1<?php 2 3/** 4 * Smarty error handler 5 * 6 * @package Smarty 7 * @subpackage PluginsInternal 8 * @author Uwe Tews 9 * 10 * @deprecated 11Smarty does no longer use @filemtime() 12 */ 13class Smarty_Internal_ErrorHandler 14{ 15 /** 16 * contains directories outside of SMARTY_DIR that are to be muted by muteExpectedErrors() 17 */ 18 public static $mutedDirectories = array(); 19 20 /** 21 * error handler returned by set_error_handler() in self::muteExpectedErrors() 22 */ 23 private static $previousErrorHandler = null; 24 25 /** 26 * Enable error handler to mute expected messages 27 * 28 */ 29 public static function muteExpectedErrors() 30 { 31 /* 32 error muting is done because some people implemented custom error_handlers using 33 http://php.net/set_error_handler and for some reason did not understand the following paragraph: 34 35 It is important to remember that the standard PHP error handler is completely bypassed for the 36 error types specified by error_types unless the callback function returns FALSE. 37 error_reporting() settings will have no effect and your error handler will be called regardless - 38 however you are still able to read the current value of error_reporting and act appropriately. 39 Of particular note is that this value will be 0 if the statement that caused the error was 40 prepended by the @ error-control operator. 41 42 Smarty deliberately uses @filemtime() over file_exists() and filemtime() in some places. Reasons include 43 - @filemtime() is almost twice as fast as using an additional file_exists() 44 - between file_exists() and filemtime() a possible race condition is opened, 45 which does not exist using the simple @filemtime() approach. 46 */ 47 $error_handler = array('Smarty_Internal_ErrorHandler', 'mutingErrorHandler'); 48 $previous = set_error_handler($error_handler); 49 // avoid dead loops 50 if ($previous !== $error_handler) { 51 self::$previousErrorHandler = $previous; 52 } 53 } 54 55 /** 56 * Error Handler to mute expected messages 57 * 58 * @link http://php.net/set_error_handler 59 * 60 * @param integer $errno Error level 61 * @param $errstr 62 * @param $errfile 63 * @param $errline 64 * @param $errcontext 65 * 66 * @return bool 67 */ 68 public static function mutingErrorHandler($errno, $errstr, $errfile, $errline, $errcontext) 69 { 70 $_is_muted_directory = false; 71 // add the SMARTY_DIR to the list of muted directories 72 if (!isset(self::$mutedDirectories[ SMARTY_DIR ])) { 73 $smarty_dir = realpath(SMARTY_DIR); 74 if ($smarty_dir !== false) { 75 self::$mutedDirectories[ SMARTY_DIR ] = 76 array('file' => $smarty_dir, 'length' => strlen($smarty_dir),); 77 } 78 } 79 // walk the muted directories and test against $errfile 80 foreach (self::$mutedDirectories as $key => &$dir) { 81 if (!$dir) { 82 // resolve directory and length for speedy comparisons 83 $file = realpath($key); 84 if ($file === false) { 85 // this directory does not exist, remove and skip it 86 unset(self::$mutedDirectories[ $key ]); 87 continue; 88 } 89 $dir = array('file' => $file, 'length' => strlen($file),); 90 } 91 if (!strncmp($errfile, $dir[ 'file' ], $dir[ 'length' ])) { 92 $_is_muted_directory = true; 93 break; 94 } 95 } 96 // pass to next error handler if this error did not occur inside SMARTY_DIR 97 // or the error was within smarty but masked to be ignored 98 if (!$_is_muted_directory || ($errno && $errno & error_reporting())) { 99 if (self::$previousErrorHandler) { 100 return call_user_func( 101 self::$previousErrorHandler, 102 $errno, 103 $errstr, 104 $errfile, 105 $errline, 106 $errcontext 107 ); 108 } else { 109 return false; 110 } 111 } 112 } 113} 114