3 * PEAR, the PHP Extension and Application Repository
5 * PEAR class and PEAR_Error class
11 * @author Sterling Hughes <sterling@php.net>
12 * @author Stig Bakken <ssb@php.net>
13 * @author Tomas V.V.Cox <cox@idecnet.com>
14 * @author Greg Beaver <cellog@php.net>
15 * @copyright 1997-2010 The Authors
16 * @license http://opensource.org/licenses/bsd-license.php New BSD License
17 * @link http://pear.php.net/package/PEAR
18 * @since File available since Release 0.1
24 define('PEAR_ERROR_RETURN', 1);
25 define('PEAR_ERROR_PRINT', 2);
26 define('PEAR_ERROR_TRIGGER', 4);
27 define('PEAR_ERROR_DIE', 8);
28 define('PEAR_ERROR_CALLBACK', 16);
33 define('PEAR_ERROR_EXCEPTION', 32);
36 if (substr(PHP_OS, 0, 3) == 'WIN') {
37 define('OS_WINDOWS', true);
38 define('OS_UNIX', false);
39 define('PEAR_OS', 'Windows');
41 define('OS_WINDOWS', false);
42 define('OS_UNIX', true);
43 define('PEAR_OS', 'Unix'); // blatant assumption
46 $GLOBALS['_PEAR_default_error_mode'] = PEAR_ERROR_RETURN;
47 $GLOBALS['_PEAR_default_error_options'] = E_USER_NOTICE;
48 $GLOBALS['_PEAR_destructor_object_list'] = array();
49 $GLOBALS['_PEAR_shutdown_funcs'] = array();
50 $GLOBALS['_PEAR_error_handler_stack'] = array();
52 @ini_set('track_errors', true);
55 * Base class for other PEAR classes. Provides rudimentary
56 * emulation of destructors.
58 * If you want a destructor in your class, inherit PEAR and make a
59 * destructor method called _yourclassname (same name as the
60 * constructor, but with a "_" prefix). Also, in your constructor you
61 * have to call the PEAR constructor: $this->PEAR();.
62 * The destructor method will be called without parameters. Note that
63 * at in some SAPI implementations (such as Apache), any output during
64 * the request shutdown (in which destructors are called) seems to be
65 * discarded. If you need to get any debug information from your
66 * destructor, use error_log(), syslog() or something similar.
68 * IMPORTANT! To use the emulated destructors you need to create the
69 * objects by reference: $obj =& new PEAR_child;
73 * @author Stig Bakken <ssb@php.net>
74 * @author Tomas V.V. Cox <cox@idecnet.com>
75 * @author Greg Beaver <cellog@php.net>
76 * @copyright 1997-2006 The PHP Group
77 * @license http://opensource.org/licenses/bsd-license.php New BSD License
78 * @version Release: 1.10.1
79 * @link http://pear.php.net/package/PEAR
81 * @since Class available since PHP 4.0.2
82 * @link http://pear.php.net/manual/en/core.pear.php#core.pear.pear
87 * Whether to enable internal debug messages.
95 * Default error mode for this object.
100 var $_default_error_mode = null;
103 * Default error options used for this object when error mode
104 * is PEAR_ERROR_TRIGGER.
109 var $_default_error_options = null;
112 * Default error handler (callback) for this object, if error mode is
113 * PEAR_ERROR_CALLBACK.
118 var $_default_error_handler = '';
121 * Which class to use for error objects.
126 var $_error_class = 'PEAR_Error';
129 * An array of expected errors.
134 var $_expected_errors = array();
137 * List of methods that can be called both statically and non-statically.
140 protected static $bivalentMethods = array(
141 'setErrorHandling' => true,
142 'raiseError' => true,
143 'throwError' => true,
144 'pushErrorHandling' => true,
145 'popErrorHandling' => true,
149 * Constructor. Registers this object in
150 * $_PEAR_destructor_object_list for destructor emulation if a
151 * destructor object exists.
