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* @author Stig Bakken * @author Tomas V.V.Cox * @author Greg Beaver * @copyright 1997-2010 The Authors * @license http://opensource.org/licenses/bsd-license.php New BSD License * @link http://pear.php.net/package/PEAR * @since File available since Release 0.1 */ /**#@+ * ERROR constants */ define('PEAR_ERROR_RETURN', 1); define('PEAR_ERROR_PRINT', 2); define('PEAR_ERROR_TRIGGER', 4); define('PEAR_ERROR_DIE', 8); define('PEAR_ERROR_CALLBACK', 16); /** * WARNING: obsolete * @deprecated */ define('PEAR_ERROR_EXCEPTION', 32); /**#@-*/ if (substr(PHP_OS, 0, 3) == 'WIN') { define('OS_WINDOWS', true); define('OS_UNIX', false); define('PEAR_OS', 'Windows'); } else { define('OS_WINDOWS', false); define('OS_UNIX', true); define('PEAR_OS', 'Unix'); // blatant assumption } $GLOBALS['_PEAR_default_error_mode'] = PEAR_ERROR_RETURN; $GLOBALS['_PEAR_default_error_options'] = E_USER_NOTICE; $GLOBALS['_PEAR_destructor_object_list'] = array(); $GLOBALS['_PEAR_shutdown_funcs'] = array(); $GLOBALS['_PEAR_error_handler_stack'] = array(); @ini_set('track_errors', true); /** * Base class for other PEAR classes. Provides rudimentary * emulation of destructors. * * If you want a destructor in your class, inherit PEAR and make a * destructor method called _yourclassname (same name as the * constructor, but with a "_" prefix). Also, in your constructor you * have to call the PEAR constructor: $this->PEAR();. * The destructor method will be called without parameters. Note that * at in some SAPI implementations (such as Apache), any output during * the request shutdown (in which destructors are called) seems to be * discarded. If you need to get any debug information from your * destructor, use error_log(), syslog() or something similar. * * IMPORTANT! To use the emulated destructors you need to create the * objects by reference: $obj =& new PEAR_child; * * @category pear * @package PEAR * @author Stig Bakken * @author Tomas V.V. Cox * @author Greg Beaver * @copyright 1997-2006 The PHP Group * @license http://opensource.org/licenses/bsd-license.php New BSD License * @version Release: 1.10.15 * @link http://pear.php.net/package/PEAR * @see PEAR_Error * @since Class available since PHP 4.0.2 * @link http://pear.php.net/manual/en/core.pear.php#core.pear.pear */ class PEAR { /** * Whether to enable internal debug messages. * * @var bool * @access private */ var $_debug = false; /** * Default error mode for this object. * * @var int * @access private */ var $_default_error_mode = null; /** * Default error options used for this object when error mode * is PEAR_ERROR_TRIGGER. * * @var int * @access private */ var $_default_error_options = null; /** * Default error handler (callback) for this object, if error mode is * PEAR_ERROR_CALLBACK. * * @var string * @access private */ var $_default_error_handler = ''; /** * Which class to use for error objects. * * @var string * @access private */ var $_error_class = 'PEAR_Error'; /** * An array of expected errors. * * @var array * @access private */ var $_expected_errors = array(); /** * List of methods that can be called both statically and non-statically. * @var array */ protected static $bivalentMethods = array( 'setErrorHandling' => true, 'raiseError' => true, 'throwError' => true, 'pushErrorHandling' => true, 'popErrorHandling' => true, ); /** * Constructor. Registers this object in * $_PEAR_destructor_object_list for destructor emulation if a * destructor object exists. * * @param string $error_class (optional) which class to use for * error objects, defaults to PEAR_Error. * @access public * @return void */ function __construct($error_class = null) { $classname = strtolower(get_class($this)); if ($this->_debug) { print "PEAR constructor called, class=$classname\n"; } if ($error_class !