1<?php
2
3/**
4 * The Mail_Mime class is used to create MIME E-mail messages
5 *
6 * The Mail_Mime class provides an OO interface to create MIME
7 * enabled email messages. This way you can create emails that
8 * contain plain-text bodies, HTML bodies, attachments, inline
9 * images and specific headers.
10 *
11 * Compatible with PHP version 5, 7 and 8
12 *
13 * LICENSE: This LICENSE is in the BSD license style.
14 * Copyright (c) 2002-2003, Richard Heyes <richard@phpguru.org>
15 * Copyright (c) 2003-2006, PEAR <pear-group@php.net>
16 * All rights reserved.
17 *
18 * Redistribution and use in source and binary forms, with or
19 * without modification, are permitted provided that the following
20 * conditions are met:
21 *
22 * - Redistributions of source code must retain the above copyright
23 *   notice, this list of conditions and the following disclaimer.
24 * - Redistributions in binary form must reproduce the above copyright
25 *   notice, this list of conditions and the following disclaimer in the
26 *   documentation and/or other materials provided with the distribution.
27 * - Neither the name of the authors, nor the names of its contributors
28 *   may be used to endorse or promote products derived from this
29 *   software without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
32 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
35 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
36 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
37 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
38 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
39 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
41 * THE POSSIBILITY OF SUCH DAMAGE.
42 *
43 * @category  Mail
44 * @package   Mail_Mime
45 * @author    Richard Heyes  <richard@phpguru.org>
46 * @author    Tomas V.V. Cox <cox@idecnet.com>
47 * @author    Cipriano Groenendal <cipri@php.net>
48 * @author    Sean Coates <sean@php.net>
49 * @author    Aleksander Machniak <alec@php.net>
50 * @copyright 2003-2006 PEAR <pear-group@php.net>
51 * @license   http://www.opensource.org/licenses/bsd-license.php BSD License
52 * @version   Release: @package_version@
53 * @link      http://pear.php.net/package/Mail_mime
54 *
55 *            This class is based on HTML Mime Mail class from
56 *            Richard Heyes <richard@phpguru.org> which was based also
57 *            in the mime_mail.class by Tobias Ratschiller <tobias@dnet.it>
58 *            and Sascha Schumann <sascha@schumann.cx>
59 */
60
61
62require_once 'PEAR.php';
63require_once 'Mail/mimePart.php';
64
65
66/**
67 * The Mail_Mime class provides an OO interface to create MIME
68 * enabled email messages. This way you can create emails that
69 * contain plain-text bodies, HTML bodies, attachments, inline
70 * images and specific headers.
71 *
72 * @category  Mail
73 * @package   Mail_Mime
74 * @author    Richard Heyes  <richard@phpguru.org>
75 * @author    Tomas V.V. Cox <cox@idecnet.com>
76 * @author    Cipriano Groenendal <cipri@php.net>
77 * @author    Sean Coates <sean@php.net>
78 * @copyright 2003-2006 PEAR <pear-group@php.net>
79 * @license   http://www.opensource.org/licenses/bsd-license.php BSD License
80 * @version   Release: @package_version@
81 * @link      http://pear.php.net/package/Mail_mime
82 */
83class Mail_mime
84{
85    /**
86     * Contains the plain text part of the email
87     *
88     * @var string
89     */
90    protected $txtbody = '';
91
92    /**
93     * Contains the html part of the email
94     *
95     * @var string
96     */
97    protected $htmlbody = '';
98
99    /**
100     * Contains the text/calendar part of the email
101     *
102     * @var string
103     */
104    protected $calbody = '';
105
106    /**
107     * List of the attached images
108     *
109     * @var array
110     */
111    protected $html_images = array();
112
113    /**
114     * List of the attachements
115     *
116     * @var array
117     */
118    protected $parts = array();
119
120    /**
121     * Headers for the mail
122     *
123     * @var array
124     */
125    protected $headers = array();
126
127    /**
128     * Build parameters
129     *
130     * @var array
131     */
132    protected $build_params = array(
133        // What encoding to use for the headers
134        // Options: quoted-printable or base64
135        'head_encoding' => 'quoted-printable',
136        // What encoding to use for plain text
137        // Options: 7bit, 8bit, base64, or quoted-printable
138        'text_encoding' => 'quoted-printable',
139        // What encoding to use for html
140        // Options: 7bit, 8bit, base64, or quoted-printable
141        'html_encoding' => 'quoted-printable',
142        // What encoding to use for calendar part
143        // Options: 7bit, 8bit, base64, or quoted-printable
144        'calendar_encoding' => 'quoted-printable',
145        // The character set to use for html
146        'html_charset'  => 'ISO-8859-1',
147        // The character set to use for text
148        'text_charset'  => 'ISO-8859-1',
149        // The character set to use for calendar part
150        'calendar_charset'  => 'UTF-8',
151        // The character set to use for headers
152        'head_charset'  => 'ISO-8859-1',
153        // End-of-line sequence
154        'eol'           => "\r\n",
155        // Delay attachment files IO until building the message
156        'delay_file_io' => false,
157        // Default calendar method
158        'calendar_method' => 'request',
159        // multipart part preamble (RFC2046 5.1.1)
160        'preamble' => '',
161    );
162
163
164    /**
165     * Constructor function
166     *
167     * @param mixed $params Build parameters that change the way the email
168     *                      is built. Should be an associative array.
169     *                      See $_build_params.
170     *
171     * @return void
172     */
173    public function __construct($params = array())
174    {
175        // Backward-compatible EOL setting
176        if (is_string($params)) {
177            $this->build_params['eol'] = $params;
178        } else if (defined('MAIL_MIME_CRLF') && !isset($params['eol'])) {
179            $this->build_params['eol'] = MAIL_MIME_CRLF;
180        }
181
182        // Update build parameters
183        if (!empty($params) && is_array($params)) {
184            $this->build_params = array_merge($this->build_params, $params);
185        }
186    }
187
188    /**
189     * Set build parameter value
190     *
191     * @param string $name  Parameter name
192     * @param string $value Parameter value
193     *
194     * @return void
195     * @since  1.6.0
196     */
197    public function setParam($name, $value)
198    {
199        $this->build_params[$name] = $value;
200    }
201
202    /**
203     * Get build parameter value
204     *
205     * @param string $name Parameter name
206     *
207     * @return mixed Parameter value
208     * @since  1.6.0
209     */
210    public function getParam($name)
211    {
212        return isset($this->build_params[$name]) ? $this->build_params[$name] : null;
213    }
214
215    /**
216     * Accessor function to set the body text. Body text is used if
217     * it's not an html mail being sent or else is used to fill the
218     * text/plain part that emails clients who don't support
219     * html should show.
