblocks['all'])) {
1085			$cssdata .= $cssblocks['all'];
1086		}
1087		if (isset($cssblocks['print']) AND !empty($cssblocks['print'])) {
1088			$cssdata .= $cssblocks['print'];
1089		}
1090		// reset css blocks array
1091		$cssblocks = array();
1092		$matches = array();
1093		// explode css data string into array
1094		if (substr($cssdata, -1) == '}') {
1095			// remove last parethesis
1096			$cssdata = substr($cssdata, 0, -1);
1097		}
1098		$matches = explode('}', $cssdata);
1099		foreach ($matches as $key => $block) {
1100			// index 0 contains the CSS selector, index 1 contains CSS properties
1101			$cssblocks[$key] = explode('{', $block);
1102			if (!isset($cssblocks[$key][1])) {
1103				// remove empty definitions
1104				unset($cssblocks[$key]);
1105			}
1106		}
1107		// split groups of selectors (comma-separated list of selectors)
1108		foreach ($cssblocks as $key => $block) {
1109			if (strpos($block[0], ',') > 0) {
1110				$selectors = explode(',', $block[0]);
1111				foreach ($selectors as $sel) {
1112					$cssblocks[] = array(0 => trim($sel), 1 => $block[1]);
1113				}
1114				unset($cssblocks[$key]);
1115			}
1116		}
1117		// covert array to selector => properties
1118		$cssdata = array();
1119		foreach ($cssblocks as $block) {
1120			$selector = $block[0];
1121			// calculate selector's specificity
1122			$matches = array();
1123			$a = 0; // the declaration is not from is a 'style' attribute
1124			$b = intval(preg_match_all('/[\#]/', $selector, $matches)); // number of ID attributes
1125			$c = intval(preg_match_all('/[\[\.]/', $selector, $matches)); // number of other attributes
1126			$c += intval(preg_match_all('/[\:]link|visited|hover|active|focus|target|lang|enabled|disabled|checked|indeterminate|root|nth|first|last|only|empty|contains|not/i', $selector, $matches)); // number of pseudo-classes
1127			$d = intval(preg_match_all('/[\>\+\~\s]{1}[a-zA-Z0-9]+/', ' '.$selector, $matches)); // number of element names
1128			$d += intval(preg_match_all('/[\:][\:]/', $selector, $matches)); // number of pseudo-elements
1129			$specificity = $a.$b.$c.$d;
1130			// add specificity to the beginning of the selector
1131			$cssdata[$specificity.' '.$selector] = $block[1];
1132		}
1133		// sort selectors alphabetically to account for specificity
1134		ksort($cssdata, SORT_STRING);
1135		// return array
1136		return $cssdata;
1137	}
1138
1139	/**
1140	 * Cleanup HTML code (requires HTML Tidy library).
1141	 * @param string $html htmlcode to fix
1142	 * @param string $default_css CSS commands to add
1143	 * @param array|null $tagvs parameters for setHtmlVSpace method
1144	 * @param array|null $tidy_options options for tidy_parse_string function
1145	 * @param array $tagvspaces Array of vertical spaces for tags.
1146	 * @return string XHTML code cleaned up
1147	 * @author Nicola Asuni
1148	 * @since 5.9.017 (2010-11-16)
1149	 * @see setHtmlVSpace()
1150	 * @public static
1151	 */
1152	public static function fixHTMLCode($html, $default_css, $tagvs, $tidy_options, &$tagvspaces) {
1153		// configure parameters for HTML Tidy
1154		if (TCPDF_STATIC::empty_string($tidy_options)) {
1155			$tidy_options = array (
1156				'clean' => 1,
1157				'drop-empty-paras' => 0,
1158				'drop-proprietary-attributes' => 1,
1159				'fix-backslash' => 1,
1160				'hide-comments' => 1,
1161				'join-styles' => 1,
1162				'lower-literals' => 1,
1163				'merge-divs' => 1,
1164				'merge-spans' => 1,
1165				'output-xhtml' => 1,
1166				'word-2000' => 1,
1167				'wrap' => 0,
1168				'output-bom' => 0,
1169				//'char-encoding' => 'utf8',
1170				//'input-encoding' => 'utf8',
1171				//'output-encoding' => 'utf8'
1172			);
1173		}
1174		// clean up the HTML code
1175		$tidy = tidy_parse_string($html, $tidy_options);
1176		// fix the HTML
1177		$tidy->cleanRepair();
1178		// get the CSS part
1179		$tidy_head = tidy_get_head($tidy);
1180		$css = $tidy_head->value;
1181		$css = preg_replace('/<style([^>]+)>/ims', '<style>', $css);
1182		$css = preg_replace('/<\/style>(.*)<style>/ims', "\n", $css);
1183		$css = str_replace('/*<![CDATA[*/', '', $css);
1184		$css = str_replace('/*]]>*/', '', $css);
1185		preg_match('/<style>(.*)<\/style>/ims', $css, $matches);
1186		if (isset($matches[1])) {
1187			$css = strtolower($matches[1]);
1188		} else {
1189			$css = '';
1190		}
1191		// include default css
1192		$css = '<style>'.$default_css.$css.'</style>';
1193		// get the body part
1194		$tidy_body = tidy_get_body($tidy);
1195		$html = $tidy_body->value;
1196		// fix some self-closing tags
1197		$html = str_replace('<br>', '<br />', $html);
1198		// remove some empty tag blocks
1199		$html = preg_replace('/<div([^\>]*)><\/div>/', '', $html);
1200		$html = preg_replace('/<p([^\>]*)><\/p>/', '', $html);
1201		if (!TCPDF_STATIC::empty_string($tagvs)) {
1202			// set vertical space for some XHTML tags
1203			$tagvspaces = $tagvs;
1204		}
1205		// return the cleaned XHTML code + CSS
1206		return $css.$html;
1207	}
1208
1209	/**
1210	 * Returns true if the CSS selector is valid for the selected HTML tag
1211	 * @param array $dom array of HTML tags and properties
1212	 * @param int $key key of the current HTML tag
1213	 * @param string $selector CSS selector string
1214	 * @return true if the selector is valid, false otherwise
1215	 * @since 5.1.000 (2010-05-25)
1216	 * @public static
1217	 */
1218	public static function isValidCSSSelectorForTag($dom, $key, $selector) {
1219		$valid = false; // value to be returned
1220		$tag = $dom[$key]['value'];
1221		$class = array();
1222		if (isset($dom[$key]['attribute']['class']) AND !empty($dom[$key]['attribute']['class'])) {
1223			$class = explode(' ', strtolower($dom[$key]['attribute']['class']));
1224		}
1225		$id = '';
1226		if (isset($dom[$key]['attribute']['id']) AND !empty($dom[$key]['attribute']['id'])) {
1227			$id = strtolower($dom[$key]['attribute']['id']);
1228		}
1229		$selector = preg_replace('/([\>\+\~\s]{1})([\.]{1})([^\>\+\~\s]*)/si', '\\1*.\\3', $selector);
1230		$matches = array();
1231		if (preg_match_all('/([\>\+\~\s]{1})([a-zA-Z0-9\*]+)([^\>\+\~\s]*)/si', $selector, $matches, PREG_PATTERN_ORDER | PREG_OFFSET_CAPTURE) > 0) {
1232			$parentop = array_pop($matches[1]);
1233			$operator = $parentop[0];
1234			$offset = $parentop[1];
1235			$lasttag = array_pop($matches[2]);
1236			$lasttag = strtolower(trim($lasttag[0]));
1237			if (($lasttag == '*') OR ($lasttag == $tag)) {
1238				// the last element on selector is our tag or 'any tag'
1239				$attrib = array_pop($matches[3]);
1240				$attrib = strtolower(trim($attrib[0]));
1241				if (!empty($attrib)) {
1242					// check if matches class, id, attribute, pseudo-class or pseudo-element
1243					switch ($attrib[0]) {
1244						case '.': { // class
1245							if (in_array(substr($attrib, 1), $class)) {
1246								$valid = true;
1247							}
1248							break;
1249						}
1250						case '#': { // ID
1251							if (substr($attrib, 1) == $id) {
1252								$valid = true;
1253							}
1254							break;
1255						}
1256						case '[': { // attribute
1257							$attrmatch = array();
1258							if (preg_match('/\[([a-zA-Z0-9]*)[\s]*([\~\^\$\*\|\=]*)[\s]*["]?([^"\]]*)["]?\]/i', $attrib, $attrmatch) > 0) {
1259								$att = strtolower($attrmatch[1]);
1260								$val = $attrmatch[3];
1261								if (isset($dom[$key]['attribute'][$att])) {
1262									switch ($attrmatch[2]) {
1263										case '=': {
1264											if ($dom[$key]['attribute'][$att] == $val) {
1265												$valid = true;
1266											}
1267											break;
1268										}
1269										case '~=': {
1270											if (in_array($val, explode(' ', $dom[$key]['attribute'][$att]))) {
1271												$valid = true;
1272											}
1273											break;
1274										}
1275										case '^=': {
1276											if ($val == substr($dom[$key]['attribute'][$att], 0, strlen($val))) {
1277												$valid = true;
1278											}
1279											break;
1280										}
1281										case '$=': {
1282											if ($val == substr($dom[$key]['attribute'][$att], -strlen($val))) {
1283												$valid = true;
1284											}
1285											break;
1286										}
1287										case '*=': {
1288											if (strpos($dom[$key]['attribute'][$att], $val) !== false) {
1289												$valid = true;
1290											}
1291											break;
1292										}
1293										case '|=': {
1294											if ($dom[$key]['attribute'][$att] == $val) {
1295												$valid = true;
1296											} elseif (preg_match('/'.$val.'[\-]{1}/i', $dom[$key]['attribute'][$att]) > 0) {
1297												$valid = true;
1298											}
1299											break;
1300										}
1301										default: {
1302											$valid = true;
1303										}
1304									}
1305								}
1306							}
1307							break;
1308						}
1309						case ':': { // pseudo-class or pseudo-element
1310							if ($attrib[1] == ':') { // pseudo-element
1311								// pseudo-elements are not supported!
1312								// (::first-line, ::first-letter, ::before, ::after)
1313							} else { // pseudo-class
1314								// pseudo-classes are not supported!
1315								// (:root, :nth-child(n), :nth-last-child(n), :nth-of-type(n), :nth-last-of-type(n), :first-child, :last-child, :first-of-type, :last-of-type, :only-child, :only-of-type, :empty, :link, :visited, :active, :hover, :focus, :target, :lang(fr), :enabled, :disabled, :checked)
1316							}
1317							break;
1318						}
1319					} // end of switch
1320				} else {
1321					$valid = true;
1322				}
1323				if ($valid AND ($offset > 0)) {
1324					$valid = false;
1325					// check remaining selector part
1326					$selector = substr($selector, 0, $offset);
1327					switch ($operator) {
1328						case ' ': { // descendant of an element
1329							while ($dom[$key]['parent'] > 0) {
1330								if (self::isValidCSSSelectorForTag($dom, $dom[$key]['parent'], $selector)) {
1331									$valid = true;
1332									break;
1333								} else {
1334									$key = $dom[$key]['parent'];
1335								}
1336							}
1337							break;
1338						}
1339						case '>': { // child of an element
1340							$valid = self::isValidCSSSelectorForTag($dom, $dom[$key]['parent'], $selector);
1341							break;
1342						}
1343						case '+': { // immediately preceded by an element
1344							for ($i = ($key - 1); $i > $dom[$key]['parent']; --$i) {
1345								if ($dom[$i]['tag'] AND $dom[$i]['opening']) {
1346									$valid = self::isValidCSSSelectorForTag($dom, $i, $selector);
1347									break;
1348								}
1349							}
1350							break;
1351						}
1352						case '~': { // preceded by an element
1353							for ($i = ($key - 1); $i > $dom[$key]['parent']; --$i) {
1354								if ($dom[$i]['tag'] AND $dom[$i]['opening']) {
1355									if (self::isValidCSSSelectorForTag($dom, $i, $selector)) {
1356										break;
1357									}
1358								}
1359							}
1360							break;
1361						}
1362					}
1363				}
1364			}
1365		}
1366		return $valid;
1367	}
1368
1369	/**
1370	 * Returns the styles array that apply for the selected HTML tag.