153 * @param string $error_class (optional) which class to use for
154 * error objects, defaults to PEAR_Error.
158 function __construct($error_class = null)
160 $classname = strtolower(get_class($this));
162 print "PEAR constructor called, class=$classname\n";
165 if ($error_class !== null) {
166 $this->_error_class = $error_class;
169 while ($classname && strcasecmp($classname, "pear")) {
170 $destructor = "_$classname";
171 if (method_exists($this, $destructor)) {
172 global $_PEAR_destructor_object_list;
173 $_PEAR_destructor_object_list[] = &$this;
174 if (!isset($GLOBALS['_PEAR_SHUTDOWN_REGISTERED'])) {
175 register_shutdown_function("_PEAR_call_destructors");
176 $GLOBALS['_PEAR_SHUTDOWN_REGISTERED'] = true;
180 $classname = get_parent_class($classname);
186 * Only here for backwards compatibility.
187 * E.g. Archive_Tar calls $this->PEAR() in its constructor.
189 * @param string $error_class Which class to use for error objects,
190 * defaults to PEAR_Error.
192 public function PEAR($error_class = null)
194 self::__construct($error_class);
198 * Destructor (the emulated type of...). Does nothing right now,
199 * but is included for forward compatibility, so subclass
200 * destructors should always call it.
202 * See the note in the class desciption about output from
210 printf("PEAR destructor called, class=%s\n", strtolower(get_class($this)));
214 public function __call($method, $arguments)
216 if (!isset(self::$bivalentMethods[$method])) {
218 'Call to undefined method PEAR::' . $method . '()', E_USER_ERROR
221 return call_user_func_array(
222 array(get_class(), '_' . $method),
223 array_merge(array($this), $arguments)
227 public static function __callStatic($method, $arguments)
229 if (!isset(self::$bivalentMethods[$method])) {
231 'Call to undefined method PEAR::' . $method . '()', E_USER_ERROR
234 return call_user_func_array(
235 array(get_class(), '_' . $method),
236 array_merge(array(null), $arguments)
241 * If you have a class that's mostly/entirely static, and you need static
242 * properties, you can use this method to simulate them. Eg. in your method(s)
243 * do this: $myVar = &PEAR::getStaticProperty('myclass', 'myVar');
244 * You MUST use a reference, or they will not persist!
246 * @param string $class The calling classname, to prevent clashes
247 * @param string $var The variable to retrieve.
248 * @return mixed A reference to the variable. If not set it will be
249 * auto initialised to NULL.
251 public static function &getStaticProperty($class, $var)
254 if (!isset($properties[$class])) {
255 $properties[$class] = array();
258 if (!array_key_exists($var, $properties[$class])) {
259 $properties[$class][$var] = null;
262 return $properties[$class][$var];
266 * Use this function to register a shutdown method for static
269 * @param mixed $func The function name (or array of class/method) to call
270 * @param mixed $args The arguments to pass to the function
274 public static function registerShutdownFunc($func, $args = array())
276 // if we are called statically, there is a potential
277 // that no shutdown func is registered. Bug #6445
278 if (!isset($GLOBALS['_PEAR_SHUTDOWN_REGISTERED'])) {
279 register_shutdown_function("_PEAR_call_destructors");
280 $GLOBALS['_PEAR_SHUTDOWN_REGISTERED'] = true;
282 $GLOBALS['_PEAR_shutdown_funcs'][] = array($func, $args);
286 * Tell whether a value is a PEAR error.
288 * @param mixed $data the value to test
289 * @param int $code if $data is an error object, return true
290 * only if $code is a string and
291 * $obj->getMessage() == $code or
292 * $code is an integer and $obj->getCode() == $code
294 * @return bool true if parameter is an error
296 public static function isError($data, $code = null)
298 if (!is_a($data, 'PEAR_Error')) {
302 if (is_null($code)) {
304 } elseif (is_string($code)) {
305 return $data->getMessage() == $code;
308 return $data->getCode() == $code;
312 * Sets how errors generated by this object should be handled.