220     *
221     * @param string $data   Either a string or the file name with the contents
222     * @param bool   $isfile If true the first param should be treated
223     *                       as a file name, else as a string (default)
224     * @param bool   $append If true the text or file is appended to
225     *                       the existing body, else the old body is
226     *                       overwritten
227     *
228     * @return mixed True on success or PEAR_Error object
229     */
230    public function setTXTBody($data, $isfile = false, $append = false)
231    {
232        return $this->setBody('txtbody', $data, $isfile, $append);
233    }
234
235    /**
236     * Get message text body
237     *
238     * @return string Text body
239     * @since  1.6.0
240     */
241    public function getTXTBody()
242    {
243        return $this->txtbody;
244    }
245
246    /**
247     * Adds a html part to the mail.
248     *
249     * @param string $data   Either a string or the file name with the contents
250     * @param bool   $isfile A flag that determines whether $data is a
251     *                       filename, or a string(false, default)
252     *
253     * @return bool True on success or PEAR_Error object
254     */
255    public function setHTMLBody($data, $isfile = false)
256    {
257        return $this->setBody('htmlbody', $data, $isfile);
258    }
259
260    /**
261     * Get message HTML body
262     *
263     * @return string HTML body
264     * @since  1.6.0
265     */
266    public function getHTMLBody()
267    {
268        return $this->htmlbody;
269    }
270
271    /**
272     * Function to set a body of text/calendar part (not attachment)
273     *
274     * @param string $data     Either a string or the file name with the contents
275     * @param bool   $isfile   If true the first param should be treated
276     *                         as a file name, else as a string (default)
277     * @param bool   $append   If true the text or file is appended to
278     *                         the existing body, else the old body is
279     *                         overwritten
280     * @param string $method   iCalendar object method
281     * @param string $charset  iCalendar character set
282     * @param string $encoding Transfer encoding
283     *
284     * @return mixed True on success or PEAR_Error object
285     * @since  1.9.0
286     */
287    public function setCalendarBody($data, $isfile = false, $append = false,
288        $method = 'request', $charset = 'UTF-8', $encoding = 'quoted-printable'
289    ) {
290        $result = $this->setBody('calbody', $data, $isfile, $append);
291
292        if ($result === true) {
293            $this->build_params['calendar_method']  = $method;
294            $this->build_params['calendar_charset'] = $charset;
295            $this->build_params['calendar_encoding'] = $encoding;
296        }
297    }
298
299    /**
300     * Get body of calendar part
301     *
302     * @return string Calendar part body
303     * @since  1.9.0
304     */
305    public function getCalendarBody()
306    {
307        return $this->calbody;
308    }
309
310    /**
311     * Adds an image to the list of embedded images.
312     * Images added this way will be added as related parts of the HTML message.
313     *
314     * To correctly match the HTML image with the related attachment
315     * HTML should refer to it by a filename (specified in $file or $name
316     * arguments) or by cid:<content-id> (specified in $content_id arg).
317     *
318     * @param string $file       The image file name OR image data itself
319     * @param string $c_type     The content type
320     * @param string $name       The filename of the image. Used to find
321     *                           the image in HTML content.
322     * @param bool   $isfile     Whether $file is a filename or not.
323     *                           Defaults to true
324     * @param string $content_id Desired Content-ID of MIME part
325     *                           Defaults to generated unique ID
326     *
327     * @return bool True on success
328     */
329    public function addHTMLImage($file,
330        $c_type = 'application/octet-stream',
331        $name = '',
332        $isfile = true,
333        $content_id = null
334    ) {
335        $bodyfile = null;
336
337        if ($isfile) {
338            // Don't load file into memory
339            if ($this->build_params['delay_file_io']) {
340                $filedata = null;
341                $bodyfile = $file;
342            } else {
343                if (self::isError($filedata = $this->file2str($file))) {
344                    return $filedata;
345                }
346            }
347
348            $filename = $name ? $name : $file;
349        } else {
350            $filedata = $file;
351            $filename = $name;
352        }
353
354        if (!$content_id) {
355            $content_id = preg_replace('/[^0-9a-zA-Z]/', '', uniqid(time(), true));
356        }
357
358        $this->html_images[] = array(
359            'body'      => $filedata,
360            'body_file' => $bodyfile,
361            'name'      => $filename,
362            'c_type'    => $c_type,
363            'cid'       => $content_id
364        );
365
366        return true;
367    }
368
369    /**
370     * Adds a file to the list of attachments.
371     *
372     * @param mixed  $file        The file name or the file contents itself,
373     *                            it can be also Mail_mimePart object
374     * @param string $c_type      The content type
375     * @param string $name        The filename of the attachment
376     *                            Only use if $file is the contents
377     * @param bool   $isfile      Whether $file is a filename or not. Defaults to true
378     * @param string $encoding    The type of encoding to use. Defaults to base64.
379     *                            Possible values: 7bit, 8bit, base64 or quoted-printable.
380     * @param string $disposition The content-disposition of this file
381     *                            Defaults to attachment.
382     *                            Possible values: attachment, inline.
383     * @param string $charset     The character set of attachment's content.
384     * @param string $language    The language of the attachment
385     * @param string $location    The RFC 2557.4 location of the attachment
386     * @param string $n_encoding  Encoding of the attachment's name in Content-Type
387     *                            By default filenames are encoded using RFC2231 method
388     *                            Here you can set RFC2047 encoding (quoted-printable
389     *                            or base64) instead
390     * @param string $f_encoding  Encoding of the attachment's filename
391     *                            in Content-Disposition header.