1371	 * @param array $dom array of HTML tags and properties
1372	 * @param int $key key of the current HTML tag
1373	 * @param array $css array of CSS properties
1374	 * @return array containing CSS properties
1375	 * @since 5.1.000 (2010-05-25)
1376	 * @public static
1377	 */
1378	public static function getCSSdataArray($dom, $key, $css) {
1379		$cssarray = array(); // style to be returned
1380		// get parent CSS selectors
1381		$selectors = array();
1382		if (isset($dom[($dom[$key]['parent'])]['csssel'])) {
1383			$selectors = $dom[($dom[$key]['parent'])]['csssel'];
1384		}
1385		// get all styles that apply
1386		foreach($css as $selector => $style) {
1387			$pos = strpos($selector, ' ');
1388			// get specificity
1389			$specificity = substr($selector, 0, $pos);
1390			// remove specificity
1391			$selector = substr($selector, $pos);
1392			// check if this selector apply to current tag
1393			if (self::isValidCSSSelectorForTag($dom, $key, $selector)) {
1394				if (!in_array($selector, $selectors)) {
1395					// add style if not already added on parent selector
1396					$cssarray[] = array('k' => $selector, 's' => $specificity, 'c' => $style);
1397					$selectors[] = $selector;
1398				}
1399			}
1400		}
1401		if (isset($dom[$key]['attribute']['style'])) {
1402			// attach inline style (latest properties have high priority)
1403			$cssarray[] = array('k' => '', 's' => '1000', 'c' => $dom[$key]['attribute']['style']);
1404		}
1405		// order the css array to account for specificity
1406		$cssordered = array();
1407		foreach ($cssarray as $key => $val) {
1408			$skey = sprintf('%04d', $key);
1409			$cssordered[$val['s'].'_'.$skey] = $val;
1410		}
1411		// sort selectors alphabetically to account for specificity
1412		ksort($cssordered, SORT_STRING);
1413		return array($selectors, $cssordered);
1414	}
1415
1416	/**
1417	 * Compact CSS data array into single string.
1418	 * @param array $css array of CSS properties
1419	 * @return string containing merged CSS properties
1420	 * @since 5.9.070 (2011-04-19)
1421	 * @public static
1422	 */
1423	public static function getTagStyleFromCSSarray($css) {
1424		$tagstyle = ''; // value to be returned
1425		foreach ($css as $style) {
1426			// split single css commands
1427			$csscmds = explode(';', $style['c']);
1428			foreach ($csscmds as $cmd) {
1429				if (!empty($cmd)) {
1430					$pos = strpos($cmd, ':');
1431					if ($pos !== false) {
1432						$cmd = substr($cmd, 0, ($pos + 1));
1433						if (strpos($tagstyle, $cmd) !== false) {
1434							// remove duplicate commands (last commands have high priority)
1435							$tagstyle = preg_replace('/'.$cmd.'[^;]+/i', '', $tagstyle);
1436						}
1437					}
1438				}
1439			}
1440			$tagstyle .= ';'.$style['c'];
1441		}
1442		// remove multiple semicolons
1443		$tagstyle = preg_replace('/[;]+/', ';', $tagstyle);
1444		return $tagstyle;
1445	}
1446
1447	/**
1448	 * Returns the Roman representation of an integer number
1449	 * @param int $number number to convert
1450	 * @return string roman representation of the specified number
1451	 * @since 4.4.004 (2008-12-10)
1452	 * @public static
1453	 */
1454	public static function intToRoman($number) {
1455		$roman = '';
1456		if ($number >= 4000) {
1457			// do not represent numbers above 4000 in Roman numerals
1458			return strval($number);
1459		}
1460		while ($number >= 1000) {
1461			$roman .= 'M';
1462			$number -= 1000;
1463		}
1464		while ($number >= 900) {
1465			$roman .= 'CM';
1466			$number -= 900;
1467		}
1468		while ($number >= 500) {
1469			$roman .= 'D';
1470			$number -= 500;
1471		}
1472		while ($number >= 400) {
1473			$roman .= 'CD';
1474			$number -= 400;
1475		}
1476		while ($number >= 100) {
1477			$roman .= 'C';
1478			$number -= 100;
1479		}
1480		while ($number >= 90) {
1481			$roman .= 'XC';
1482			$number -= 90;
1483		}
1484		while ($number >= 50) {
1485			$roman .= 'L';
1486			$number -= 50;
1487		}
1488		while ($number >= 40) {
1489			$roman .= 'XL';
1490			$number -= 40;
1491		}
1492		while ($number >= 10) {
1493			$roman .= 'X';
1494			$number -= 10;
1495		}
1496		while ($number >= 9) {
1497			$roman .= 'IX';
1498			$number -= 9;
1499		}
1500		while ($number >= 5) {
1501			$roman .= 'V';
1502			$number -= 5;
1503		}
1504		while ($number >= 4) {
1505			$roman .= 'IV';
1506			$number -= 4;
1507		}
1508		while ($number >= 1) {
1509			$roman .= 'I';
1510			--$number;
1511		}
1512		return $roman;
1513	}
1514
1515	/**
1516	 * Find position of last occurrence of a substring in a string
1517	 * @param string $haystack The string to search in.
1518	 * @param string $needle substring to search.
1519	 * @param int $offset May be specified to begin searching an arbitrary number of characters into the string.
1520	 * @return int|false Returns the position where the needle exists. Returns FALSE if the needle was not found.
1521	 * @since 4.8.038 (2010-03-13)
1522	 * @public static
1523	 */
1524	public static function revstrpos($haystack, $needle, $offset = 0) {
1525		$length = strlen($haystack);
1526		$offset = ($offset > 0)?($length - $offset):abs($offset);
1527		$pos = strpos(strrev($haystack), strrev($needle), $offset);
1528		return ($pos === false)?false:($length - $pos - strlen($needle));
1529	}
1530
1531	/**
1532	 * Returns an array of hyphenation patterns.
1533	 * @param string $file TEX file containing hypenation patterns. TEX patterns can be downloaded from http://www.ctan.org/tex-archive/language/hyph-utf8/tex/generic/hyph-utf8/patterns/
1534	 * @return array of hyphenation patterns
1535	 * @author Nicola Asuni
1536	 * @since 4.9.012 (2010-04-12)
1537	 * @public static
1538	 */
1539	public static function getHyphenPatternsFromTEX($file) {
1540		// TEX patterns are available at:
1541		// http://www.ctan.org/tex-archive/language/hyph-utf8/tex/generic/hyph-utf8/patterns/
1542		$data = file_get_contents($file);
1543		$patterns = array();
1544		// remove comments
1545		$data = preg_replace('/\%[^\n]*/', '', $data);
1546		// extract the patterns part
1547		preg_match('/\\\\patterns\{([^\}]*)\}/i', $data, $matches);
1548		$data = trim(substr($matches[0], 10, -1));
1549		// extract each pattern
1550		$patterns_array = preg_split('/[\s]+/', $data);
1551		// create new language array of patterns
1552		$patterns = array();
1553		foreach($patterns_array as $val) {
1554			if (!TCPDF_STATIC::empty_string($val)) {
1555				$val = trim($val);
1556				$val = str_replace('\'', '\\\'', $val);
1557				$key = preg_replace('/[0-9]+/', '', $val);
1558				$patterns[$key] = $val;
1559			}
1560		}
1561		return $patterns;
1562	}
1563
1564	/**
1565	 * Get the Path-Painting Operators.
1566	 * @param string $style Style of rendering. Possible values are:
1567	 * <ul>
1568	 *   <li>S or D: Stroke the path.</li>
1569	 *   <li>s or d: Close and stroke the path.</li>
1570	 *   <li>f or F: Fill the path, using the nonzero winding number rule to determine the region to fill.</li>
1571	 *   <li>f* or F*: Fill the path, using the even-odd rule to determine the region to fill.</li>
1572	 *   <li>B or FD or DF: Fill and then stroke the path, using the nonzero winding number rule to determine the region to fill.</li>
1573	 *   <li>B* or F*D or DF*: Fill and then stroke the path, using the even-odd rule to determine the region to fill.</li>
1574	 *   <li>b or fd or df: Close, fill, and then stroke the path, using the nonzero winding number rule to determine the region to fill.</li>
1575	 *   <li>b or f*d or df*: Close, fill, and then stroke the path, using the even-odd rule to determine the region to fill.</li>
1576	 *   <li>CNZ: Clipping mode using the even-odd rule to determine which regions lie inside the clipping path.</li>
1577	 *   <li>CEO: Clipping mode using the nonzero winding number rule to determine which regions lie inside the clipping path</li>
1578	 *   <li>n: End the path object without filling or stroking it.</li>
1579	 * </ul>
1580	 * @param string $default default style
1581	 * @return string
1582	 * @author Nicola Asuni
1583	 * @since 5.0.000 (2010-04-30)
1584	 * @public static
1585	 */
1586	public static function getPathPaintOperator($style, $default='S') {
1587		$op = '';
1588		switch($style) {
1589			case 'S':
1590			case 'D': {
1591				$op = 'S';
1592				break;
1593			}
1594			case 's':
1595			case 'd': {
1596				$op = 's';
1597				break;
1598			}
1599			case 'f':
1600			case 'F': {
1601				$op = 'f';
1602				break;
1603			}
1604			case 'f*':
1605			case 'F*': {
1606				$op = 'f*';
1607				break;
1608			}
1609			case 'B':
1610			case 'FD':
1611			case 'DF': {
1612				$op = 'B';
1613				break;
1614			}
1615			case 'B*':
1616			case 'F*D':
1617			case 'DF*': {
1618				$op = 'B*';
1619				break;
1620			}
1621			case 'b':
1622			case 'fd':
1623			case 'df': {
1624				$op = 'b';
1625				break;
1626			}
1627			case 'b*':
1628			case 'f*d':
1629			case 'df*': {
1630				$op = 'b*';
1631				break;
1632			}
1633			case 'CNZ': {
1634				$op = 'W n';
1635				break;
1636			}
1637			case 'CEO': {
1638				$op = 'W* n';
1639				break;
1640			}
1641			case 'n': {
1642				$op = 'n';
1643				break;
1644			}
1645			default: {
1646				if (!empty($default)) {
1647					$op = self::getPathPaintOperator($default, '');
1648				} else {
1649					$op = '';
1650				}
1651			}
1652		}
1653		return $op;
1654	}
1655
1656	/**
1657	 * Get the product of two SVG tranformation matrices
1658	 * @param array $ta first SVG tranformation matrix
1659	 * @param array $tb second SVG tranformation matrix
1660	 * @return array transformation array
1661	 * @author Nicola Asuni
1662	 * @since 5.0.000 (2010-05-02)
1663	 * @public static
1664	 */
1665	public static function getTransformationMatrixProduct($ta, $tb) {
1666		$tm = array();
1667		$tm[0] = ($ta[0] * $tb[0]) + ($ta[2] * $tb[1]);
1668		$tm[1] = ($ta[1] * $tb[0]) + ($ta[3] * $tb[1]);
1669		$tm[2] = ($ta[0] * $tb[2]) + ($ta[2] * $tb[3]);
1670		$tm[3] = ($ta[1] * $tb[2]) + ($ta[3] * $tb[3]);
1671		$tm[4] = ($ta[0] * $tb[4]) + ($ta[2] * $tb[5]) + $ta[4];
1672		$tm[5] = ($ta[1] * $tb[4]) + ($ta[3] * $tb[5]) + $ta[5];
1673		return $tm;
1674	}
1675
1676	/**
1677	 * Get the tranformation matrix from SVG transform attribute
1678	 * @param string $attribute transformation
1679	 * @return array of transformations
1680	 * @author Nicola Asuni
1681	 * @since 5.0.000 (2010-05-02)
1682	 * @public static
1683	 */
1684	public static function getSVGTransformMatrix($attribute) {
1685		// identity matrix
1686		$tm = array(1, 0, 0, 1, 0, 0);
1687		$transform = array();
1688		if (preg_match_all('/(matrix|translate|scale|rotate|skewX|skewY)[\s]*\(([^\)]+)\)/si', $attribute, $transform, PREG_SET_ORDER) > 0) {
1689			foreach ($transform as $key => $data) {
1690				if (!empty($data[2])) {
1691					$a = 1;
1692					$b = 0;
1693					$c = 0;
1694					$d = 1;
1695					$e = 0;
1696					$f = 0;
1697					$regs = array();
1698					switch ($data[1]) {
1699						case 'matrix': {
1700							if (preg_match('/([a-z0-9\-\.]+)[\,\s]+([a-z0-9\-\.]+)[\,\s]+([a-z0-9\-\.]+)[\,\s]+([a-z0-9\-\.]+)[\,\s]+([a-z0-9\-\.]+)[\,\s]+([a-z0-9\-\.]+)/si', $data[2], $regs)) {
1701								$a = $regs[1];
1702								$b = $regs[2];
1703								$c = $regs[3];
1704								$d = $regs[4];
1705								$e = $regs[5];
1706								$f = $regs[6];
1707							}
1708							break;
1709						}
1710						case 'translate': {
1711							if (preg_match('/([a-z0-9\-\.]+)[\,\s]+([a-z0-9\-\.]+)/si', $data[2], $regs)) {