== null) { $this->_error_class = $error_class; } while ($classname && strcasecmp($classname, "pear")) { $destructor = "_$classname"; if (method_exists($this, $destructor)) { global $_PEAR_destructor_object_list; $_PEAR_destructor_object_list[] = $this; if (!isset($GLOBALS['_PEAR_SHUTDOWN_REGISTERED'])) { register_shutdown_function("_PEAR_call_destructors"); $GLOBALS['_PEAR_SHUTDOWN_REGISTERED'] = true; } break; } else { $classname = get_parent_class($classname); } } } /** * Only here for backwards compatibility. * E.g. Archive_Tar calls $this->PEAR() in its constructor. * * @param string $error_class Which class to use for error objects, * defaults to PEAR_Error. */ public function PEAR($error_class = null) { self::__construct($error_class); } /** * Destructor (the emulated type of...). Does nothing right now, * but is included for forward compatibility, so subclass * destructors should always call it. * * See the note in the class desciption about output from * destructors. * * @access public * @return void */ function _PEAR() { if ($this->_debug) { printf("PEAR destructor called, class=%s\n", strtolower(get_class($this))); } } public function __call($method, $arguments) { if (!isset(self::$bivalentMethods[$method])) { trigger_error( 'Call to undefined method PEAR::' . $method . '()', E_USER_ERROR ); } return call_user_func_array( array(__CLASS__, '_' . $method), array_merge(array($this), $arguments) ); } public static function __callStatic($method, $arguments) { if (!isset(self::$bivalentMethods[$method])) { trigger_error( 'Call to undefined method PEAR::' . $method . '()', E_USER_ERROR ); } return call_user_func_array( array(__CLASS__, '_' . $method), array_merge(array(null), $arguments) ); } /** * If you have a class that's mostly/entirely static, and you need static * properties, you can use this method to simulate them. Eg. in your method(s) * do this: $myVar = &PEAR::getStaticProperty('myclass', 'myVar'); * You MUST use a reference, or they will not persist! * * @param string $class The calling classname, to prevent clashes * @param string $var The variable to retrieve. * @return mixed A reference to the variable. If not set it will be * auto initialised to NULL. */ public static function &getStaticProperty($class, $var) { static $properties; if (!isset($properties[$class])) { $properties[$class] = array(); } if (!array_key_exists($var, $properties[$class])) { $properties[$class][$var] = null; } return $properties[$class][$var]; } /** * Use this function to register a shutdown method for static * classes. * * @param mixed $func The function name (or array of class/method) to call * @param mixed $args The arguments to pass to the function * * @return void */ public static function registerShutdownFunc($func, $args = array()) { // if we are called statically, there is a potential // that no shutdown func is registered. Bug #6445 if (!isset($GLOBALS['_PEAR_SHUTDOWN_REGISTERED'])) { register_shutdown_function("_PEAR_call_destructors"); $GLOBALS['_PEAR_SHUTDOWN_REGISTERED'] = true; } $GLOBALS['_PEAR_shutdown_funcs'][] = array($func, $args); } /** * Tell whether a value is a PEAR error. * * @param mixed $data the value to test * @param int $code if $data is an error object, return true * only if $code is a string and * $obj->getMessage() == $code or * $code is an integer and $obj->getCode() == $code * * @return bool true if parameter is an error */ public static function isError($data, $code = null) { if (!is_a($data, 'PEAR_Error')) { return false; } if (is_null($code)) { return true; } elseif (is_string($code)) { return $data->getMessage() == $code; } return $data->getCode() == $code; } /** * Sets how errors generated by this object should be handled. * Can be invoked both in objects and statically. If called * statically, setErrorHandling sets the default behaviour for all * PEAR objects. If called in an object, setErrorHandling sets * the default behaviour for that object. * * @param object $object * Object the method was called on (non-static mode) * * @param int $mode * One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT, * PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE, * PEAR_ERROR_CALLBACK or PEAR_ERROR_EXCEPTION. * * @param mixed $options * When $mode is PEAR_ERROR_TRIGGER, this is the error level (one * of E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR). * * When $mode is PEAR_ERROR_CALLBACK, this parameter is expected * to be the callback function or method. A callback * function is a string with the name of the function, a * callback method is an array of two elements: the element * at index 0 is the object, and the element at index 1 is * the name of the method to call in the object. * * When $mode is PEAR_ERROR_PRINT or PEAR_ERROR_DIE, this is * a printf format string used when printing the error * message. * * @access public * @return void * @see PEAR_ERROR_RETURN * @see PEAR_ERROR_PRINT * @see PEAR_ERROR_TRIGGER * @see PEAR_ERROR_DIE * @see PEAR_ERROR_CALLBACK * @see PEAR_ERROR_EXCEPTION * * @since PHP 4.0.5 */ protected static function _setErrorHandling( $object, $mode = null, $options = null ) { if ($object !