313 * Can be invoked both in objects and statically. If called
314 * statically, setErrorHandling sets the default behaviour for all
315 * PEAR objects. If called in an object, setErrorHandling sets
316 * the default behaviour for that object.
318 * @param object $object
319 * Object the method was called on (non-static mode)
322 * One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT,
323 * PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE,
324 * PEAR_ERROR_CALLBACK or PEAR_ERROR_EXCEPTION.
326 * @param mixed $options
327 * When $mode is PEAR_ERROR_TRIGGER, this is the error level (one
328 * of E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR).
330 * When $mode is PEAR_ERROR_CALLBACK, this parameter is expected
331 * to be the callback function or method. A callback
332 * function is a string with the name of the function, a
333 * callback method is an array of two elements: the element
334 * at index 0 is the object, and the element at index 1 is
335 * the name of the method to call in the object.
337 * When $mode is PEAR_ERROR_PRINT or PEAR_ERROR_DIE, this is
338 * a printf format string used when printing the error
343 * @see PEAR_ERROR_RETURN
344 * @see PEAR_ERROR_PRINT
345 * @see PEAR_ERROR_TRIGGER
346 * @see PEAR_ERROR_DIE
347 * @see PEAR_ERROR_CALLBACK
348 * @see PEAR_ERROR_EXCEPTION
352 protected static function _setErrorHandling(
353 $object, $mode = null, $options = null
355 if ($object !== null) {
356 $setmode = &$object->_default_error_mode;
357 $setoptions = &$object->_default_error_options;
359 $setmode = &$GLOBALS['_PEAR_default_error_mode'];
360 $setoptions = &$GLOBALS['_PEAR_default_error_options'];
364 case PEAR_ERROR_EXCEPTION:
365 case PEAR_ERROR_RETURN:
366 case PEAR_ERROR_PRINT:
367 case PEAR_ERROR_TRIGGER:
371 $setoptions = $options;
374 case PEAR_ERROR_CALLBACK:
376 // class/object method callback
377 if (is_callable($options)) {
378 $setoptions = $options;
380 trigger_error("invalid error callback", E_USER_WARNING);
385 trigger_error("invalid error mode", E_USER_WARNING);
391 * This method is used to tell which errors you expect to get.
392 * Expected errors are always returned with error mode
393 * PEAR_ERROR_RETURN. Expected error codes are stored in a stack,
394 * and this method pushes a new element onto it. The list of
395 * expected errors are in effect until they are popped off the
396 * stack with the popExpect() method.
398 * Note that this method can not be called statically
400 * @param mixed $code a single error code or an array of error codes to expect
402 * @return int the new depth of the "expected errors" stack
405 function expectError($code = '*')
407 if (is_array($code)) {
408 array_push($this->_expected_errors, $code);
410 array_push($this->_expected_errors, array($code));
412 return count($this->_expected_errors);
416 * This method pops one element off the expected error codes
419 * @return array the list of error codes that were popped
423 return array_pop($this->_expected_errors);
427 * This method checks unsets an error code if available
429 * @param mixed error code
430 * @return bool true if the error code was unset, false otherwise
434 function _checkDelExpect($error_code)
437 foreach ($this->_expected_errors as $key => $error_array) {
438 if (in_array($error_code, $error_array)) {
439 unset($this->_expected_errors[$key][array_search($error_code, $error_array)]);
443 // clean up empty arrays
444 if (0 == count($this->_expected_errors[$key])) {
445 unset($this->_expected_errors[$key]);
453 * This method deletes all occurences of the specified element from
454 * the expected error codes stack.