1712								$e = $regs[1];
1713								$f = $regs[2];
1714							} elseif (preg_match('/([a-z0-9\-\.]+)/si', $data[2], $regs)) {
1715								$e = $regs[1];
1716							}
1717							break;
1718						}
1719						case 'scale': {
1720							if (preg_match('/([a-z0-9\-\.]+)[\,\s]+([a-z0-9\-\.]+)/si', $data[2], $regs)) {
1721								$a = $regs[1];
1722								$d = $regs[2];
1723							} elseif (preg_match('/([a-z0-9\-\.]+)/si', $data[2], $regs)) {
1724								$a = $regs[1];
1725								$d = $a;
1726							}
1727							break;
1728						}
1729						case 'rotate': {
1730							if (preg_match('/([0-9\-\.]+)[\,\s]+([a-z0-9\-\.]+)[\,\s]+([a-z0-9\-\.]+)/si', $data[2], $regs)) {
1731								$ang = deg2rad($regs[1]);
1732								$x = $regs[2];
1733								$y = $regs[3];
1734								$a = cos($ang);
1735								$b = sin($ang);
1736								$c = -$b;
1737								$d = $a;
1738								$e = ($x * (1 - $a)) - ($y * $c);
1739								$f = ($y * (1 - $d)) - ($x * $b);
1740							} elseif (preg_match('/([0-9\-\.]+)/si', $data[2], $regs)) {
1741								$ang = deg2rad($regs[1]);
1742								$a = cos($ang);
1743								$b = sin($ang);
1744								$c = -$b;
1745								$d = $a;
1746								$e = 0;
1747								$f = 0;
1748							}
1749							break;
1750						}
1751						case 'skewX': {
1752							if (preg_match('/([0-9\-\.]+)/si', $data[2], $regs)) {
1753								$c = tan(deg2rad($regs[1]));
1754							}
1755							break;
1756						}
1757						case 'skewY': {
1758							if (preg_match('/([0-9\-\.]+)/si', $data[2], $regs)) {
1759								$b = tan(deg2rad($regs[1]));
1760							}
1761							break;
1762						}
1763					}
1764					$tm = self::getTransformationMatrixProduct($tm, array($a, $b, $c, $d, $e, $f));
1765				}
1766			}
1767		}
1768		return $tm;
1769	}
1770
1771	/**
1772	 * Returns the angle in radiants between two vectors
1773	 * @param int $x1 X coordinate of first vector point
1774	 * @param int $y1 Y coordinate of first vector point
1775	 * @param int $x2 X coordinate of second vector point
1776	 * @param int $y2 Y coordinate of second vector point
1777	 * @author Nicola Asuni
1778	 * @since 5.0.000 (2010-05-04)
1779	 * @public static
1780	 */
1781	public static function getVectorsAngle($x1, $y1, $x2, $y2) {
1782		$dprod = ($x1 * $x2) + ($y1 * $y2);
1783		$dist1 = sqrt(($x1 * $x1) + ($y1 * $y1));
1784		$dist2 = sqrt(($x2 * $x2) + ($y2 * $y2));
1785		$angle = acos($dprod / ($dist1 * $dist2));
1786		if (is_nan($angle)) {
1787			$angle = M_PI;
1788		}
1789		if ((($x1 * $y2) - ($x2 * $y1)) < 0) {
1790			$angle *= -1;
1791		}
1792		return $angle;
1793	}
1794
1795	/**
1796	 * Split string by a regular expression.
1797	 * This is a wrapper for the preg_split function to avoid the bug: https://bugs.php.net/bug.php?id=45850
1798	 * @param string $pattern The regular expression pattern to search for without the modifiers, as a string.
1799	 * @param string $modifiers The modifiers part of the pattern,
1800	 * @param string $subject The input string.
1801	 * @param int $limit If specified, then only substrings up to limit are returned with the rest of the string being placed in the last substring. A limit of -1, 0 or NULL means "no limit" and, as is standard across PHP, you can use NULL to skip to the flags parameter.
1802	 * @param int $flags The flags as specified on the preg_split PHP function.
1803	 * @return array Returns an array containing substrings of subject split along boundaries matched by pattern.modifier
1804	 * @author Nicola Asuni
1805	 * @since 6.0.023
1806	 * @public static
1807	 */
1808	public static function pregSplit($pattern, $modifiers, $subject, $limit=NULL, $flags=NULL) {
1809		// PHP 8.1 deprecates nulls for $limit and $flags
1810		$limit = $limit === null ? -1 : $limit;
1811		$flags = $flags === null ? 0 : $flags;
1812		// the bug only happens on PHP 5.2 when using the u modifier
1813		if ((strpos($modifiers, 'u') === FALSE) OR (count(preg_split('//u', "\n\t", -1, PREG_SPLIT_NO_EMPTY)) == 2)) {
1814			return preg_split($pattern.$modifiers, $subject, $limit, $flags);
1815		}
1816		// preg_split is bugged - try alternative solution
1817		$ret = array();
1818		while (($nl = strpos($subject, "\n")) !== FALSE) {
1819			$ret = array_merge($ret, preg_split($pattern.$modifiers, substr($subject, 0, $nl), $limit, $flags));
1820			$ret[] = "\n";
1821			$subject = substr($subject, ($nl + 1));
1822		}
1823		if (strlen($subject) > 0) {
1824			$ret = array_merge($ret, preg_split($pattern.$modifiers, $subject, $limit, $flags));
1825		}
1826		return $ret;
1827	}
1828
1829	/**
1830	 * Wrapper to use fopen only with local files
1831	 * @param string $filename Name of the file to open
1832	 * @param string $mode
1833	 * @return resource|false Returns a file pointer resource on success, or FALSE on error.
1834	 * @public static
1835	 */
1836	public static function fopenLocal($filename, $mode) {
1837		if (strpos($filename, '://') === false) {
1838			$filename = 'file://'.$filename;
1839		} elseif (stream_is_local($filename) !== true) {
1840			return false;
1841		}
1842		return fopen($filename, $mode);
1843	}
1844
1845	/**
1846	 * Check if the URL exist.
1847	 * @param string $url URL to check.
1848	 * @return bool Returns TRUE if the URL exists; FALSE otherwise.
1849	 * @public static
1850	 * @since 6.2.25
1851	 */
1852	public static function url_exists($url) {
1853		$crs = curl_init();
1854		// encode query params in URL to get right response form the server
1855		$url = self::encodeUrlQuery($url);
1856		curl_setopt($crs, CURLOPT_URL, $url);
1857		curl_setopt($crs, CURLOPT_NOBODY, true);
1858		curl_setopt($crs, CURLOPT_FAILONERROR, true);
1859		if ((ini_get('open_basedir') == '') && (!ini_get('safe_mode'))) {
1860			curl_setopt($crs, CURLOPT_FOLLOWLOCATION, true);
1861		}
1862		curl_setopt($crs, CURLOPT_CONNECTTIMEOUT, 5);
1863		curl_setopt($crs, CURLOPT_TIMEOUT, 30);
1864		curl_setopt($crs, CURLOPT_SSL_VERIFYPEER, false);
1865		curl_setopt($crs, CURLOPT_SSL_VERIFYHOST, false);
1866		curl_setopt($crs, CURLOPT_USERAGENT, 'tc-lib-file');
1867		curl_setopt($crs, CURLOPT_MAXREDIRS, 5);
1868		if (defined('CURLOPT_PROTOCOLS')) {
1869		    curl_setopt($crs, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS | CURLPROTO_HTTP |  CURLPROTO_FTP | CURLPROTO_FTPS);
1870		}
1871		curl_exec($crs);
1872		$code = curl_getinfo($crs, CURLINFO_HTTP_CODE);
1873		curl_close($crs);
1874		return ($code == 200);
1875	}
1876
1877	/**
1878	 * Encode query params in URL
1879	 *
1880	 * @param string $url
1881	 * @return string
1882	 * @since 6.3.3 (2019-11-01)
1883	 * @public static
1884	 */
1885	public static function encodeUrlQuery($url) {
1886		$urlData = parse_url($url);
1887		if (isset($urlData['query']) && $urlData['query']) {
1888			$urlQueryData = array();
1889			parse_str(urldecode($urlData['query']), $urlQueryData);
1890			$updatedUrl = $urlData['scheme'] . '://' . $urlData['host'] . $urlData['path'] . '?' . http_build_query($urlQueryData);
1891		} else {
1892			$updatedUrl = $url;
1893		}
1894		return $updatedUrl;
1895	}
1896
1897	/**
1898	 * Wrapper for file_exists.
1899	 * Checks whether a file or directory exists.
1900	 * Only allows some protocols and local files.
1901	 * @param string $filename Path to the file or directory.
1902	 * @return bool Returns TRUE if the file or directory specified by filename exists; FALSE otherwise.
1903	 * @public static
1904	 */
1905	public static function file_exists($filename) {
1906		if (preg_match('|^https?://|', $filename) == 1) {
1907			return self::url_exists($filename);
1908		}
1909		if (strpos($filename, '://')) {
1910			return false; // only support http and https wrappers for security reasons
1911		}
1912		return @file_exists($filename);
1913	}
1914
1915	/**
1916	 * Reads entire file into a string.
1917	 * The file can be also an URL.
1918	 * @param string $file Name of the file or URL to read.
1919	 * @return string|false The function returns the read data or FALSE on failure.
1920	 * @author Nicola Asuni
1921	 * @since 6.0.025
1922	 * @public static
1923	 */
1924	public static function fileGetContents($file) {
1925		$alt = array($file);
1926		//
1927		if ((strlen($file) > 1)
1928		    && ($file[0] === '/')
1929		    && ($file[1] !== '/')
1930		    && !empty($_SERVER['DOCUMENT_ROOT'])
1931		    && ($_SERVER['DOCUMENT_ROOT'] !== '/')
1932		) {
1933		    $findroot = strpos($file, $_SERVER['DOCUMENT_ROOT']);
1934		    if (($findroot === false) || ($findroot > 1)) {
1935			$alt[] = htmlspecialchars_decode(urldecode($_SERVER['DOCUMENT_ROOT'].$file));
1936		    }
1937		}
1938		//
1939		$protocol = 'http';
1940		if (!empty($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS']) != 'off')) {
1941		    $protocol .= 's';
1942		}
1943		//
1944		$url = $file;
1945		if (preg_match('%^//%', $url) && !empty($_SERVER['HTTP_HOST'])) {
1946			$url = $protocol.':'.str_replace(' ', '%20', $url);
1947		}
1948		$url = htmlspecialchars_decode($url);
1949		$alt[] = $url;
1950		//
1951		if (preg_match('%^(https?)://%', $url)
1952		    && empty($_SERVER['HTTP_HOST'])
1953		    && empty($_SERVER['DOCUMENT_ROOT'])
1954		) {
1955			$urldata = parse_url($url);
1956			if (empty($urldata['query'])) {
1957				$host = $protocol.'://'.$_SERVER['HTTP_HOST'];
1958				if (strpos($url, $host) === 0) {
1959				    // convert URL to full server path
1960				    $tmp = str_replace($host, $_SERVER['DOCUMENT_ROOT'], $url);
1961				    $alt[] = htmlspecialchars_decode(urldecode($tmp));
1962				}
1963			}
1964		}
1965		//
1966		if (isset($_SERVER['SCRIPT_URI'])
1967		    && !preg_match('%^(https?|ftp)://%', $file)
1968		    && !preg_match('%^//%', $file)
1969		) {
1970		    $urldata = @parse_url($_SERVER['SCRIPT_URI']);
1971		    $alt[] = $urldata['scheme'].'://'.$urldata['host'].(($file[0] == '/') ? '' : '/').$file;
1972		}
1973		//
1974		$alt = array_unique($alt);
1975		foreach ($alt as $path) {
1976			if (!self::file_exists($path)) {
1977				continue;
1978			}
1979			$ret = @file_get_contents($path);
1980			if ( $ret != false ) {
1981			    return $ret;
1982			}
1983			// try to use CURL for URLs
1984			if (!ini_get('allow_url_fopen')
1985				&& function_exists('curl_init')
1986				&& preg_match('%^(https?|ftp)://%', $path)
1987			) {
1988				// try to get remote file data using cURL
1989				$crs = curl_init();
1990				curl_setopt($crs, CURLOPT_URL, $path);
1991				curl_setopt($crs, CURLOPT_BINARYTRANSFER, true);
1992				curl_setopt($crs, CURLOPT_FAILONERROR, true);
1993				curl_setopt($crs, CURLOPT_RETURNTRANSFER, true);
1994				if ((ini_get('open_basedir') == '') && (!ini_get('safe_mode'))) {
1995				    curl_setopt($crs, CURLOPT_FOLLOWLOCATION, true);
1996				}
1997				curl_setopt($crs, CURLOPT_CONNECTTIMEOUT, 5);
1998				curl_setopt($crs, CURLOPT_TIMEOUT, 30);
1999				curl_setopt($crs, CURLOPT_SSL_VERIFYPEER, false);
2000				curl_setopt($crs, CURLOPT_SSL_VERIFYHOST, false);
2001				curl_setopt($crs, CURLOPT_USERAGENT, 'tc-lib-file');
2002				curl_setopt($crs, CURLOPT_MAXREDIRS, 5);
2003				if (defined('CURLOPT_PROTOCOLS')) {
2004				    curl_setopt($crs, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS | CURLPROTO_HTTP |  CURLPROTO_FTP | CURLPROTO_FTPS);
2005				}
2006				$ret = curl_exec($crs);
2007				curl_close($crs);
2008				if ($ret !== false) {
2009					return $ret;
2010				}
2011			}
2012		}
2013		return false;
2014	}
2015
2016	/**
2017	 * Get ULONG from string (Big Endian 32-bit unsigned integer).