392     * @param string $description Content-Description header
393     * @param string $h_charset   The character set of the headers e.g. filename
394     *                            If not specified, $charset will be used
395     * @param array  $add_headers Additional part headers. Array keys can be in form
396     *                            of <header_name>:<parameter_name>
397     *
398     * @return mixed True on success or PEAR_Error object
399     */
400    public function addAttachment($file,
401        $c_type      = 'application/octet-stream',
402        $name        = '',
403        $isfile      = true,
404        $encoding    = 'base64',
405        $disposition = 'attachment',
406        $charset     = '',
407        $language    = '',
408        $location    = '',
409        $n_encoding  = null,
410        $f_encoding  = null,
411        $description = '',
412        $h_charset   = null,
413        $add_headers = array()
414    ) {
415        if ($file instanceof Mail_mimePart) {
416            $this->parts[] = $file;
417            return true;
418        }
419
420        $bodyfile = null;
421
422        if ($isfile) {
423            // Don't load file into memory
424            if ($this->build_params['delay_file_io']) {
425                $filedata = null;
426                $bodyfile = $file;
427            } else {
428                if (self::isError($filedata = $this->file2str($file))) {
429                    return $filedata;
430                }
431            }
432            // Force the name the user supplied, otherwise use $file
433            $filename = ($name ? $name : $this->basename($file));
434        } else {
435            $filedata = $file;
436            $filename = $name;
437        }
438
439        if (!strlen($filename)) {
440            $msg = "The supplied filename for the attachment can't be empty";
441            return self::raiseError($msg);
442        }
443
444        $this->parts[] = array(
445            'body'        => $filedata,
446            'body_file'   => $bodyfile,
447            'name'        => $filename,
448            'c_type'      => $c_type,
449            'charset'     => $charset,
450            'encoding'    => $encoding,
451            'language'    => $language,
452            'location'    => $location,
453            'disposition' => $disposition,
454            'description' => $description,
455            'add_headers' => $add_headers,
456            'name_encoding'     => $n_encoding,
457            'filename_encoding' => $f_encoding,
458            'headers_charset'   => $h_charset,
459        );
460
461        return true;
462    }
463
464    /**
465     * Checks if the current message has many parts
466     *
467     * @return bool True if the message has many parts, False otherwise.
468     * @since  1.9.0
469     */
470    public function isMultipart()
471    {
472        return count($this->parts) > 0 || count($this->html_images) > 0
473            || (strlen($this->htmlbody) > 0 && strlen($this->txtbody) > 0);
474    }
475
476    /**
477     * Get the contents of the given file name as string
478     *
479     * @param string $file_name Path of file to process
480     *
481     * @return string Contents of $file_name
482     */
483    protected function file2str($file_name)
484    {
485        // Check state of file and raise an error properly
486        if (!file_exists($file_name)) {
487            return self::raiseError('File not found: ' . $file_name);
488        }
489        if (!is_file($file_name)) {
490            return self::raiseError('Not a regular file: ' . $file_name);
491        }
492        if (!is_readable($file_name)) {
493            return self::raiseError('File is not readable: ' . $file_name);
494        }
495
496        // Temporarily reset magic_quotes_runtime and read file contents
497        if (version_compare(PHP_VERSION, '5.4.0', '<')) {
498            $magic_quotes = @ini_set('magic_quotes_runtime', 0);
499        }
500
501        $cont = file_get_contents($file_name);
502
503        if (isset($magic_quotes)) {
504            @ini_set('magic_quotes_runtime', $magic_quotes);
505        }
506
507        return $cont;
508    }
509
510    /**
511     * Adds a text subpart to the mimePart object and
512     * returns it during the build process.
513     *
514     * @param mixed $obj The object to add the part to, or
515     *                   anything else if a new object is to be created.
516     *
517     * @return object The text mimePart object
518     */
519    protected function addTextPart($obj = null)
520    {
521        return $this->addBodyPart($obj, $this->txtbody, 'text/plain', 'text');
522    }
523
524    /**
525     * Adds a html subpart to the mimePart object and
526     * returns it during the build process.
527     *
528     * @param mixed $obj The object to add the part to, or
529     *                   anything else if a new object is to be created.
530     *
531     * @return object The html mimePart object
532     */
533    protected function addHtmlPart($obj = null)
534    {
535        return $this->addBodyPart($obj, $this->htmlbody, 'text/html', 'html');
536    }
537
538    /**
539     * Adds a calendar subpart to the mimePart object and
540     * returns it during the build process.
541     *
542     * @param mixed $obj The object to add the part to, or
543     *                   anything else if a new object is to be created.
544     *
545     * @return object The text mimePart object
546     */
547    protected function addCalendarPart($obj = null)
548    {
549        $ctype = 'text/calendar; method='. $this->build_params['calendar_method'];
550
551        return $this->addBodyPart($obj, $this->calbody, $ctype, 'calendar');
552    }
553
554    /**
555     * Creates a new mimePart object, using multipart/mixed as
556     * the initial content-type and returns it during the
557     * build process.
558     *
559     * @param array $params Additional part parameters
560     *
561     * @return object The multipart/mixed mimePart object
562     */
563    protected function addMixedPart($params = array())
564    {
565        $params['content_type'] = 'multipart/mixed';
566        $params['eol']          = $this->build_params['eol'];
567
568        // Create empty multipart/mixed Mail_mimePart object to return
569        return new Mail_mimePart('', $params);
570    }
571
572    /**
573     * Adds a multipart/alternative part to a mimePart
574     * object (or creates one), and returns it during
575     * the build process.
576     *
577     * @param mixed $obj The object to add the part to, or
578     *                   anything else if a new object is to be created.
579     *
580     * @return object The multipart/mixed mimePart object
581     */
582    protected function addAlternativePart($obj = null)
583    {
584        $params['content_type'] = 'multipart/alternative';
585        $params['eol']          = $this->build_params['eol'];
586
587        if (is_object($obj)) {
588            $ret = $obj->addSubpart('', $params);
589        } else {
590            $ret = new Mail_mimePart('', $params);
591        }
592
593        return $ret;
594    }
595
596    /**
597     * Adds a multipart/related part to a mimePart
598     * object (or creates one), and returns it during
599     * the build process.
600     *
601     * @param mixed $obj The object to add the part to, or
602     *                   anything else if a new object is to be created
603     *
604     * @return object The multipart/mixed mimePart object
605     */
606    protected function addRelatedPart($obj = null)
607    {
608        $params['content_type'] = 'multipart/related';
609        $params['eol']          = $this->build_params['eol'];
610
611        if (is_object($obj)) {
612            $ret = $obj->addSubpart('', $params);
613        } else {
614            $ret = new Mail_mimePart('', $params);
615        }
616
617        return $ret;
618    }
619
620    /**
621     * Adds an html image subpart to a mimePart object
622     * and returns it during the build process.
