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: |