2018	 * @param string $str string from where to extract value
2019	 * @param int $offset point from where to read the data
2020	 * @return int 32 bit value
2021	 * @author Nicola Asuni
2022	 * @since 5.2.000 (2010-06-02)
2023	 * @public static
2024	 */
2025	public static function _getULONG($str, $offset) {
2026		$v = unpack('Ni', substr($str, $offset, 4));
2027		return $v['i'];
2028	}
2029
2030	/**
2031	 * Get USHORT from string (Big Endian 16-bit unsigned integer).
2032	 * @param string $str string from where to extract value
2033	 * @param int $offset point from where to read the data
2034	 * @return int 16 bit value
2035	 * @author Nicola Asuni
2036	 * @since 5.2.000 (2010-06-02)
2037	 * @public static
2038	 */
2039	public static function _getUSHORT($str, $offset) {
2040		$v = unpack('ni', substr($str, $offset, 2));
2041		return $v['i'];
2042	}
2043
2044	/**
2045	 * Get SHORT from string (Big Endian 16-bit signed integer).
2046	 * @param string $str String from where to extract value.
2047	 * @param int $offset Point from where to read the data.
2048	 * @return int 16 bit value
2049	 * @author Nicola Asuni
2050	 * @since 5.2.000 (2010-06-02)
2051	 * @public static
2052	 */
2053	public static function _getSHORT($str, $offset) {
2054		$v = unpack('si', substr($str, $offset, 2));
2055		return $v['i'];
2056	}
2057
2058	/**
2059	 * Get FWORD from string (Big Endian 16-bit signed integer).
2060	 * @param string $str String from where to extract value.
2061	 * @param int $offset Point from where to read the data.
2062	 * @return int 16 bit value
2063	 * @author Nicola Asuni
2064	 * @since 5.9.123 (2011-09-30)
2065	 * @public static
2066	 */
2067	public static function _getFWORD($str, $offset) {
2068		$v = self::_getUSHORT($str, $offset);
2069		if ($v > 0x7fff) {
2070			$v -= 0x10000;
2071		}
2072		return $v;
2073	}
2074
2075	/**
2076	 * Get UFWORD from string (Big Endian 16-bit unsigned integer).
2077	 * @param string $str string from where to extract value
2078	 * @param int $offset point from where to read the data
2079	 * @return int 16 bit value
2080	 * @author Nicola Asuni
2081	 * @since 5.9.123 (2011-09-30)
2082	 * @public static
2083	 */
2084	public static function _getUFWORD($str, $offset) {
2085		$v = self::_getUSHORT($str, $offset);
2086		return $v;
2087	}
2088
2089	/**
2090	 * Get FIXED from string (32-bit signed fixed-point number (16.16).
2091	 * @param string $str string from where to extract value
2092	 * @param int $offset point from where to read the data
2093	 * @return int 16 bit value
2094	 * @author Nicola Asuni
2095	 * @since 5.9.123 (2011-09-30)
2096	 * @public static
2097	 */
2098	public static function _getFIXED($str, $offset) {
2099		// mantissa
2100		$m = self::_getFWORD($str, $offset);
2101		// fraction
2102		$f = self::_getUSHORT($str, ($offset + 2));
2103		$v = floatval(''.$m.'.'.$f.'');
2104		return $v;
2105	}
2106
2107	/**
2108	 * Get BYTE from string (8-bit unsigned integer).
2109	 * @param string $str String from where to extract value.
2110	 * @param int $offset Point from where to read the data.
2111	 * @return int 8 bit value
2112	 * @author Nicola Asuni
2113	 * @since 5.2.000 (2010-06-02)
2114	 * @public static
2115	 */
2116	public static function _getBYTE($str, $offset) {
2117		$v = unpack('Ci', substr($str, $offset, 1));
2118		return $v['i'];
2119	}
2120	/**
2121	 * Binary-safe and URL-safe file read.
2122	 * Reads up to length bytes from the file pointer referenced by handle. Reading stops as soon as one of the following conditions is met: length bytes have been read; EOF (end of file) is reached.
2123	 * @param resource $handle
2124	 * @param int $length
2125	 * @return string|false Returns the read string or FALSE in case of error.
2126	 * @author Nicola Asuni
2127	 * @since 4.5.027 (2009-03-16)
2128	 * @public static
2129	 */
2130	public static function rfread($handle, $length) {
2131		$data = fread($handle, $length);
2132		if ($data === false) {
2133			return false;
2134		}
2135		$rest = ($length - strlen($data));
2136		if (($rest > 0) && !feof($handle)) {
2137			$data .= self::rfread($handle, $rest);
2138		}
2139		return $data;
2140	}
2141
2142	/**
2143	 * Read a 4-byte (32 bit) integer from file.
2144	 * @param resource $f file resource.
2145	 * @return int 4-byte integer
2146	 * @public static
2147	 */
2148	public static function _freadint($f) {
2149		$a = unpack('Ni', fread($f, 4));
2150		return $a['i'];
2151	}
2152
2153	/**
2154	 * Array of page formats
2155	 * measures are calculated in this way: (inches * 72) or (millimeters * 72 / 25.4)
2156	 * @public static
2157	 *
2158     * @var array<string,float[]>
2159	 */
2160	public static $page_formats = array(
2161		// ISO 216 A Series + 2 SIS 014711 extensions
2162		'A0'                     => array( 2383.937,  3370.394), // = (  841 x 1189 ) mm  = ( 33.11 x 46.81 ) in
2163		'A1'                     => array( 1683.780,  2383.937), // = (  594 x 841  ) mm  = ( 23.39 x 33.11 ) in
2164		'A2'                     => array( 1190.551,  1683.780), // = (  420 x 594  ) mm  = ( 16.54 x 23.39 ) in
2165		'A3'                     => array(  841.890,  1190.551), // = (  297 x 420  ) mm  = ( 11.69 x 16.54 ) in
2166		'A4'                     => array(  595.276,   841.890), // = (  210 x 297  ) mm  = (  8.27 x 11.69 ) in
2167		'A5'                     => array(  419.528,   595.276), // = (  148 x 210  ) mm  = (  5.83 x 8.27  ) in
2168		'A6'                     => array(  297.638,   419.528), // = (  105 x 148  ) mm  = (  4.13 x 5.83  ) in
2169		'A7'                     => array(  209.764,   297.638), // = (   74 x 105  ) mm  = (  2.91 x 4.13  ) in
2170		'A8'                     => array(  147.402,   209.764), // = (   52 x 74   ) mm  = (  2.05 x 2.91  ) in
2171		'A9'                     => array(  104.882,   147.402), // = (   37 x 52   ) mm  = (  1.46 x 2.05  ) in
2172		'A10'                    => array(   73.701,   104.882), // = (   26 x 37   ) mm  = (  1.02 x 1.46  ) in
2173		'A11'                    => array(   51.024,    73.701), // = (   18 x 26   ) mm  = (  0.71 x 1.02  ) in
2174		'A12'                    => array(   36.850,    51.024), // = (   13 x 18   ) mm  = (  0.51 x 0.71  ) in
2175		// ISO 216 B Series + 2 SIS 014711 extensions
2176		'B0'                     => array( 2834.646,  4008.189), // = ( 1000 x 1414 ) mm  = ( 39.37 x 55.67 ) in
2177		'B1'                     => array( 2004.094,  2834.646), // = (  707 x 1000 ) mm  = ( 27.83 x 39.37 ) in
2178		'B2'                     => array( 1417.323,  2004.094), // = (  500 x 707  ) mm  = ( 19.69 x 27.83 ) in
2179		'B3'                     => array( 1000.630,  1417.323), // = (  353 x 500  ) mm  = ( 13.90 x 19.69 ) in
2180		'B4'                     => array(  708.661,  1000.630), // = (  250 x 353  ) mm  = (  9.84 x 13.90 ) in
2181		'B5'                     => array(  498.898,   708.661), // = (  176 x 250  ) mm  = (  6.93 x 9.84  ) in
2182		'B6'                     => array(  354.331,   498.898), // = (  125 x 176  ) mm  = (  4.92 x 6.93  ) in
2183		'B7'                     => array(  249.449,   354.331), // = (   88 x 125  ) mm  = (  3.46 x 4.92  ) in
2184		'B8'                     => array(  175.748,   249.449), // = (   62 x 88   ) mm  = (  2.44 x 3.46  ) in
2185		'B9'                     => array(  124.724,   175.748), // = (   44 x 62   ) mm  = (  1.73 x 2.44  ) in
2186		'B10'                    => array(   87.874,   124.724), // = (   31 x 44   ) mm  = (  1.22 x 1.73  ) in
2187		'B11'                    => array(   62.362,    87.874), // = (   22 x 31   ) mm  = (  0.87 x 1.22  ) in
2188		'B12'                    => array(   42.520,    62.362), // = (   15 x 22   ) mm  = (  0.59 x 0.87  ) in
2189		// ISO 216 C Series + 2 SIS 014711 extensions + 5 EXTENSION
2190		'C0'                     => array( 2599.370,  3676.535), // = (  917 x 1297 ) mm  = ( 36.10 x 51.06 ) in
2191		'C1'                     => array( 1836.850,  2599.370), // = (  648 x 917  ) mm  = ( 25.51 x 36.10 ) in
2192		'C2'                     => array( 1298.268,  1836.850), // = (  458 x 648  ) mm  = ( 18.03 x 25.51 ) in
2193		'C3'                     => array(  918.425,  1298.268), // = (  324 x 458  ) mm  = ( 12.76 x 18.03 ) in
2194		'C4'                     => array(  649.134,   918.425), // = (  229 x 324  ) mm  = (  9.02 x 12.76 ) in
2195		'C5'                     => array(  459.213,   649.134), // = (  162 x 229  ) mm  = (  6.38 x 9.02  ) in
2196		'C6'                     => array(  323.150,   459.213), // = (  114 x 162  ) mm  = (  4.49 x 6.38  ) in
2197		'C7'                     => array(  229.606,   323.150), // = (   81 x 114  ) mm  = (  3.19 x 4.49  ) in
2198		'C8'                     => array(  161.575,   229.606), // = (   57 x 81   ) mm  = (  2.24 x 3.19  ) in
2199		'C9'                     => array(  113.386,   161.575), // = (   40 x 57   ) mm  = (  1.57 x 2.24  ) in
2200		'C10'                    => array(   79.370,   113.386), // = (   28 x 40   ) mm  = (  1.10 x 1.57  ) in
2201		'C11'                    => array(   56.693,    79.370), // = (   20 x 28   ) mm  = (  0.79 x 1.10  ) in
2202		'C12'                    => array(   39.685,    56.693), // = (   14 x 20   ) mm  = (  0.55 x 0.79  ) in
2203		'C76'                    => array(  229.606,   459.213), // = (   81 x 162  ) mm  = (  3.19 x 6.38  ) in
2204		'DL'                     => array(  311.811,   623.622), // = (  110 x 220  ) mm  = (  4.33 x 8.66  ) in
2205		'DLE'                    => array(  323.150,   637.795), // = (  114 x 225  ) mm  = (  4.49 x 8.86  ) in