623     *
624     * @param object $obj   The mimePart to add the image to
625     * @param array  $value The image information
626     *
627     * @return object The image mimePart object
628     */
629    protected function addHtmlImagePart($obj, $value)
630    {
631        $params['content_type'] = $value['c_type'];
632        $params['encoding']     = 'base64';
633        $params['disposition']  = 'inline';
634        $params['filename']     = $value['name'];
635        $params['cid']          = $value['cid'];
636        $params['body_file']    = $value['body_file'];
637        $params['eol']          = $this->build_params['eol'];
638
639        if (!empty($value['name_encoding'])) {
640            $params['name_encoding'] = $value['name_encoding'];
641        }
642        if (!empty($value['filename_encoding'])) {
643            $params['filename_encoding'] = $value['filename_encoding'];
644        }
645
646        return $obj->addSubpart($value['body'], $params);
647    }
648
649    /**
650     * Adds an attachment subpart to a mimePart object
651     * and returns it during the build process.
652     *
653     * @param object $obj   The mimePart to add the image to
654     * @param mixed  $value The attachment information array or Mail_mimePart object
655     *
656     * @return object The image mimePart object
657     */
658    protected function addAttachmentPart($obj, $value)
659    {
660        if ($value instanceof Mail_mimePart) {
661            return $obj->addSubpart($value);
662        }
663
664        $params['eol']          = $this->build_params['eol'];
665        $params['filename']     = $value['name'];
666        $params['encoding']     = $value['encoding'];
667        $params['content_type'] = $value['c_type'];
668        $params['body_file']    = $value['body_file'];
669        $params['disposition']  = isset($value['disposition']) ?
670                                  $value['disposition'] : 'attachment';
671
672        // content charset
673        if (!empty($value['charset'])) {
674            $params['charset'] = $value['charset'];
675        }
676        // headers charset (filename, description)
677        if (!empty($value['headers_charset'])) {
678            $params['headers_charset'] = $value['headers_charset'];
679        }
680        if (!empty($value['language'])) {
681            $params['language'] = $value['language'];
682        }
683        if (!empty($value['location'])) {
684            $params['location'] = $value['location'];
685        }
686        if (!empty($value['name_encoding'])) {
687            $params['name_encoding'] = $value['name_encoding'];
688        }
689        if (!empty($value['filename_encoding'])) {
690            $params['filename_encoding'] = $value['filename_encoding'];
691        }
692        if (!empty($value['description'])) {
693            $params['description'] = $value['description'];
694        }
695        if (is_array($value['add_headers'])) {
696            $params['headers'] = $value['add_headers'];
697        }
698
699        return $obj->addSubpart($value['body'], $params);
700    }
701
702    /**
703     * Returns the complete e-mail, ready to send using an alternative
704     * mail delivery method. Note that only the mailpart that is made
705     * with Mail_Mime is created. This means that,
706     * YOU WILL HAVE NO TO: HEADERS UNLESS YOU SET IT YOURSELF
707     * using the $headers parameter!
708     *
709     * @param string $separation The separation between these two parts.
710     * @param array  $params     The Build parameters passed to the
711     *                           get() function. See get() for more info.
712     * @param array  $headers    The extra headers that should be passed
713     *                           to the headers() method.
714     *                           See that function for more info.
715     * @param bool   $overwrite  Overwrite the existing headers with new.
716     *
717     * @return mixed The complete e-mail or PEAR error object
718     */
719    public function getMessage($separation = null, $params = null, $headers = null,
720        $overwrite = false
721    ) {
722        if ($separation === null) {
723            $separation = $this->build_params['eol'];
724        }
725
726        $body = $this->get($params);
727
728        if (self::isError($body)) {
729            return $body;
730        }
731
732        return $this->txtHeaders($headers, $overwrite) . $separation . $body;
733    }
734
735    /**
736     * Returns the complete e-mail body, ready to send using an alternative
737     * mail delivery method.
738     *
739     * @param array $params The Build parameters passed to the
740     *                      get() method. See get() for more info.
741     *
742     * @return mixed The e-mail body or PEAR error object
743     * @since  1.6.0
744     */
745    public function getMessageBody($params = null)
746    {
747        return $this->get($params, null, true);
748    }
749
750    /**
751     * Writes (appends) the complete e-mail into file.
752     *
753     * @param string $filename  Output file location
754     * @param array  $params    The Build parameters passed to the
755     *                          get() method. See get() for more info.
756     * @param array  $headers   The extra headers that should be passed
757     *                          to the headers() function.
758     *                          See that function for more info.
759     * @param bool   $overwrite Overwrite the existing headers with new.
760     *
761     * @return mixed True or PEAR error object
762     * @since  1.6.0
763     */
764    public function saveMessage($filename, $params = null, $headers = null, $overwrite = false)
765    {
766        // Check state of file and raise an error properly
767        if (file_exists($filename) && !is_writable($filename)) {
768            return self::raiseError('File is not writable: ' . $filename);
769        }
770
771        // Temporarily reset magic_quotes_runtime and read file contents
772        if (version_compare(PHP_VERSION, '5.4.0', '<')) {
773            $magic_quotes = @ini_set('magic_quotes_runtime', 0);
774        }
775
776        if (!($fh = fopen($filename, 'ab'))) {
777            return self::raiseError('Unable to open file: ' . $filename);
778        }
779
780        // Write message headers into file (skipping Content-* headers)
781        $head = $this->txtHeaders($headers, $overwrite, true);
782        if (fwrite($fh, $head) === false) {
783            return self::raiseError('Error writing to file: ' . $filename);
784        }
785
786        fclose($fh);
787
788        if (isset($magic_quotes)) {
789            @ini_set('magic_quotes_runtime', $magic_quotes);
790        }
791
792        // Write the rest of the message into file
793        $res = $this->get($params, $filename);
794
795        return $res ? $res : true;
796    }
797
798    /**
799     * Writes (appends) the complete e-mail body into file or stream.
800     *
801     * @param mixed $filename Output filename or file pointer where to save
802     *                        the message instead of returning it
803     * @param array $params   The Build parameters passed to the
804     *                        get() method. See get() for more info.
805     *
806     * @return mixed True or PEAR error object
807     * @since  1.6.0
808     */
809    public function saveMessageBody($filename, $params = null)
810    {
811        if (!is_resource($filename)) {
812            // Check state of file and raise an error properly
813            if (!file_exists($filename) || !is_writable($filename)) {
814                return self::raiseError('File is not writable: ' . $filename);
815            }
816
817            if (!($fh = fopen($filename, 'ab'))) {
818                return self::raiseError('Unable to open file: ' . $filename);
819            }
820        } else {
821            $fh = $filename;
822        }
823
824        // Temporarily reset magic_quotes_runtime and read file contents
825        if (version_compare(PHP_VERSION, '5.4.0', '<')) {
826            $magic_quotes = @ini_set('magic_quotes_runtime', 0);
827        }
828
829        // Write the rest of the message into file
830        $res = $this->get($params, $fh, true);
831
832        if (!is_resource($filename)) {
833            fclose($fh);
834        }
835
836        if (isset($magic_quotes)) {
837            @ini_set('magic_quotes_runtime', $magic_quotes);
838        }
839
840        return $res ? $res : true;
841    }
842
843    /**
844     * Builds the multipart message from the list ($this->parts) and
845     * returns the mime content.