456 * @param mixed $error_code error code that should be deleted
457 * @return mixed list of error codes that were deleted or error
461 function delExpect($error_code)
464 if ((is_array($error_code) && (0 != count($error_code)))) {
465 // $error_code is a non-empty array here; we walk through it trying
466 // to unset all values
467 foreach ($error_code as $key => $error) {
468 $deleted = $this->_checkDelExpect($error) ? true : false;
471 return $deleted ? true : PEAR::raiseError("The expected error you submitted does not exist"); // IMPROVE ME
472 } elseif (!empty($error_code)) {
473 // $error_code comes alone, trying to unset it
474 if ($this->_checkDelExpect($error_code)) {
478 return PEAR::raiseError("The expected error you submitted does not exist"); // IMPROVE ME
481 // $error_code is empty
482 return PEAR::raiseError("The expected error you submitted is empty"); // IMPROVE ME
486 * This method is a wrapper that returns an instance of the
487 * configured error class with this object's default error
488 * handling applied. If the $mode and $options parameters are not
489 * specified, the object's defaults are used.
491 * @param mixed $message a text error message or a PEAR error object
493 * @param int $code a numeric error code (it is up to your class
494 * to define these if you want to use codes)
496 * @param int $mode One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT,
497 * PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE,
498 * PEAR_ERROR_CALLBACK, PEAR_ERROR_EXCEPTION.
500 * @param mixed $options If $mode is PEAR_ERROR_TRIGGER, this parameter
501 * specifies the PHP-internal error level (one of
502 * E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR).
503 * If $mode is PEAR_ERROR_CALLBACK, this
504 * parameter specifies the callback function or
505 * method. In other error modes this parameter
508 * @param string $userinfo If you need to pass along for example debug
509 * information, this parameter is meant for that.
511 * @param string $error_class The returned error object will be
512 * instantiated from this class, if specified.
514 * @param bool $skipmsg If true, raiseError will only pass error codes,
515 * the error message parameter will be dropped.
517 * @return object a PEAR error object
518 * @see PEAR::setErrorHandling
521 protected static function _raiseError($object,
530 // The error is yet a PEAR error object
531 if (is_object($message)) {
532 $code = $message->getCode();
533 $userinfo = $message->getUserInfo();
534 $error_class = $message->getType();
535 $message->error_message_prefix = '';
536 $message = $message->getMessage();
541 isset($object->_expected_errors) &&
542 count($object->_expected_errors) > 0 &&
543 count($exp = end($object->_expected_errors))
545 if ($exp[0] == "*" ||
546 (is_int(reset($exp)) && in_array($code, $exp)) ||
547 (is_string(reset($exp)) && in_array($message, $exp))
549 $mode = PEAR_ERROR_RETURN;
553 // No mode given, try global ones
554 if ($mode === null) {
555 // Class error handler
556 if ($object !== null && isset($object->_default_error_mode)) {
557 $mode = $object->_default_error_mode;
558 $options = $object->_default_error_options;
559 // Global error handler
560 } elseif (isset($GLOBALS['_PEAR_default_error_mode'])) {
561 $mode = $GLOBALS['_PEAR_default_error_mode'];
562 $options = $GLOBALS['_PEAR_default_error_options'];
566 if ($error_class !== null) {
568 } elseif ($object !== null && isset($object->_error_class)) {
569 $ec = $object->_error_class;
575 $a = new $ec($code, $mode, $options, $userinfo);
577 $a = new $ec($message, $code, $mode, $options, $userinfo);
584 * Simpler form of raiseError with fewer options. In most cases
585 * message, code and userinfo are enough.
587 * @param mixed $message a text error message or a PEAR error object
589 * @param int $code a numeric error code (it is up to your class
590 * to define these if you want to use codes)
592 * @param string $userinfo If you need to pass along for example debug
593 * information, this parameter is meant for that.