2206		'DLX'                    => array(  340.158,   666.142), // = (  120 x 235  ) mm  = (  4.72 x 9.25  ) in
2207		'DLP'                    => array(  280.630,   595.276), // = (   99 x 210  ) mm  = (  3.90 x 8.27  ) in (1/3 A4)
2208		// SIS 014711 E Series
2209		'E0'                     => array( 2491.654,  3517.795), // = (  879 x 1241 ) mm  = ( 34.61 x 48.86 ) in
2210		'E1'                     => array( 1757.480,  2491.654), // = (  620 x 879  ) mm  = ( 24.41 x 34.61 ) in
2211		'E2'                     => array( 1247.244,  1757.480), // = (  440 x 620  ) mm  = ( 17.32 x 24.41 ) in
2212		'E3'                     => array(  878.740,  1247.244), // = (  310 x 440  ) mm  = ( 12.20 x 17.32 ) in
2213		'E4'                     => array(  623.622,   878.740), // = (  220 x 310  ) mm  = (  8.66 x 12.20 ) in
2214		'E5'                     => array(  439.370,   623.622), // = (  155 x 220  ) mm  = (  6.10 x 8.66  ) in
2215		'E6'                     => array(  311.811,   439.370), // = (  110 x 155  ) mm  = (  4.33 x 6.10  ) in
2216		'E7'                     => array(  221.102,   311.811), // = (   78 x 110  ) mm  = (  3.07 x 4.33  ) in
2217		'E8'                     => array(  155.906,   221.102), // = (   55 x 78   ) mm  = (  2.17 x 3.07  ) in
2218		'E9'                     => array(  110.551,   155.906), // = (   39 x 55   ) mm  = (  1.54 x 2.17  ) in
2219		'E10'                    => array(   76.535,   110.551), // = (   27 x 39   ) mm  = (  1.06 x 1.54  ) in
2220		'E11'                    => array(   53.858,    76.535), // = (   19 x 27   ) mm  = (  0.75 x 1.06  ) in
2221		'E12'                    => array(   36.850,    53.858), // = (   13 x 19   ) mm  = (  0.51 x 0.75  ) in
2222		// SIS 014711 G Series
2223		'G0'                     => array( 2715.591,  3838.110), // = (  958 x 1354 ) mm  = ( 37.72 x 53.31 ) in
2224		'G1'                     => array( 1919.055,  2715.591), // = (  677 x 958  ) mm  = ( 26.65 x 37.72 ) in
2225		'G2'                     => array( 1357.795,  1919.055), // = (  479 x 677  ) mm  = ( 18.86 x 26.65 ) in
2226		'G3'                     => array(  958.110,  1357.795), // = (  338 x 479  ) mm  = ( 13.31 x 18.86 ) in
2227		'G4'                     => array(  677.480,   958.110), // = (  239 x 338  ) mm  = (  9.41 x 13.31 ) in
2228		'G5'                     => array(  479.055,   677.480), // = (  169 x 239  ) mm  = (  6.65 x 9.41  ) in
2229		'G6'                     => array(  337.323,   479.055), // = (  119 x 169  ) mm  = (  4.69 x 6.65  ) in
2230		'G7'                     => array(  238.110,   337.323), // = (   84 x 119  ) mm  = (  3.31 x 4.69  ) in
2231		'G8'                     => array(  167.244,   238.110), // = (   59 x 84   ) mm  = (  2.32 x 3.31  ) in
2232		'G9'                     => array(  119.055,   167.244), // = (   42 x 59   ) mm  = (  1.65 x 2.32  ) in
2233		'G10'                    => array(   82.205,   119.055), // = (   29 x 42   ) mm  = (  1.14 x 1.65  ) in
2234		'G11'                    => array(   59.528,    82.205), // = (   21 x 29   ) mm  = (  0.83 x 1.14  ) in
2235		'G12'                    => array(   39.685,    59.528), // = (   14 x 21   ) mm  = (  0.55 x 0.83  ) in
2236		// ISO Press
2237		'RA0'                    => array( 2437.795,  3458.268), // = (  860 x 1220 ) mm  = ( 33.86 x 48.03 ) in
2238		'RA1'                    => array( 1729.134,  2437.795), // = (  610 x 860  ) mm  = ( 24.02 x 33.86 ) in
2239		'RA2'                    => array( 1218.898,  1729.134), // = (  430 x 610  ) mm  = ( 16.93 x 24.02 ) in
2240		'RA3'                    => array(  864.567,  1218.898), // = (  305 x 430  ) mm  = ( 12.01 x 16.93 ) in
2241		'RA4'                    => array(  609.449,   864.567), // = (  215 x 305  ) mm  = (  8.46 x 12.01 ) in
2242		'SRA0'                   => array( 2551.181,  3628.346), // = (  900 x 1280 ) mm  = ( 35.43 x 50.39 ) in
2243		'SRA1'                   => array( 1814.173,  2551.181), // = (  640 x 900  ) mm  = ( 25.20 x 35.43 ) in
2244		'SRA2'                   => array( 1275.591,  1814.173), // = (  450 x 640  ) mm  = ( 17.72 x 25.20 ) in
2245		'SRA3'                   => array(  907.087,  1275.591), // = (  320 x 450  ) mm  = ( 12.60 x 17.72 ) in
2246		'SRA4'                   => array(  637.795,   907.087), // = (  225 x 320  ) mm  = (  8.86 x 12.60 ) in
2247		// German DIN 476
2248		'4A0'                    => array( 4767.874,  6740.787), // = ( 1682 x 2378 ) mm  = ( 66.22 x 93.62 ) in
2249		'2A0'                    => array( 3370.394,  4767.874), // = ( 1189 x 1682 ) mm  = ( 46.81 x 66.22 ) in
2250		// Variations on the ISO Standard
2251		'A2_EXTRA'               => array( 1261.417,  1754.646), // = (  445 x 619  ) mm  = ( 17.52 x 24.37 ) in
2252		'A3+'                    => array(  932.598,  1369.134), // = (  329 x 483  ) mm  = ( 12.95 x 19.02 ) in
2253		'A3_EXTRA'               => array(  912.756,  1261.417), // = (  322 x 445  ) mm  = ( 12.68 x 17.52 ) in
2254		'A3_SUPER'               => array(  864.567,  1440.000), // = (  305 x 508  ) mm  = ( 12.01 x 20.00 ) in
2255		'SUPER_A3'               => array(  864.567,  1380.472), // = (  305 x 487  ) mm  = ( 12.01 x 19.17 ) in
2256		'A4_EXTRA'               => array(  666.142,   912.756), // = (  235 x 322  ) mm  = (  9.25 x 12.68 ) in
2257		'A4_SUPER'               => array(  649.134,   912.756), // = (  229 x 322  ) mm  = (  9.02 x 12.68 ) in
2258		'SUPER_A4'               => array(  643.465,  1009.134), // = (  227 x 356  ) mm  = (  8.94 x 14.02 ) in
2259		'A4_LONG'                => array(  595.276,   986.457), // = (  210 x 348  ) mm  = (  8.27 x 13.70 ) in
2260		'F4'                     => array(  595.276,   935.433), // = (  210 x 330  ) mm  = (  8.27 x 12.99 ) in
2261		'SO_B5_EXTRA'            => array(  572.598,   782.362), // = (  202 x 276  ) mm  = (  7.95 x 10.87 ) in
2262		'A5_EXTRA'               => array(  490.394,   666.142), // = (  173 x 235  ) mm  = (  6.81 x 9.25  ) in
2263		// ANSI Series
2264		'ANSI_E'                 => array( 2448.000,  3168.000), // = (  864 x 1118 ) mm  = ( 34.00 x 44.00 ) in
2265		'ANSI_D'                 => array( 1584.000,  2448.000), // = (  559 x 864  ) mm  = ( 22.00 x 34.00 ) in
2266		'ANSI_C'                 => array( 1224.000,  1584.000), // = (  432 x 559  ) mm  = ( 17.00 x 22.00 ) in
2267		'ANSI_B'                 => array(  792.000,  1224.000), // = (  279 x 432  ) mm  = ( 11.00 x 17.00 ) in
2268		'ANSI_A'                 => array(  612.000,   792.000), // = (  216 x 279  ) mm  = (  8.50 x 11.00 ) in
2269		// Traditional 'Loose' North American Paper Sizes
2270		'USLEDGER'               => array( 1224.000,   792.000), // = (  432 x 279  ) mm  = ( 17.00 x 11.00 ) in
2271		'LEDGER'                 => array( 1224.000,   792.000), // = (  432 x 279  ) mm  = ( 17.00 x 11.00 ) in
2272		'ORGANIZERK'             => array(  792.000,  1224.000), // = (  279 x 432  ) mm  = ( 11.00 x 17.00 ) in
2273		'BIBLE'                  => array(  792.000,  1224.000), // = (  279 x 432  ) mm  = ( 11.00 x 17.00 ) in
2274		'USTABLOID'              => array(  792.000,  1224.000), // = (  279 x 432  ) mm  = ( 11.00 x 17.00 ) in
2275		'TABLOID'                => array(  792.000,  1224.000), // = (  279 x 432  ) mm  = ( 11.00 x 17.00 ) in
2276		'ORGANIZERM'             => array(  612.000,   792.000), // = (  216 x 279  ) mm  = (  8.50 x 11.00 ) in
2277		'USLETTER'               => array(  612.000,   792.000), // = (  216 x 279  ) mm  = (  8.50 x 11.00 ) in
2278		'LETTER'                 => array(  612.000,   792.000), // = (  216 x 279  ) mm  = (  8.50 x 11.00 ) in
2279		'USLEGAL'                => array(  612.000,  1008.000), // = (  216 x 356  ) mm  = (  8.50 x 14.00 ) in
2280		'LEGAL'                  => array(  612.000,  1008.000), // = (  216 x 356  ) mm  = (  8.50 x 14.00 ) in
2281		'GOVERNMENTLETTER'       => array(  576.000,   756.000), // = (  203 x 267  ) mm  = (  8.00 x 10.50 ) in
2282		'GLETTER'                => array(  576.000,   756.000), // = (  203 x 267  ) mm  = (  8.00 x 10.50 ) in
2283		'JUNIORLEGAL'            => array(  576.000,   360.000), // = (  203 x 127  ) mm  = (  8.00 x 5.00  ) in
2284		'JLEGAL'                 => array(  576.000,   360.000), // = (  203 x 127  ) mm  = (  8.00 x 5.00  ) in
2285		// Other North American Paper Sizes
2286		'QUADDEMY'               => array( 2520.000,  3240.000), // = (  889 x 1143 ) mm  = ( 35.00 x 45.00 ) in
2287		'SUPER_B'                => array(  936.000,  1368.000), // = (  330 x 483  ) mm  = ( 13.00 x 19.00 ) in
2288		'QUARTO'                 => array(  648.000,   792.000), // = (  229 x 279  ) mm  = (  9.00 x 11.00 ) in
2289		'GOVERNMENTLEGAL'        => array(  612.000,   936.000), // = (  216 x 330  ) mm  = (  8.50 x 13.00 ) in
2290		'FOLIO'                  => array(  612.000,   936.000), // = (  216 x 330  ) mm  = (  8.50 x 13.00 ) in
2291		'MONARCH'                => array(  522.000,   756.000), // = (  184 x 267  ) mm  = (  7.25 x 10.50 ) in
2292		'EXECUTIVE'              => array(  522.000,   756.000), // = (  184 x 267  ) mm  = (  7.25 x 10.50 ) in
2293		'ORGANIZERL'             => array(  396.000,   612.000), // = (  140 x 216  ) mm  = (  5.50 x 8.50  ) in
2294		'STATEMENT'              => array(  396.000,   612.000), // = (  140 x 216  ) mm  = (  5.50 x 8.50  ) in
2295		'MEMO'                   => array(  396.000,   612.000), // = (  140 x 216  ) mm  = (  5.50 x 8.50  ) in
2296		'FOOLSCAP'               => array(  595.440,   936.000), // = (  210 x 330  ) mm  = (  8.27 x 13.00 ) in