846     *
847     * @param array   $params    Build parameters that change the way the email
848     *                           is built. Should be associative. See $_build_params.
849     * @param mixed   $filename  Output filename or file pointer where to save
850     *                           the message instead of returning it
851     * @param boolean $skip_head True if you want to return/save only the message
852     *                           without headers
853     *
854     * @return mixed The MIME message content string, null or PEAR error object
855     */
856    public function get($params = null, $filename = null, $skip_head = false)
857    {
858        if (!empty($params) && is_array($params)) {
859            $this->build_params = array_merge($this->build_params, $params);
860        }
861
862        if (isset($this->headers['From'])) {
863            // Bug #11381: Illegal characters in domain ID
864            if (preg_match('#(@[0-9a-zA-Z\-\.]+)#', $this->headers['From'], $matches)) {
865                $domainID = $matches[1];
866            } else {
867                $domainID = '@localhost';
868            }
869
870            foreach ($this->html_images as $i => $img) {
871                $cid = $this->html_images[$i]['cid'];
872                if (!preg_match('#'.preg_quote($domainID).'$#', $cid)) {
873                    $this->html_images[$i]['cid'] = $cid . $domainID;
874                }
875            }
876        }
877
878        if (count($this->html_images) && strlen($this->htmlbody) > 0) {
879            foreach ($this->html_images as $key => $value) {
880                $rval  = preg_quote($value['name'], '#');
881                $regex = array(
882                    '#(\s)((?i)src|background|href(?-i))\s*=\s*(["\']?)' . $rval . '\3#',
883                    '#(?i)url(?-i)\(\s*(["\']?)' . $rval . '\1\s*\)#',
884                );
885
886                $rep = array(
887                    '\1\2=\3cid:' . $value['cid'] .'\3',
888                    'url(\1cid:' . $value['cid'] . '\1)',
889                );
890
891                $this->htmlbody = preg_replace($regex, $rep, $this->htmlbody);
892                $this->html_images[$key]['name']
893                    = $this->basename($this->html_images[$key]['name']);
894            }
895        }
896
897        $this->checkParams();
898
899        $message = $this->buildBodyPart();
900
901        if (!isset($message)) {
902            return null;
903        }
904
905        // Use saved boundary
906        if (!empty($this->build_params['boundary'])) {
907            $boundary = $this->build_params['boundary'];
908        } else {
909            $boundary = null;
910        }
911
912        // Write output to file
913        if ($filename) {
914            // Append mimePart message headers and body into file
915            $headers = $message->encodeToFile($filename, $boundary, $skip_head);
916            if (self::isError($headers)) {
917                return $headers;
918            }
919            $this->headers = array_merge($this->headers, $headers);
920        } else {
921            $output = $message->encode($boundary, $skip_head);
922            if (self::isError($output)) {
923                return $output;
924            }
925            $this->headers = array_merge($this->headers, $output['headers']);
926        }
927
928        // remember the boundary used, in case we'd handle headers() call later
929        if (empty($boundary) && !empty($this->headers['Content-Type'])) {
930            if (preg_match('/boundary="([^"]+)/', $this->headers['Content-Type'], $m)) {
931                $this->build_params['boundary'] = $m[1];
932            }
933        }
934
935        return $filename ? null : $output['body'];
936    }
937
938    /**
939     * Builds the main body MIME part for the email body. It will add a mixed part
940     * if attachments are found.  If no attachments are found  it will return an
941     * alternative part if several body texts are found (text, html, calendar),
942     * or a single part if only one body text is found.
943     *
944     * @return Mail_mimePart|null The corresponding part for the body or null.
945     *
946     * @see buildAlternativeParts
947     * @see buildHtmlParts
948     */
949    protected function buildBodyPart()
950    {
951        $parts_count  = count($this->parts);
952        $mixed_params = array('preamble' => $this->build_params['preamble']);
953        $message      = null;
954
955        if ($parts_count > 0) {
956            $message = $this->addMixedPart($mixed_params);
957            $this->buildAlternativeParts($message, null);
958            for ($i = 0; $i < $parts_count; $i++) {
959                $this->addAttachmentPart($message, $this->parts[$i]);
960            }
961        } else {
962            $message = $this->buildAlternativeParts(null, $mixed_params);
963        }
964
965        return $message;
966    }
967
968    /**
969     * Builds a single text, html, or calendar part only if one of them is found.
970     * If two or more parts are found, then an alternative part containing them is built.
971     *
972     * @param Mail_mimePart|null $parent_part  The parent mime part to add
973     *                                         the part or null
974     * @param array              $mixed_params The needed params to create the
975     *                                         part when no parent_part is
976     *                                         received.
977     *
978     * @return null|object The main part built inside the method. It will be an
979     *                     alternative part or text, html, or calendar part.
980     *                     Null if no body texts are found.
981     */
982    protected function buildAlternativeParts($parent_part, $mixed_params = null)
983    {
984        $html               = strlen($this->htmlbody) > 0;
985        $calendar           = strlen($this->calbody) > 0;
986        $has_text           = strlen($this->txtbody) > 0;
987        $alternatives_count = $html + $calendar + $has_text;
988
989        if ($alternatives_count > 1) {
990            $alt_part = $this->addAlternativePart($parent_part ? $parent_part : $mixed_params);
991        } else {
992            $alt_part = null;
993        }
994
995        $dest_part = $alt_part ? $alt_part : $parent_part;
996        $part = null;
997
998        if ($has_text) {
999            $part = $this->addTextPart($dest_part);
1000        }
1001
1002        if ($html) {
1003            $part = $this->buildHtmlParts($dest_part);
1004        }
1005
1006        if ($calendar) {
1007            $part = $this->addCalendarPart($dest_part);
1008        }
1009
1010        return $dest_part ? $dest_part : $part;
1011    }
1012
1013    /**
1014     * Builds html part as a single part or inside a related part with the html
1015     * images thar were found.
1016     *
1017     * @param Mail_mimePart|null $parent_part The object to add the part to,
1018     *                                        or anything else if a new object
1019     *                                        is to be created.
1020     *
1021     * @return Mail_mimePart|null The created part or null if no htmlbody found.