595 * @return object a PEAR error object
596 * @see PEAR::raiseError
598 protected static function _throwError($object, $message = null, $code = null, $userinfo = null)
600 if ($object !== null) {
601 $a = &$object->raiseError($message, $code, null, null, $userinfo);
605 $a = &PEAR::raiseError($message, $code, null, null, $userinfo);
609 public static function staticPushErrorHandling($mode, $options = null)
611 $stack = &$GLOBALS['_PEAR_error_handler_stack'];
612 $def_mode = &$GLOBALS['_PEAR_default_error_mode'];
613 $def_options = &$GLOBALS['_PEAR_default_error_options'];
614 $stack[] = array($def_mode, $def_options);
616 case PEAR_ERROR_EXCEPTION:
617 case PEAR_ERROR_RETURN:
618 case PEAR_ERROR_PRINT:
619 case PEAR_ERROR_TRIGGER:
623 $def_options = $options;
626 case PEAR_ERROR_CALLBACK:
628 // class/object method callback
629 if (is_callable($options)) {
630 $def_options = $options;
632 trigger_error("invalid error callback", E_USER_WARNING);
637 trigger_error("invalid error mode", E_USER_WARNING);
640 $stack[] = array($mode, $options);
644 public static function staticPopErrorHandling()
646 $stack = &$GLOBALS['_PEAR_error_handler_stack'];
647 $setmode = &$GLOBALS['_PEAR_default_error_mode'];
648 $setoptions = &$GLOBALS['_PEAR_default_error_options'];
650 list($mode, $options) = $stack[sizeof($stack) - 1];
653 case PEAR_ERROR_EXCEPTION:
654 case PEAR_ERROR_RETURN:
655 case PEAR_ERROR_PRINT:
656 case PEAR_ERROR_TRIGGER:
660 $setoptions = $options;
663 case PEAR_ERROR_CALLBACK:
665 // class/object method callback
666 if (is_callable($options)) {
667 $setoptions = $options;
669 trigger_error("invalid error callback", E_USER_WARNING);
674 trigger_error("invalid error mode", E_USER_WARNING);
681 * Push a new error handler on top of the error handler options stack. With this
682 * you can easily override the actual error handler for some code and restore
683 * it later with popErrorHandling.
685 * @param mixed $mode (same as setErrorHandling)
686 * @param mixed $options (same as setErrorHandling)
688 * @return bool Always true
690 * @see PEAR::setErrorHandling
692 protected static function _pushErrorHandling($object, $mode, $options = null)
694 $stack = &$GLOBALS['_PEAR_error_handler_stack'];
695 if ($object !== null) {
696 $def_mode = &$object->_default_error_mode;
697 $def_options = &$object->_default_error_options;
699 $def_mode = &$GLOBALS['_PEAR_default_error_mode'];
700 $def_options = &$GLOBALS['_PEAR_default_error_options'];
702 $stack[] = array($def_mode, $def_options);
704 if ($object !== null) {
705 $object->setErrorHandling($mode, $options);
707 PEAR::setErrorHandling($mode, $options);
709 $stack[] = array($mode, $options);
714 * Pop the last error handler used
716 * @return bool Always true
718 * @see PEAR::pushErrorHandling
720 protected static function _popErrorHandling($object)
722 $stack = &$GLOBALS['_PEAR_error_handler_stack'];
724 list($mode, $options) = $stack[sizeof($stack) - 1];
726 if ($object !== null) {
727 $object->setErrorHandling($mode, $options);
729 PEAR::setErrorHandling($mode, $options);
735 * OS independent PHP extension load. Remember to take care
736 * on the correct extension name for case sensitive OSes.