2297		'COMPACT'                => array(  306.000,   486.000), // = (  108 x 171  ) mm  = (  4.25 x 6.75  ) in
2298		'ORGANIZERJ'             => array(  198.000,   360.000), // = (   70 x 127  ) mm  = (  2.75 x 5.00  ) in
2299		// Canadian standard CAN 2-9.60M
2300		'P1'                     => array( 1587.402,  2437.795), // = (  560 x 860  ) mm  = ( 22.05 x 33.86 ) in
2301		'P2'                     => array( 1218.898,  1587.402), // = (  430 x 560  ) mm  = ( 16.93 x 22.05 ) in
2302		'P3'                     => array(  793.701,  1218.898), // = (  280 x 430  ) mm  = ( 11.02 x 16.93 ) in
2303		'P4'                     => array(  609.449,   793.701), // = (  215 x 280  ) mm  = (  8.46 x 11.02 ) in
2304		'P5'                     => array(  396.850,   609.449), // = (  140 x 215  ) mm  = (  5.51 x 8.46  ) in
2305		'P6'                     => array(  303.307,   396.850), // = (  107 x 140  ) mm  = (  4.21 x 5.51  ) in
2306		// North American Architectural Sizes
2307		'ARCH_E'                 => array( 2592.000,  3456.000), // = (  914 x 1219 ) mm  = ( 36.00 x 48.00 ) in
2308		'ARCH_E1'                => array( 2160.000,  3024.000), // = (  762 x 1067 ) mm  = ( 30.00 x 42.00 ) in
2309		'ARCH_D'                 => array( 1728.000,  2592.000), // = (  610 x 914  ) mm  = ( 24.00 x 36.00 ) in
2310		'BROADSHEET'             => array( 1296.000,  1728.000), // = (  457 x 610  ) mm  = ( 18.00 x 24.00 ) in
2311		'ARCH_C'                 => array( 1296.000,  1728.000), // = (  457 x 610  ) mm  = ( 18.00 x 24.00 ) in
2312		'ARCH_B'                 => array(  864.000,  1296.000), // = (  305 x 457  ) mm  = ( 12.00 x 18.00 ) in
2313		'ARCH_A'                 => array(  648.000,   864.000), // = (  229 x 305  ) mm  = (  9.00 x 12.00 ) in
2314		// -- North American Envelope Sizes
2315		// - Announcement Envelopes
2316		'ANNENV_A2'              => array(  314.640,   414.000), // = (  111 x 146  ) mm  = (  4.37 x 5.75  ) in
2317		'ANNENV_A6'              => array(  342.000,   468.000), // = (  121 x 165  ) mm  = (  4.75 x 6.50  ) in
2318		'ANNENV_A7'              => array(  378.000,   522.000), // = (  133 x 184  ) mm  = (  5.25 x 7.25  ) in
2319		'ANNENV_A8'              => array(  396.000,   584.640), // = (  140 x 206  ) mm  = (  5.50 x 8.12  ) in
2320		'ANNENV_A10'             => array(  450.000,   692.640), // = (  159 x 244  ) mm  = (  6.25 x 9.62  ) in
2321		'ANNENV_SLIM'            => array(  278.640,   638.640), // = (   98 x 225  ) mm  = (  3.87 x 8.87  ) in
2322		// - Commercial Envelopes
2323		'COMMENV_N6_1/4'         => array(  252.000,   432.000), // = (   89 x 152  ) mm  = (  3.50 x 6.00  ) in
2324		'COMMENV_N6_3/4'         => array(  260.640,   468.000), // = (   92 x 165  ) mm  = (  3.62 x 6.50  ) in
2325		'COMMENV_N8'             => array(  278.640,   540.000), // = (   98 x 191  ) mm  = (  3.87 x 7.50  ) in
2326		'COMMENV_N9'             => array(  278.640,   638.640), // = (   98 x 225  ) mm  = (  3.87 x 8.87  ) in
2327		'COMMENV_N10'            => array(  296.640,   684.000), // = (  105 x 241  ) mm  = (  4.12 x 9.50  ) in
2328		'COMMENV_N11'            => array(  324.000,   746.640), // = (  114 x 263  ) mm  = (  4.50 x 10.37 ) in
2329		'COMMENV_N12'            => array(  342.000,   792.000), // = (  121 x 279  ) mm  = (  4.75 x 11.00 ) in
2330		'COMMENV_N14'            => array(  360.000,   828.000), // = (  127 x 292  ) mm  = (  5.00 x 11.50 ) in
2331		// - Catalogue Envelopes
2332		'CATENV_N1'              => array(  432.000,   648.000), // = (  152 x 229  ) mm  = (  6.00 x 9.00  ) in
2333		'CATENV_N1_3/4'          => array(  468.000,   684.000), // = (  165 x 241  ) mm  = (  6.50 x 9.50  ) in
2334		'CATENV_N2'              => array(  468.000,   720.000), // = (  165 x 254  ) mm  = (  6.50 x 10.00 ) in
2335		'CATENV_N3'              => array(  504.000,   720.000), // = (  178 x 254  ) mm  = (  7.00 x 10.00 ) in
2336		'CATENV_N6'              => array(  540.000,   756.000), // = (  191 x 267  ) mm  = (  7.50 x 10.50 ) in
2337		'CATENV_N7'              => array(  576.000,   792.000), // = (  203 x 279  ) mm  = (  8.00 x 11.00 ) in
2338		'CATENV_N8'              => array(  594.000,   810.000), // = (  210 x 286  ) mm  = (  8.25 x 11.25 ) in
2339		'CATENV_N9_1/2'          => array(  612.000,   756.000), // = (  216 x 267  ) mm  = (  8.50 x 10.50 ) in
2340		'CATENV_N9_3/4'          => array(  630.000,   810.000), // = (  222 x 286  ) mm  = (  8.75 x 11.25 ) in
2341		'CATENV_N10_1/2'         => array(  648.000,   864.000), // = (  229 x 305  ) mm  = (  9.00 x 12.00 ) in
2342		'CATENV_N12_1/2'         => array(  684.000,   900.000), // = (  241 x 318  ) mm  = (  9.50 x 12.50 ) in
2343		'CATENV_N13_1/2'         => array(  720.000,   936.000), // = (  254 x 330  ) mm  = ( 10.00 x 13.00 ) in
2344		'CATENV_N14_1/4'         => array(  810.000,   882.000), // = (  286 x 311  ) mm  = ( 11.25 x 12.25 ) in
2345		'CATENV_N14_1/2'         => array(  828.000,  1044.000), // = (  292 x 368  ) mm  = ( 11.50 x 14.50 ) in
2346		// Japanese (JIS P 0138-61) Standard B-Series
2347		'JIS_B0'                 => array( 2919.685,  4127.244), // = ( 1030 x 1456 ) mm  = ( 40.55 x 57.32 ) in
2348		'JIS_B1'                 => array( 2063.622,  2919.685), // = (  728 x 1030 ) mm  = ( 28.66 x 40.55 ) in
2349		'JIS_B2'                 => array( 1459.843,  2063.622), // = (  515 x 728  ) mm  = ( 20.28 x 28.66 ) in
2350		'JIS_B3'                 => array( 1031.811,  1459.843), // = (  364 x 515  ) mm  = ( 14.33 x 20.28 ) in
2351		'JIS_B4'                 => array(  728.504,  1031.811), // = (  257 x 364  ) mm  = ( 10.12 x 14.33 ) in
2352		'JIS_B5'                 => array(  515.906,   728.504), // = (  182 x 257  ) mm  = (  7.17 x 10.12 ) in
2353		'JIS_B6'                 => array(  362.835,   515.906), // = (  128 x 182  ) mm  = (  5.04 x 7.17  ) in
2354		'JIS_B7'                 => array(  257.953,   362.835), // = (   91 x 128  ) mm  = (  3.58 x 5.04  ) in
2355		'JIS_B8'                 => array(  181.417,   257.953), // = (   64 x 91   ) mm  = (  2.52 x 3.58  ) in
2356		'JIS_B9'                 => array(  127.559,   181.417), // = (   45 x 64   ) mm  = (  1.77 x 2.52  ) in
2357		'JIS_B10'                => array(   90.709,   127.559), // = (   32 x 45   ) mm  = (  1.26 x 1.77  ) in
2358		'JIS_B11'                => array(   62.362,    90.709), // = (   22 x 32   ) mm  = (  0.87 x 1.26  ) in
2359		'JIS_B12'                => array(   45.354,    62.362), // = (   16 x 22   ) mm  = (  0.63 x 0.87  ) in
2360		// PA Series
2361		'PA0'                    => array( 2381.102,  3174.803), // = (  840 x 1120 ) mm  = ( 33.07 x 44.09 ) in
2362		'PA1'                    => array( 1587.402,  2381.102), // = (  560 x 840  ) mm  = ( 22.05 x 33.07 ) in
2363		'PA2'                    => array( 1190.551,  1587.402), // = (  420 x 560  ) mm  = ( 16.54 x 22.05 ) in
2364		'PA3'                    => array(  793.701,  1190.551), // = (  280 x 420  ) mm  = ( 11.02 x 16.54 ) in
2365		'PA4'                    => array(  595.276,   793.701), // = (  210 x 280  ) mm  = (  8.27 x 11.02 ) in
2366		'PA5'                    => array(  396.850,   595.276), // = (  140 x 210  ) mm  = (  5.51 x 8.27  ) in
2367		'PA6'                    => array(  297.638,   396.850), // = (  105 x 140  ) mm  = (  4.13 x 5.51  ) in
2368		'PA7'                    => array(  198.425,   297.638), // = (   70 x 105  ) mm  = (  2.76 x 4.13  ) in
2369		'PA8'                    => array(  147.402,   198.425), // = (   52 x 70   ) mm  = (  2.05 x 2.76  ) in
2370		'PA9'                    => array(   99.213,   147.402), // = (   35 x 52   ) mm  = (  1.38 x 2.05  ) in
2371		'PA10'                   => array(   73.701,    99.213), // = (   26 x 35   ) mm  = (  1.02 x 1.38  ) in
2372		// Standard Photographic Print Sizes
2373		'PASSPORT_PHOTO'         => array(   99.213,   127.559), // = (   35 x 45   ) mm  = (  1.38 x 1.77  ) in
2374		'E'                      => array(  233.858,   340.157), // = (   82 x 120  ) mm  = (  3.25 x 4.72  ) in
2375		'L'                      => array(  252.283,   360.000), // = (   89 x 127  ) mm  = (  3.50 x 5.00  ) in
2376		'3R'                     => array(  252.283,   360.000), // = (   89 x 127  ) mm  = (  3.50 x 5.00  ) in
2377		'KG'                     => array(  289.134,   430.866), // = (  102 x 152  ) mm  = (  4.02 x 5.98  ) in
2378		'4R'                     => array(  289.134,   430.866), // = (  102 x 152  ) mm  = (  4.02 x 5.98  ) in
2379		'4D'                     => array(  340.157,   430.866), // = (  120 x 152  ) mm  = (  4.72 x 5.98  ) in
2380		'2L'                     => array(  360.000,   504.567), // = (  127 x 178  ) mm  = (  5.00 x 7.01  ) in
2381		'5R'                     => array(  360.000,   504.567), // = (  127 x 178  ) mm  = (  5.00 x 7.01  ) in
2382		'8P'                     => array(  430.866,   575.433), // = (  152 x 203  ) mm  = (  5.98 x 7.99  ) in
2383		'6R'                     => array(  430.866,   575.433), // = (  152 x 203  ) mm  = (  5.98 x 7.99  ) in
2384		'6P'                     => array(  575.433,   720.000), // = (  203 x 254  ) mm  = (  7.99 x 10.00 ) in
2385		'8R'                     => array(  575.433,   720.000), // = (  203 x 254  ) mm  = (  7.99 x 10.00 ) in
2386		'6PW'                    => array(  575.433,   864.567), // = (  203 x 305  ) mm  = (  7.99 x 12.01 ) in
2387		'S8R'                    => array(  575.433,   864.567), // = (  203 x 305  ) mm  = (  7.99 x 12.01 ) in
2388		'4P'                     => array(  720.000,   864.567), // = (  254 x 305  ) mm  = ( 10.00 x 12.01 ) in