1022     */
1023    protected function buildHtmlParts($parent_part)
1024    {
1025        if (!strlen($this->htmlbody)) {
1026            return null;
1027        }
1028
1029        $count_html_images = count($this->html_images);
1030
1031        if ($count_html_images > 0) {
1032            $part = $this->addRelatedPart($parent_part);
1033            $this->addHtmlPart($part);
1034        } else {
1035            $part = $this->addHtmlPart($parent_part);
1036        }
1037
1038        for ($i = 0; $i < $count_html_images; $i++) {
1039            $this->addHtmlImagePart($part, $this->html_images[$i]);
1040        }
1041
1042        return $part;
1043    }
1044
1045    /**
1046     * Returns an array with the headers needed to prepend to the email
1047     * (MIME-Version and Content-Type). Format of argument is:
1048     * $array['header-name'] = 'header-value';
1049     *
1050     * @param array $xtra_headers Assoc array with any extra headers (optional)
1051     *                            (Don't set Content-Type for multipart messages here!)
1052     * @param bool  $overwrite    Overwrite already existing headers.
1053     * @param bool  $skip_content Don't return content headers: Content-Type,
1054     *                            Content-Disposition and Content-Transfer-Encoding
1055     *
1056     * @return array Assoc array with the mime headers
1057     */
1058    public function headers($xtra_headers = null, $overwrite = false, $skip_content = false)
1059    {
1060        // Add mime version header
1061        $headers['MIME-Version'] = '1.0';
1062
1063        if (!empty($xtra_headers)) {
1064            $headers = array_merge($headers, $xtra_headers);
1065        }
1066
1067        if ($overwrite) {
1068            $this->headers = array_merge($this->headers, $headers);
1069        } else {
1070            $this->headers = array_merge($headers, $this->headers);
1071        }
1072
1073        // Always reset Content-Type/Content-Transfer-Encoding headers
1074        // In case the message structure changed in meantime
1075        unset($this->headers['Content-Type']);
1076        unset($this->headers['Content-Transfer-Encoding']);
1077        unset($this->headers['Content-Disposition']);
1078
1079        $this->headers = array_merge($this->headers, $this->contentHeaders());
1080
1081        $headers = $this->headers;
1082
1083        if ($skip_content) {
1084            unset($headers['Content-Type']);
1085            unset($headers['Content-Transfer-Encoding']);
1086            unset($headers['Content-Disposition']);
1087        } else if (!empty($this->build_params['ctype'])) {
1088            $headers['Content-Type'] = $this->build_params['ctype'];
1089        }
1090
1091        return $this->encodeHeaders($headers);
1092    }
1093
1094    /**
1095     * Get the text version of the headers
1096     * (usefull if you want to use the PHP mail() function)
1097     *
1098     * @param array $xtra_headers Assoc array with any extra headers (optional)
1099     *                            (Don't set Content-Type for multipart messages here!)
1100     * @param bool  $overwrite    Overwrite the existing headers with new.
1101     * @param bool  $skip_content Don't return content headers: Content-Type,
1102     *                            Content-Disposition and Content-Transfer-Encoding
1103     *
1104     * @return string Plain text headers
1105     */
1106    public function txtHeaders($xtra_headers = null, $overwrite = false, $skip_content = false)
1107    {
1108        $headers = $this->headers($xtra_headers, $overwrite, $skip_content);
1109
1110        // Place Received: headers at the beginning of the message
1111        // Spam detectors often flag messages with it after the Subject: as spam
1112        if (isset($headers['Received'])) {
1113            $received = $headers['Received'];
1114            unset($headers['Received']);
1115            $headers = array('Received' => $received) + $headers;
1116        }
1117
1118        $ret = '';
1119        $eol = $this->build_params['eol'];
1120
1121        foreach ($headers as $key => $val) {
1122            if (is_array($val)) {
1123                foreach ($val as $value) {
1124                    $ret .= "$key: $value" . $eol;
1125                }
1126            } else {
1127                $ret .= "$key: $val" . $eol;
1128            }
1129        }
1130
1131        return $ret;
1132    }
1133
1134    /**
1135     * Sets message Content-Type header.
1136     * Use it to build messages with various content-types e.g. miltipart/raport
1137     * not supported by contentHeaders() function.
1138     *
1139     * @param string $type   Type name
1140     * @param array  $params Hash array of header parameters
1141     *
1142     * @return void
1143     * @since  1.7.0
1144     */
1145    public function setContentType($type, $params = array())
1146    {
1147        $header = $type;
1148
1149        $eol = !empty($this->build_params['eol']) ? $this->build_params['eol'] : "\r\n";
1150
1151        // add parameters
1152        $token_regexp = '#([^\x21\x23-\x27\x2A\x2B\x2D\x2E\x30-\x39\x41-\x5A\x5E-\x7E])#';
1153
1154        if (is_array($params)) {
1155            foreach ($params as $name => $value) {
1156                if ($name == 'boundary') {
1157                    $this->build_params['boundary'] = $value;
1158                } else if (!preg_match($token_regexp, $value)) {
1159                    $header .= ";$eol $name=$value";
1160                } else {
1161                    $value = addcslashes($value, '\\"');
1162                    $header .= ";$eol $name=\"$value\"";
1163                }
1164            }
1165        }
1166
1167        // add required boundary parameter if not defined
1168        if (stripos($type, 'multipart/') === 0) {
1169            if (empty($this->build_params['boundary'])) {
1170                $this->build_params['boundary'] = '=_' . md5(rand() . microtime());
1171            }
1172
1173            $header .= ";$eol boundary=\"".$this->build_params['boundary']."\"";
1174        }
1175
1176        $this->build_params['ctype'] = $header;
1177    }
1178
1179    /**
1180     * Sets the Subject header
1181     *
1182     * @param string $subject String to set the subject to.
