| 1: | <?php |
| 2: | |
| 3: | /** |
| 4: | * Smarty error handler |
| 5: | * |
| 6: | * @package Smarty |
| 7: | * @subpackage PluginsInternal |
| 8: | * @author Uwe Tews |
| 9: | * |
| 10: | * @deprecated |
| 11: | Smarty does no longer use @filemtime() |
| 12: | */ |
| 13: | class 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 = array()) |
| 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: |