2389		'10R'                    => array(  720.000,   864.567), // = (  254 x 305  ) mm  = ( 10.00 x 12.01 ) in
2390		'4PW'                    => array(  720.000,  1080.000), // = (  254 x 381  ) mm  = ( 10.00 x 15.00 ) in
2391		'S10R'                   => array(  720.000,  1080.000), // = (  254 x 381  ) mm  = ( 10.00 x 15.00 ) in
2392		'11R'                    => array(  790.866,  1009.134), // = (  279 x 356  ) mm  = ( 10.98 x 14.02 ) in
2393		'S11R'                   => array(  790.866,  1224.567), // = (  279 x 432  ) mm  = ( 10.98 x 17.01 ) in
2394		'12R'                    => array(  864.567,  1080.000), // = (  305 x 381  ) mm  = ( 12.01 x 15.00 ) in
2395		'S12R'                   => array(  864.567,  1292.598), // = (  305 x 456  ) mm  = ( 12.01 x 17.95 ) in
2396		// Common Newspaper Sizes
2397		'NEWSPAPER_BROADSHEET'   => array( 2125.984,  1700.787), // = (  750 x 600  ) mm  = ( 29.53 x 23.62 ) in
2398		'NEWSPAPER_BERLINER'     => array( 1332.283,   892.913), // = (  470 x 315  ) mm  = ( 18.50 x 12.40 ) in
2399		'NEWSPAPER_TABLOID'      => array( 1218.898,   793.701), // = (  430 x 280  ) mm  = ( 16.93 x 11.02 ) in
2400		'NEWSPAPER_COMPACT'      => array( 1218.898,   793.701), // = (  430 x 280  ) mm  = ( 16.93 x 11.02 ) in
2401		// Business Cards
2402		'CREDIT_CARD'            => array(  153.014,   242.646), // = (   54 x 86   ) mm  = (  2.13 x 3.37  ) in
2403		'BUSINESS_CARD'          => array(  153.014,   242.646), // = (   54 x 86   ) mm  = (  2.13 x 3.37  ) in
2404		'BUSINESS_CARD_ISO7810'  => array(  153.014,   242.646), // = (   54 x 86   ) mm  = (  2.13 x 3.37  ) in
2405		'BUSINESS_CARD_ISO216'   => array(  147.402,   209.764), // = (   52 x 74   ) mm  = (  2.05 x 2.91  ) in
2406		'BUSINESS_CARD_IT'       => array(  155.906,   240.945), // = (   55 x 85   ) mm  = (  2.17 x 3.35  ) in
2407		'BUSINESS_CARD_UK'       => array(  155.906,   240.945), // = (   55 x 85   ) mm  = (  2.17 x 3.35  ) in
2408		'BUSINESS_CARD_FR'       => array(  155.906,   240.945), // = (   55 x 85   ) mm  = (  2.17 x 3.35  ) in
2409		'BUSINESS_CARD_DE'       => array(  155.906,   240.945), // = (   55 x 85   ) mm  = (  2.17 x 3.35  ) in
2410		'BUSINESS_CARD_ES'       => array(  155.906,   240.945), // = (   55 x 85   ) mm  = (  2.17 x 3.35  ) in
2411		'BUSINESS_CARD_CA'       => array(  144.567,   252.283), // = (   51 x 89   ) mm  = (  2.01 x 3.50  ) in
2412		'BUSINESS_CARD_US'       => array(  144.567,   252.283), // = (   51 x 89   ) mm  = (  2.01 x 3.50  ) in
2413		'BUSINESS_CARD_JP'       => array(  155.906,   257.953), // = (   55 x 91   ) mm  = (  2.17 x 3.58  ) in
2414		'BUSINESS_CARD_HK'       => array(  153.071,   255.118), // = (   54 x 90   ) mm  = (  2.13 x 3.54  ) in
2415		'BUSINESS_CARD_AU'       => array(  155.906,   255.118), // = (   55 x 90   ) mm  = (  2.17 x 3.54  ) in
2416		'BUSINESS_CARD_DK'       => array(  155.906,   255.118), // = (   55 x 90   ) mm  = (  2.17 x 3.54  ) in
2417		'BUSINESS_CARD_SE'       => array(  155.906,   255.118), // = (   55 x 90   ) mm  = (  2.17 x 3.54  ) in
2418		'BUSINESS_CARD_RU'       => array(  141.732,   255.118), // = (   50 x 90   ) mm  = (  1.97 x 3.54  ) in
2419		'BUSINESS_CARD_CZ'       => array(  141.732,   255.118), // = (   50 x 90   ) mm  = (  1.97 x 3.54  ) in
2420		'BUSINESS_CARD_FI'       => array(  141.732,   255.118), // = (   50 x 90   ) mm  = (  1.97 x 3.54  ) in
2421		'BUSINESS_CARD_HU'       => array(  141.732,   255.118), // = (   50 x 90   ) mm  = (  1.97 x 3.54  ) in
2422		'BUSINESS_CARD_IL'       => array(  141.732,   255.118), // = (   50 x 90   ) mm  = (  1.97 x 3.54  ) in
2423		// Billboards
2424		'4SHEET'                 => array( 2880.000,  4320.000), // = ( 1016 x 1524 ) mm  = ( 40.00 x 60.00 ) in
2425		'6SHEET'                 => array( 3401.575,  5102.362), // = ( 1200 x 1800 ) mm  = ( 47.24 x 70.87 ) in
2426		'12SHEET'                => array( 8640.000,  4320.000), // = ( 3048 x 1524 ) mm  = (120.00 x 60.00 ) in
2427		'16SHEET'                => array( 5760.000,  8640.000), // = ( 2032 x 3048 ) mm  = ( 80.00 x 120.00) in
2428		'32SHEET'                => array(11520.000,  8640.000), // = ( 4064 x 3048 ) mm  = (160.00 x 120.00) in
2429		'48SHEET'                => array(17280.000,  8640.000), // = ( 6096 x 3048 ) mm  = (240.00 x 120.00) in
2430		'64SHEET'                => array(23040.000,  8640.000), // = ( 8128 x 3048 ) mm  = (320.00 x 120.00) in
2431		'96SHEET'                => array(34560.000,  8640.000), // = (12192 x 3048 ) mm  = (480.00 x 120.00) in
2432		// -- Old European Sizes
2433		// - Old Imperial English Sizes
2434		'EN_EMPEROR'             => array( 3456.000,  5184.000), // = ( 1219 x 1829 ) mm  = ( 48.00 x 72.00 ) in
2435		'EN_ANTIQUARIAN'         => array( 2232.000,  3816.000), // = (  787 x 1346 ) mm  = ( 31.00 x 53.00 ) in
2436		'EN_GRAND_EAGLE'         => array( 2070.000,  3024.000), // = (  730 x 1067 ) mm  = ( 28.75 x 42.00 ) in
2437		'EN_DOUBLE_ELEPHANT'     => array( 1926.000,  2880.000), // = (  679 x 1016 ) mm  = ( 26.75 x 40.00 ) in
2438		'EN_ATLAS'               => array( 1872.000,  2448.000), // = (  660 x 864  ) mm  = ( 26.00 x 34.00 ) in
2439		'EN_COLOMBIER'           => array( 1692.000,  2484.000), // = (  597 x 876  ) mm  = ( 23.50 x 34.50 ) in
2440		'EN_ELEPHANT'            => array( 1656.000,  2016.000), // = (  584 x 711  ) mm  = ( 23.00 x 28.00 ) in
2441		'EN_DOUBLE_DEMY'         => array( 1620.000,  2556.000), // = (  572 x 902  ) mm  = ( 22.50 x 35.50 ) in
2442		'EN_IMPERIAL'            => array( 1584.000,  2160.000), // = (  559 x 762  ) mm  = ( 22.00 x 30.00 ) in
2443		'EN_PRINCESS'            => array( 1548.000,  2016.000), // = (  546 x 711  ) mm  = ( 21.50 x 28.00 ) in
2444		'EN_CARTRIDGE'           => array( 1512.000,  1872.000), // = (  533 x 660  ) mm  = ( 21.00 x 26.00 ) in
2445		'EN_DOUBLE_LARGE_POST'   => array( 1512.000,  2376.000), // = (  533 x 838  ) mm  = ( 21.00 x 33.00 ) in
2446		'EN_ROYAL'               => array( 1440.000,  1800.000), // = (  508 x 635  ) mm  = ( 20.00 x 25.00 ) in
2447		'EN_SHEET'               => array( 1404.000,  1692.000), // = (  495 x 597  ) mm  = ( 19.50 x 23.50 ) in
2448		'EN_HALF_POST'           => array( 1404.000,  1692.000), // = (  495 x 597  ) mm  = ( 19.50 x 23.50 ) in
2449		'EN_SUPER_ROYAL'         => array( 1368.000,  1944.000), // = (  483 x 686  ) mm  = ( 19.00 x 27.00 ) in
2450		'EN_DOUBLE_POST'         => array( 1368.000,  2196.000), // = (  483 x 775  ) mm  = ( 19.00 x 30.50 ) in
2451		'EN_MEDIUM'              => array( 1260.000,  1656.000), // = (  445 x 584  ) mm  = ( 17.50 x 23.00 ) in
2452		'EN_DEMY'                => array( 1260.000,  1620.000), // = (  445 x 572  ) mm  = ( 17.50 x 22.50 ) in
2453		'EN_LARGE_POST'          => array( 1188.000,  1512.000), // = (  419 x 533  ) mm  = ( 16.50 x 21.00 ) in
2454		'EN_COPY_DRAUGHT'        => array( 1152.000,  1440.000), // = (  406 x 508  ) mm  = ( 16.00 x 20.00 ) in
2455		'EN_POST'                => array( 1116.000,  1386.000), // = (  394 x 489  ) mm  = ( 15.50 x 19.25 ) in
2456		'EN_CROWN'               => array( 1080.000,  1440.000), // = (  381 x 508  ) mm  = ( 15.00 x 20.00 ) in
2457		'EN_PINCHED_POST'        => array( 1062.000,  1332.000), // = (  375 x 470  ) mm  = ( 14.75 x 18.50 ) in
2458		'EN_BRIEF'               => array(  972.000,  1152.000), // = (  343 x 406  ) mm  = ( 13.50 x 16.00 ) in
2459		'EN_FOOLSCAP'            => array(  972.000,  1224.000), // = (  343 x 432  ) mm  = ( 13.50 x 17.00 ) in
2460		'EN_SMALL_FOOLSCAP'      => array(  954.000,  1188.000), // = (  337 x 419  ) mm  = ( 13.25 x 16.50 ) in
2461		'EN_POTT'                => array(  900.000,  1080.000), // = (  318 x 381  ) mm  = ( 12.50 x 15.00 ) in
2462		// - Old Imperial Belgian Sizes
2463		'BE_GRAND_AIGLE'         => array( 1984.252,  2948.031), // = (  700 x 1040 ) mm  = ( 27.56 x 40.94 ) in
2464		'BE_COLOMBIER'           => array( 1757.480,  2409.449), // = (  620 x 850  ) mm  = ( 24.41 x 33.46 ) in
2465		'BE_DOUBLE_CARRE'        => array( 1757.480,  2607.874), // = (  620 x 920  ) mm  = ( 24.41 x 36.22 ) in
2466		'BE_ELEPHANT'            => array( 1746.142,  2182.677), // = (  616 x 770  ) mm  = ( 24.25 x 30.31 ) in
2467		'BE_PETIT_AIGLE'         => array( 1700.787,  2381.102), // = (  600 x 840  ) mm  = ( 23.62 x 33.07 ) in
2468		'BE_GRAND_JESUS'         => array( 1559.055,  2069.291), // = (  550 x 730  ) mm  = ( 21.65 x 28.74 ) in
2469		'BE_JESUS'               => array( 1530.709,  2069.291), // = (  540 x 730  ) mm  = ( 21.26 x 28.74 ) in
2470		'BE_RAISIN'              => array( 1417.323,  1842.520), // = (  500 x 650  ) mm  = ( 19.69 x 25.59 ) in
2471		'BE_GRAND_MEDIAN'        => array( 1303.937,  1714.961), // = (  460 x 605  ) mm  = ( 18.11 x 23.82 ) in
2472		'BE_DOUBLE_POSTE'        => array( 1233.071,  1601.575), // = (  435 x 565  ) mm  = ( 17.13 x 22.24 ) in
2473		'BE_COQUILLE'            => array( 1218.898,  1587.402), // = (  430 x 560  ) mm  = ( 16.93 x 22.05 ) in
2474		'BE_PETIT_MEDIAN'        => array( 1176.378,  1502.362), // = (  415 x 530  ) mm  = ( 16.34 x 20.87 ) in
2475		'BE_RUCHE'               => array( 1020.472,  1303.937), // = (  360 x 460  ) mm  = ( 14.17 x 18.11 ) in
2476		'BE_PROPATRIA'           => array(  977.953,  1218.898), // = (  345 x 430  ) mm  = ( 13.58 x 16.93 ) in
2477		'BE_LYS'                 => array(  898.583,  1125.354), // = (  317 x 397  ) mm  = ( 12.48 x 15.63 ) in
2478		'BE_POT'                 => array(  870.236,  1088.504), // = (  307 x 384  ) mm  = ( 12.09 x 15.12 ) in