1183     *
1184     * @return void
1185     */
1186    public function setSubject($subject)
1187    {
1188        $this->headers['Subject'] = $subject;
1189    }
1190
1191    /**
1192     * Set an email to the From (the sender) header
1193     *
1194     * @param string $email The email address to use
1195     *
1196     * @return void
1197     */
1198    public function setFrom($email)
1199    {
1200        $this->headers['From'] = $email;
1201    }
1202
1203    /**
1204     * Add an email to the To header
1205     * (multiple calls to this method are allowed)
1206     *
1207     * @param string $email The email direction to add
1208     *
1209     * @return void
1210     */
1211    public function addTo($email)
1212    {
1213        if (isset($this->headers['To'])) {
1214            $this->headers['To'] .= ", $email";
1215        } else {
1216            $this->headers['To'] = $email;
1217        }
1218    }
1219
1220    /**
1221     * Add an email to the Cc (carbon copy) header
1222     * (multiple calls to this method are allowed)
1223     *
1224     * @param string $email The email direction to add
1225     *
1226     * @return void
1227     */
1228    public function addCc($email)
1229    {
1230        if (isset($this->headers['Cc'])) {
1231            $this->headers['Cc'] .= ", $email";
1232        } else {
1233            $this->headers['Cc'] = $email;
1234        }
1235    }
1236
1237    /**
1238     * Add an email to the Bcc (blank carbon copy) header
1239     * (multiple calls to this method are allowed)
1240     *
1241     * @param string $email The email direction to add
1242     *
1243     * @return void
1244     */
1245    public function addBcc($email)
1246    {
1247        if (isset($this->headers['Bcc'])) {
1248            $this->headers['Bcc'] .= ", $email";
1249        } else {
1250            $this->headers['Bcc'] = $email;
1251        }
1252    }
1253
1254    /**
1255     * Since the PHP send function requires you to specify
1256     * recipients (To: header) separately from the other
1257     * headers, the To: header is not properly encoded.
1258     * To fix this, you can use this public method to encode
1259     * your recipients before sending to the send function.
1260     *
1261     * @param string $recipients A comma-delimited list of recipients
1262     *
1263     * @return string Encoded data
1264     */
1265    public function encodeRecipients($recipients)
1266    {
1267        $input  = array('To' => $recipients);
1268        $retval = $this->encodeHeaders($input);
1269
1270        return $retval['To'] ;
1271    }
1272
1273    /**
1274     * Encodes headers as per RFC2047
1275     *
1276     * @param array $input  The header data to encode
1277     * @param array $params Extra build parameters
1278     *
1279     * @return array Encoded data
1280     */
1281    protected function encodeHeaders($input, $params = array())
1282    {
1283        $build_params = $this->build_params;
1284
1285        if (!empty($params)) {
1286            $build_params = array_merge($build_params, $params);
1287        }
1288
1289        foreach ($input as $hdr_name => $hdr_value) {
1290            if (is_array($hdr_value)) {
1291                foreach ($hdr_value as $idx => $value) {
1292                    $input[$hdr_name][$idx] = $this->encodeHeader(
1293                        $hdr_name, $value,
1294                        $build_params['head_charset'], $build_params['head_encoding']
1295                    );
1296                }
1297            } else if ($hdr_value !== null) {
1298                $input[$hdr_name] = $this->encodeHeader(
1299                    $hdr_name, $hdr_value,
1300                    $build_params['head_charset'], $build_params['head_encoding']
1301                );
1302            } else {
1303                unset($input[$hdr_name]);
1304            }
1305        }
1306
1307        return $input;
1308    }
1309
1310    /**
1311     * Encodes a header as per RFC2047
1312     *
1313     * @param string $name     The header name
1314     * @param string $value    The header data to encode
1315     * @param string $charset  Character set name
1316     * @param string $encoding Encoding name (base64 or quoted-printable)
1317     *
1318     * @return string Encoded header data (without a name)
1319     * @since  1.5.3
1320     */
1321    public function encodeHeader($name, $value, $charset, $encoding)
1322    {
1323        return Mail_mimePart::encodeHeader(
1324            $name, $value, $charset, $encoding, $this->build_params['eol']
1325        );
1326    }
1327
1328    /**
1329     * Get file's basename (locale independent)
1330     *
1331     * @param string $filename Filename
1332     *
1333     * @return string Basename
1334     */
1335    protected function basename($filename)
1336    {
1337        // basename() is not unicode safe and locale dependent
1338        if (stristr(PHP_OS, 'win') || stristr(PHP_OS, 'netware')) {
1339            return preg_replace('/^.*[\\\\\\/]/', '', $filename);
1340        } else {
1341            return preg_replace('/^.*[\/]/', '', $filename);
1342        }
1343    }
1344
1345    /**
1346     * Get Content-Type and Content-Transfer-Encoding headers of the message
1347     *
1348     * @return array Headers array
1349     */
1350    protected function contentHeaders()
1351    {
1352        $attachments      = count($this->parts) > 0;
1353        $html_images      = count($this->html_images) > 0;
1354        $html             = strlen($this->htmlbody) > 0;
1355        $calendar         = strlen($this->calbody) > 0;
1356        $has_text         = strlen($this->txtbody) > 0;
1357        $has_alternatives = ($html + $calendar + $has_text) > 1;
1358        $headers          = array();
1359
1360        // See get()
1361        switch (true) {
1362        case $has_text && !$attachments && !$has_alternatives:
1363            $headers['Content-Type'] = 'text/plain';
1364            break;
1365
1366        case $html && !$html_images && !$attachments && !$has_alternatives:
1367            $headers['Content-Type'] = 'text/html';
1368            break;
1369
1370        case $html && $html_images && !$attachments && !$has_alternatives:
1371            $headers['Content-Type'] = 'multipart/related';
1372            break;
1373
1374        case $calendar && !$attachments && !$has_alternatives:
1375            $headers['Content-Type'] = 'text/calendar';
1376            break;
1377
1378        case $has_alternatives && !$attachments:
1379            $headers['Content-Type'] = 'multipart/alternative';
1380            break;
1381
1382        case $attachments:
1383            $headers['Content-Type'] = 'multipart/mixed';
1384            break;
1385        }
1386
1387        // Note: This is outside of the above switch construct to workaround
1388        // opcache bug: https://bugzilla.opensuse.org/show_bug.cgi?id=1166235
1389        if (empty($headers)) {
1390            return $headers;
1391        }
1392
1393        $this->checkParams();
1394
1395        $eol = !empty($this->build_params['eol'])
1396            ? $this->build_params['eol'] : "\r\n";
1397
1398        if ($headers['Content-Type'] == 'text/plain') {
1399            // single-part message: add charset and encoding
1400            if ($this->build_params['text_charset']) {
1401                $charset = 'charset=' . $this->build_params['text_charset'];
1402                // place charset parameter in the same line, if possible