738 * @param string $ext The extension name
739 * @return bool Success or not on the dl() call
741 public static function loadExtension($ext)
743 if (extension_loaded($ext)) {
747 // if either returns true dl() will produce a FATAL error, stop that
749 function_exists('dl') === false ||
750 ini_get('enable_dl') != 1
757 } elseif (PHP_OS == 'HP-UX') {
759 } elseif (PHP_OS == 'AIX') {
761 } elseif (PHP_OS == 'OSX') {
767 return @dl('php_'.$ext.$suffix) || @dl($ext.$suffix);
771 function _PEAR_call_destructors()
773 global $_PEAR_destructor_object_list;
774 if (is_array($_PEAR_destructor_object_list) &&
775 sizeof($_PEAR_destructor_object_list))
777 reset($_PEAR_destructor_object_list);
779 $destructLifoExists = PEAR::getStaticProperty('PEAR', 'destructlifo');
781 if ($destructLifoExists) {
782 $_PEAR_destructor_object_list = array_reverse($_PEAR_destructor_object_list);
785 while (list($k, $objref) = each($_PEAR_destructor_object_list)) {
786 $classname = get_class($objref);
788 $destructor = "_$classname";
789 if (method_exists($objref, $destructor)) {
790 $objref->$destructor();
793 $classname = get_parent_class($classname);
797 // Empty the object list to ensure that destructors are
798 // not called more than once.
799 $_PEAR_destructor_object_list = array();
802 // Now call the shutdown functions
804 isset($GLOBALS['_PEAR_shutdown_funcs']) &&
805 is_array($GLOBALS['_PEAR_shutdown_funcs']) &&
806 !empty($GLOBALS['_PEAR_shutdown_funcs'])
808 foreach ($GLOBALS['_PEAR_shutdown_funcs'] as $value) {
809 call_user_func_array($value[0], $value[1]);
815 * Standard PEAR error class for PHP 4
817 * This class is supserseded by {@link PEAR_Exception} in PHP 5
821 * @author Stig Bakken <ssb@php.net>
822 * @author Tomas V.V. Cox <cox@idecnet.com>
823 * @author Gregory Beaver <cellog@php.net>
824 * @copyright 1997-2006 The PHP Group
825 * @license http://opensource.org/licenses/bsd-license.php New BSD License
826 * @version Release: 1.10.1
827 * @link http://pear.php.net/manual/en/core.pear.pear-error.php
828 * @see PEAR::raiseError(), PEAR::throwError()
829 * @since Class available since PHP 4.0.2
833 var $error_message_prefix = '';
834 var $mode = PEAR_ERROR_RETURN;
835 var $level = E_USER_NOTICE;
839 var $backtrace = null;
842 * PEAR_Error constructor
844 * @param string $message message
846 * @param int $code (optional) error code
848 * @param int $mode (optional) error mode, one of: PEAR_ERROR_RETURN,
849 * PEAR_ERROR_PRINT, PEAR_ERROR_DIE, PEAR_ERROR_TRIGGER,
850 * PEAR_ERROR_CALLBACK or PEAR_ERROR_EXCEPTION
852 * @param mixed $options (optional) error level, _OR_ in the case of
853 * PEAR_ERROR_CALLBACK, the callback function or object/method
856 * @param string $userinfo (optional) additional user/debug info
861 function __construct($message = 'unknown error', $code = null,
862 $mode = null, $options = null, $userinfo = null)
864 if ($mode === null) {
865 $mode = PEAR_ERROR_RETURN;
867 $this->message = $message;
870 $this->userinfo = $userinfo;
872 $skiptrace = PEAR::getStaticProperty('PEAR_Error', 'skiptrace');
875 $this->backtrace = debug_backtrace();
876 if (isset($this->backtrace[0]) && isset($this->backtrace[0]['object'])) {
877 unset($this->backtrace[0]['object']);
881 if ($mode & PEAR_ERROR_CALLBACK) {
882 $this->level = E_USER_NOTICE;
883 $this->callback = $options;
885 if ($options === null) {
886 $options = E_USER_NOTICE;
889 $this->level = $options;
890 $this->callback = null;
893 if ($this->mode & PEAR_ERROR_PRINT) {
894 if (is_null($options) || is_int($options)) {
900 printf($format, $this->getMessage());
903 if ($this->mode & PEAR_ERROR_TRIGGER) {
904 trigger_error($this->getMessage(), $this->level);
907 if ($this->mode & PEAR_ERROR_DIE) {
908 $msg = $this->getMessage();
909 if (is_null($options) || is_int($options)) {
911 if (substr($msg, -1) != "\n") {
917 die(sprintf($format, $msg));
920 if ($this->mode & PEAR_ERROR_CALLBACK && is_callable($this->callback)) {
921 call_user_func($this->callback, $this);
924 if ($this->mode & PEAR_ERROR_EXCEPTION) {
925 trigger_error("PEAR_ERROR_EXCEPTION is obsolete, use class PEAR_Exception for exceptions", E_USER_WARNING);
926 eval('$e = new Exception($this->message, $this->code);throw($e);');
931 * Only here for backwards compatibility.