2479		'BE_ROSETTE'             => array(  765.354,   983.622), // = (  270 x 347  ) mm  = ( 10.63 x 13.66 ) in
2480		// - Old Imperial French Sizes
2481		'FR_UNIVERS'             => array( 2834.646,  3685.039), // = ( 1000 x 1300 ) mm  = ( 39.37 x 51.18 ) in
2482		'FR_DOUBLE_COLOMBIER'    => array( 2551.181,  3571.654), // = (  900 x 1260 ) mm  = ( 35.43 x 49.61 ) in
2483		'FR_GRANDE_MONDE'        => array( 2551.181,  3571.654), // = (  900 x 1260 ) mm  = ( 35.43 x 49.61 ) in
2484		'FR_DOUBLE_SOLEIL'       => array( 2267.717,  3401.575), // = (  800 x 1200 ) mm  = ( 31.50 x 47.24 ) in
2485		'FR_DOUBLE_JESUS'        => array( 2154.331,  3174.803), // = (  760 x 1120 ) mm  = ( 29.92 x 44.09 ) in
2486		'FR_GRAND_AIGLE'         => array( 2125.984,  3004.724), // = (  750 x 1060 ) mm  = ( 29.53 x 41.73 ) in
2487		'FR_PETIT_AIGLE'         => array( 1984.252,  2664.567), // = (  700 x 940  ) mm  = ( 27.56 x 37.01 ) in
2488		'FR_DOUBLE_RAISIN'       => array( 1842.520,  2834.646), // = (  650 x 1000 ) mm  = ( 25.59 x 39.37 ) in
2489		'FR_JOURNAL'             => array( 1842.520,  2664.567), // = (  650 x 940  ) mm  = ( 25.59 x 37.01 ) in
2490		'FR_COLOMBIER_AFFICHE'   => array( 1785.827,  2551.181), // = (  630 x 900  ) mm  = ( 24.80 x 35.43 ) in
2491		'FR_DOUBLE_CAVALIER'     => array( 1757.480,  2607.874), // = (  620 x 920  ) mm  = ( 24.41 x 36.22 ) in
2492		'FR_CLOCHE'              => array( 1700.787,  2267.717), // = (  600 x 800  ) mm  = ( 23.62 x 31.50 ) in
2493		'FR_SOLEIL'              => array( 1700.787,  2267.717), // = (  600 x 800  ) mm  = ( 23.62 x 31.50 ) in
2494		'FR_DOUBLE_CARRE'        => array( 1587.402,  2551.181), // = (  560 x 900  ) mm  = ( 22.05 x 35.43 ) in
2495		'FR_DOUBLE_COQUILLE'     => array( 1587.402,  2494.488), // = (  560 x 880  ) mm  = ( 22.05 x 34.65 ) in
2496		'FR_JESUS'               => array( 1587.402,  2154.331), // = (  560 x 760  ) mm  = ( 22.05 x 29.92 ) in
2497		'FR_RAISIN'              => array( 1417.323,  1842.520), // = (  500 x 650  ) mm  = ( 19.69 x 25.59 ) in
2498		'FR_CAVALIER'            => array( 1303.937,  1757.480), // = (  460 x 620  ) mm  = ( 18.11 x 24.41 ) in
2499		'FR_DOUBLE_COURONNE'     => array( 1303.937,  2040.945), // = (  460 x 720  ) mm  = ( 18.11 x 28.35 ) in
2500		'FR_CARRE'               => array( 1275.591,  1587.402), // = (  450 x 560  ) mm  = ( 17.72 x 22.05 ) in
2501		'FR_COQUILLE'            => array( 1247.244,  1587.402), // = (  440 x 560  ) mm  = ( 17.32 x 22.05 ) in
2502		'FR_DOUBLE_TELLIERE'     => array( 1247.244,  1927.559), // = (  440 x 680  ) mm  = ( 17.32 x 26.77 ) in
2503		'FR_DOUBLE_CLOCHE'       => array( 1133.858,  1700.787), // = (  400 x 600  ) mm  = ( 15.75 x 23.62 ) in
2504		'FR_DOUBLE_POT'          => array( 1133.858,  1757.480), // = (  400 x 620  ) mm  = ( 15.75 x 24.41 ) in
2505		'FR_ECU'                 => array( 1133.858,  1474.016), // = (  400 x 520  ) mm  = ( 15.75 x 20.47 ) in
2506		'FR_COURONNE'            => array( 1020.472,  1303.937), // = (  360 x 460  ) mm  = ( 14.17 x 18.11 ) in
2507		'FR_TELLIERE'            => array(  963.780,  1247.244), // = (  340 x 440  ) mm  = ( 13.39 x 17.32 ) in
2508		'FR_POT'                 => array(  878.740,  1133.858), // = (  310 x 400  ) mm  = ( 12.20 x 15.75 ) in
2509	);
2510
2511
2512	/**
2513	 * Get page dimensions from format name.
2514	 * @param mixed $format The format name @see self::$page_format<ul>
2515	 * @return array containing page width and height in points
2516	 * @since 5.0.010 (2010-05-17)
2517	 * @public static
2518	 */
2519	public static function getPageSizeFromFormat($format) {
2520		if (isset(self::$page_formats[$format])) {
2521			return self::$page_formats[$format];
2522		}
2523		return self::$page_formats['A4'];
2524	}
2525
2526	/**
2527	 * Set page boundaries.
2528	 * @param int $page page number
2529	 * @param string $type valid values are: <ul><li>'MediaBox' : the boundaries of the physical medium on which the page shall be displayed or printed;</li><li>'CropBox' : the visible region of default user space;</li><li>'BleedBox' : the region to which the contents of the page shall be clipped when output in a production environment;</li><li>'TrimBox' : the intended dimensions of the finished page after trimming;</li><li>'ArtBox' : the page's meaningful content (including potential white space).</li></ul>
2530	 * @param float $llx lower-left x coordinate in user units.
2531	 * @param float $lly lower-left y coordinate in user units.
2532	 * @param float $urx upper-right x coordinate in user units.
2533	 * @param float $ury upper-right y coordinate in user units.
2534	 * @param boolean $points If true uses user units as unit of measure, otherwise uses PDF points.
2535	 * @param float $k Scale factor (number of points in user unit).
2536	 * @param array $pagedim Array of page dimensions.
2537	 * @return array pagedim array of page dimensions.
2538	 * @since 5.0.010 (2010-05-17)
2539	 * @public static
2540	 */
2541	public static function setPageBoxes($page, $type, $llx, $lly, $urx, $ury, $points, $k, $pagedim=array()) {
2542		if (!isset($pagedim[$page])) {
2543			// initialize array
2544			$pagedim[$page] = array();
2545		}
2546		if (!in_array($type, self::$pageboxes)) {
2547			return;
2548		}
2549		if ($points) {
2550			$k = 1;
2551		}
2552		$pagedim[$page][$type]['llx'] = ($llx * $k);
2553		$pagedim[$page][$type]['lly'] = ($lly * $k);
2554		$pagedim[$page][$type]['urx'] = ($urx * $k);
2555		$pagedim[$page][$type]['ury'] = ($ury * $k);
2556		return $pagedim;
2557	}
2558
2559	/**
2560	 * Swap X and Y coordinates of page boxes (change page boxes orientation).
2561	 * @param int $page page number
2562	 * @param array $pagedim Array of page dimensions.
2563	 * @return array pagedim array of page dimensions.
2564	 * @since 5.0.010 (2010-05-17)
2565	 * @public static
2566	 */
2567	public static function swapPageBoxCoordinates($page, $pagedim) {
2568		foreach (self::$pageboxes as $type) {
2569			// swap X and Y coordinates
2570			if (isset($pagedim[$page][$type])) {
2571				$tmp = $pagedim[$page][$type]['llx'];
2572				$pagedim[$page][$type]['llx'] = $pagedim[$page][$type]['lly'];
2573				$pagedim[$page][$type]['lly'] = $tmp;
2574				$tmp = $pagedim[$page][$type]['urx'];
2575				$pagedim[$page][$type]['urx'] = $pagedim[$page][$type]['ury'];
2576				$pagedim[$page][$type]['ury'] = $tmp;
2577			}
2578		}
2579		return $pagedim;
2580	}
2581
2582	/**
2583	 * Get the canonical page layout mode.
2584	 * @param string $layout The page layout. Possible values are:<ul><li>SinglePage Display one page at a time</li><li>OneColumn Display the pages in one column</li><li>TwoColumnLeft Display the pages in two columns, with odd-numbered pages on the left</li><li>TwoColumnRight Display the pages in two columns, with odd-numbered pages on the right</li><li>TwoPageLeft (PDF 1.5) Display the pages two at a time, with odd-numbered pages on the left</li><li>TwoPageRight (PDF 1.5) Display the pages two at a time, with odd-numbered pages on the right</li></ul>
2585	 * @return string Canonical page layout name.
2586	 * @public static
2587	 */
2588	public static function getPageLayoutMode($layout='SinglePage') {
2589		switch ($layout) {
2590			case 'default':
2591			case 'single':
2592			case 'SinglePage': {
2593				$layout_mode = 'SinglePage';
2594				break;
2595			}
2596			case 'continuous':
2597			case 'OneColumn': {
2598				$layout_mode = 'OneColumn';
2599				break;
2600			}
2601			case 'two':
2602			case 'TwoColumnLeft': {
2603				$layout_mode = 'TwoColumnLeft';
2604				break;
2605			}
2606			case 'TwoColumnRight': {
2607				$layout_mode = 'TwoColumnRight';
2608				break;
2609			}
2610			case 'TwoPageLeft': {
2611				$layout_mode = 'TwoPageLeft';
2612				break;
2613			}
2614			case 'TwoPageRight': {
2615				$layout_mode = 'TwoPageRight';
2616				break;
2617			}
2618			default: {
2619				$layout_mode = 'SinglePage';
2620			}
2621		}
2622		return $layout_mode;
2623	}
2624
2625	/**
2626	 * Get the canonical page layout mode.
2627	 * @param string $mode A name object specifying how the document should be displayed when opened:<ul><li>UseNone Neither document outline nor thumbnail images visible</li><li>UseOutlines Document outline visible</li><li>UseThumbs Thumbnail images visible</li><li>FullScreen Full-screen mode, with no menu bar, window controls, or any other window visible</li><li>UseOC (PDF 1.5) Optional content group panel visible</li><li>UseAttachments (PDF 1.6) Attachments panel visible</li></ul>
2628	 * @return string Canonical page mode name.
2629	 * @public static
2630	 */
2631	public static function getPageMode($mode='UseNone') {
2632		switch ($mode) {
2633			case 'UseNone': {
2634				$page_mode = 'UseNone';
2635				break;
2636			}
2637			case 'UseOutlines': {
2638				$page_mode = 'UseOutlines';
2639				break;
2640			}
2641			case 'UseThumbs': {
2642				$page_mode = 'UseThumbs';
2643				break;
2644			}
2645			case 'FullScreen': {
2646				$page_mode = 'FullScreen';
2647				break;
2648			}
2649			case 'UseOC': {
2650				$page_mode = 'UseOC';
2651				break;
2652			}
2653			case '': {
2654				$page_mode = 'UseAttachments';
2655				break;
2656			}
2657			default: {
2658				$page_mode = 'UseNone';
2659			}
2660		}
2661		return $page_mode;
2662	}
2663
2664
2665} // END OF TCPDF_STATIC CLASS
2666
2667//============================================================+
2668// END OF FILE
2669//============================================================+
2670