1403                // 26 = strlen("Content-Type: text/plain; ")
1404                $headers['Content-Type']
1405                    .= (strlen($charset) + 26 <= 76) ? "; $charset" : ";$eol $charset";
1406            }
1407
1408            $headers['Content-Transfer-Encoding']
1409                = $this->build_params['text_encoding'];
1410        } else if ($headers['Content-Type'] == 'text/html') {
1411            // single-part message: add charset and encoding
1412            if ($this->build_params['html_charset']) {
1413                $charset = 'charset=' . $this->build_params['html_charset'];
1414                // place charset parameter in the same line, if possible
1415                $headers['Content-Type']
1416                    .= (strlen($charset) + 25 <= 76) ? "; $charset" : ";$eol $charset";
1417            }
1418            $headers['Content-Transfer-Encoding']
1419                = $this->build_params['html_encoding'];
1420        } else if ($headers['Content-Type'] == 'text/calendar') {
1421            // single-part message: add charset and encoding
1422            if ($this->build_params['calendar_charset']) {
1423                $charset = 'charset=' . $this->build_params['calendar_charset'];
1424                $headers['Content-Type'] .= "; $charset";
1425            }
1426
1427            if ($this->build_params['calendar_method']) {
1428                $method = 'method=' . $this->build_params['calendar_method'];
1429                $headers['Content-Type'] .= "; $method";
1430            }
1431
1432            $headers['Content-Transfer-Encoding']
1433                = $this->build_params['calendar_encoding'];
1434        } else {
1435            // multipart message: and boundary
1436            if (!empty($this->build_params['boundary'])) {
1437                $boundary = $this->build_params['boundary'];
1438            } else if (!empty($this->headers['Content-Type'])
1439                && preg_match('/boundary="([^"]+)"/', $this->headers['Content-Type'], $m)
1440            ) {
1441                $boundary = $m[1];
1442            } else {
1443                $boundary = '=_' . md5(rand() . microtime());
1444            }
1445
1446            $this->build_params['boundary'] = $boundary;
1447            $headers['Content-Type'] .= ";$eol boundary=\"$boundary\"";
1448        }
1449
1450        return $headers;
1451    }
1452
1453    /**
1454     * Validate and set build parameters
1455     *
1456     * @return void
1457     */
1458    protected function checkParams()
1459    {
1460        $encodings = array('7bit', '8bit', 'base64', 'quoted-printable');
1461
1462        $this->build_params['text_encoding']
1463            = strtolower($this->build_params['text_encoding']);
1464        $this->build_params['html_encoding']
1465            = strtolower($this->build_params['html_encoding']);
1466        $this->build_params['calendar_encoding']
1467            = strtolower($this->build_params['calendar_encoding']);
1468
1469        if (!in_array($this->build_params['text_encoding'], $encodings)) {
1470            $this->build_params['text_encoding'] = '7bit';
1471        }
1472        if (!in_array($this->build_params['html_encoding'], $encodings)) {
1473            $this->build_params['html_encoding'] = '7bit';
1474        }
1475        if (!in_array($this->build_params['calendar_encoding'], $encodings)) {
1476            $this->build_params['calendar_encoding'] = '7bit';
1477        }
1478
1479        // text body
1480        if ($this->build_params['text_encoding'] == '7bit'
1481            && !preg_match('/ascii/i', $this->build_params['text_charset'])
1482            && preg_match('/[^\x00-\x7F]/', $this->txtbody)
1483        ) {
1484            $this->build_params['text_encoding'] = 'quoted-printable';
1485        }
1486        // html body
1487        if ($this->build_params['html_encoding'] == '7bit'
1488            && !preg_match('/ascii/i', $this->build_params['html_charset'])
1489            && preg_match('/[^\x00-\x7F]/', $this->htmlbody)
1490        ) {
1491            $this->build_params['html_encoding'] = 'quoted-printable';
1492        }
1493        // calendar body
1494        if ($this->build_params['calendar_encoding'] == '7bit'
1495            && !preg_match('/ascii/i', $this->build_params['calendar_charset'])
1496            && preg_match('/[^\x00-\x7F]/', $this->calbody)
1497        ) {
1498            $this->build_params['calendar_encoding'] = 'quoted-printable';
1499        }
1500    }
1501
1502    /**
1503     * Set body of specified message part
1504     *
1505     * @param string $type   One of: txtbody, calbody, htmlbody
1506     * @param string $data   Either a string or the file name with the contents
1507     * @param bool   $isfile If true the first param should be treated
1508     *                       as a file name, else as a string (default)
1509     * @param bool   $append If true the text or file is appended to
1510     *                       the existing body, else the old body is
1511     *                       overwritten
1512     *
1513     * @return mixed True on success or PEAR_Error object
1514     */
1515    protected function setBody($type, $data, $isfile = false, $append = false)
1516    {
1517        if ($isfile) {
1518            $data = $this->file2str($data);
1519            if (self::isError($data)) {
1520                return $data;
1521            }
1522        }
1523
1524        if (!$append) {
1525            $this->{$type} = $data;
1526        } else {
1527            $this->{$type} .= $data;
1528        }
1529
1530        return true;
1531    }
1532
1533    /**
1534     * Adds a subpart to the mimePart object and
1535     * returns it during the build process.
1536     *
1537     * @param mixed  $obj   The object to add the part to, or
1538     *                      anything else if a new object is to be created.
1539     * @param string $body  Part body
1540     * @param string $ctype Part content type
1541     * @param string $type  Internal part type
1542     *
1543     * @return object The mimePart object
1544     */
1545    protected function addBodyPart($obj, $body, $ctype, $type)
1546    {
1547        $params['content_type'] = $ctype;
1548        $params['encoding']     = $this->build_params[$type . '_encoding'];
1549        $params['charset']      = $this->build_params[$type . '_charset'];
1550        $params['eol']          = $this->build_params['eol'];
1551
1552        if (is_object($obj)) {
1553            $ret = $obj->addSubpart($body, $params);
1554        } else {
1555            $ret = new Mail_mimePart($body, $params);
1556        }
1557
1558        return $ret;
1559    }
1560
1561    /**
1562     * PEAR::isError implementation
1563     *
1564     * @param mixed $data Object
1565     *
1566     * @return bool True if object is an instance of PEAR_Error
1567     */
1568    public static function isError($data)
1569    {
1570        // PEAR::isError() is not PHP 5.4 compatible (see Bug #19473)
1571        if (is_a($data, 'PEAR_Error')) {
1572            return true;
1573        }
1574
1575        return false;
1576    }
1577
1578    /**
1579     * PEAR::raiseError implementation
1580     *
1581     * @param string $message A text error message
1582     *
1583     * @return PEAR_Error Instance of PEAR_Error
1584     */
1585    public static function raiseError($message)
1586    {
1587        // PEAR::raiseError() is not PHP 5.4 compatible
1588        return new PEAR_Error($message);
1589    }
1590}
1591