933 * Class "Cache_Error" still uses it, among others.
935 * @param string $message Message
936 * @param int $code Error code
937 * @param int $mode Error mode
938 * @param mixed $options See __construct()
939 * @param string $userinfo Additional user/debug info
941 public function PEAR_Error(
942 $message = 'unknown error', $code = null, $mode = null,
943 $options = null, $userinfo = null
945 self::__construct($message, $code, $mode, $options, $userinfo);
949 * Get the error mode from an error object.
951 * @return int error mode
960 * Get the callback function/method from an error object.
962 * @return mixed callback function or object/method array
965 function getCallback()
967 return $this->callback;
971 * Get the error message from an error object.
973 * @return string full error message
976 function getMessage()
978 return ($this->error_message_prefix . $this->message);
982 * Get error code from an error object
984 * @return int error code
993 * Get the name of this error/exception.
995 * @return string error/exception name (type)
1000 return get_class($this);
1004 * Get additional user-supplied information.
1006 * @return string user-supplied information
1009 function getUserInfo()
1011 return $this->userinfo;
1015 * Get additional debug information supplied by the application.
1017 * @return string debug information
1020 function getDebugInfo()
1022 return $this->getUserInfo();
1026 * Get the call backtrace from where the error was generated.
1027 * Supported with PHP 4.3.0 or newer.
1029 * @param int $frame (optional) what frame to fetch
1030 * @return array Backtrace, or NULL if not available.
1033 function getBacktrace($frame = null)
1035 if (defined('PEAR_IGNORE_BACKTRACE')) {
1038 if ($frame === null) {
1039 return $this->backtrace;
1041 return $this->backtrace[$frame];
1044 function addUserInfo($info)
1046 if (empty($this->userinfo)) {
1047 $this->userinfo = $info;
1049 $this->userinfo .= " ** $info";
1053 function __toString()
1055 return $this->getMessage();
1059 * Make a string representation of this object.
1061 * @return string a string with an object summary
1067 $levels = array(E_USER_NOTICE => 'notice',
1068 E_USER_WARNING => 'warning',
1069 E_USER_ERROR => 'error');
1070 if ($this->mode & PEAR_ERROR_CALLBACK) {
1071 if (is_array($this->callback)) {
1072 $callback = (is_object($this->callback[0]) ?
1073 strtolower(get_class($this->callback[0])) :
1074 $this->callback[0]) . '::' .
1077 $callback = $this->callback;
1079 return sprintf('[%s: message="%s" code=%d mode=callback '.
1080 'callback=%s prefix="%s" info="%s"]',
1081 strtolower(get_class($this)), $this->message, $this->code,
1082 $callback, $this->error_message_prefix,
1085 if ($this->mode & PEAR_ERROR_PRINT) {
1088 if ($this->mode & PEAR_ERROR_TRIGGER) {
1089 $modes[] = 'trigger';
1091 if ($this->mode & PEAR_ERROR_DIE) {
1094 if ($this->mode & PEAR_ERROR_RETURN) {
1095 $modes[] = 'return';
1097 return sprintf('[%s: message="%s" code=%d mode=%s level=%s '.
1098 'prefix="%s" info="%s"]',
1099 strtolower(get_class($this)), $this->message, $this->code,
1100 implode("|", $modes), $levels[$this->level],
1101 $this->error_message_prefix,