== null) { $setmode = &$object->_default_error_mode; $setoptions = &$object->_default_error_options; } else { $setmode = &$GLOBALS['_PEAR_default_error_mode']; $setoptions = &$GLOBALS['_PEAR_default_error_options']; } switch ($mode) { case PEAR_ERROR_EXCEPTION: case PEAR_ERROR_RETURN: case PEAR_ERROR_PRINT: case PEAR_ERROR_TRIGGER: case PEAR_ERROR_DIE: case null: $setmode = $mode; $setoptions = $options; break; case PEAR_ERROR_CALLBACK: $setmode = $mode; // class/object method callback if (is_callable($options)) { $setoptions = $options; } else { trigger_error("invalid error callback", E_USER_WARNING); } break; default: trigger_error("invalid error mode", E_USER_WARNING); break; } } /** * This method is used to tell which errors you expect to get. * Expected errors are always returned with error mode * PEAR_ERROR_RETURN. Expected error codes are stored in a stack, * and this method pushes a new element onto it. The list of * expected errors are in effect until they are popped off the * stack with the popExpect() method. * * Note that this method can not be called statically * * @param mixed $code a single error code or an array of error codes to expect * * @return int the new depth of the "expected errors" stack * @access public */ function expectError($code = '*') { if (is_array($code)) { array_push($this->_expected_errors, $code); } else { array_push($this->_expected_errors, array($code)); } return count($this->_expected_errors); } /** * This method pops one element off the expected error codes * stack. * * @return array the list of error codes that were popped */ function popExpect() { return array_pop($this->_expected_errors); } /** * This method checks unsets an error code if available * * @param mixed error code * @return bool true if the error code was unset, false otherwise * @access private * @since PHP 4.3.0 */ function _checkDelExpect($error_code) { $deleted = false; foreach ($this->_expected_errors as $key => $error_array) { if (in_array($error_code, $error_array)) { unset($this->_expected_errors[$key][array_search($error_code, $error_array)]); $deleted = true; } // clean up empty arrays if (0 == count($this->_expected_errors[$key])) { unset($this->_expected_errors[$key]); } } return $deleted; } /** * This method deletes all occurrences of the specified element from * the expected error codes stack. * * @param mixed $error_code error code that should be deleted * @return mixed list of error codes that were deleted or error * @access public * @since PHP 4.3.0 */ function delExpect($error_code) { $deleted = false; if ((is_array($error_code) && (0 != count($error_code)))) { // $error_code is a non-empty array here; we walk through it trying // to unset all values foreach ($error_code as $key => $error) { $deleted = $this->_checkDelExpect($error) ? true : false; } return $deleted ? true : PEAR::raiseError("The expected error you submitted does not exist"); // IMPROVE ME } elseif (!empty($error_code)) { // $error_code comes alone, trying to unset it if ($this->_checkDelExpect($error_code)) { return true; } return PEAR::raiseError("The expected error you submitted does not exist"); // IMPROVE ME } // $error_code is empty return PEAR::raiseError("The expected error you submitted is empty"); // IMPROVE ME } /** * This method is a wrapper that returns an instance of the * configured error class with this object's default error * handling applied. If the $mode and $options parameters are not * specified, the object's defaults are used. * * @param mixed $message a text error message or a PEAR error object * * @param int $code a numeric error code (it is up to your class * to define these if you want to use codes) * * @param int $mode One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT, * PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE, * PEAR_ERROR_CALLBACK, PEAR_ERROR_EXCEPTION. * * @param mixed $options If $mode is PEAR_ERROR_TRIGGER, this parameter * specifies the PHP-internal error level (one of * E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR). * If $mode is PEAR_ERROR_CALLBACK, this * parameter specifies the callback function or * method. In other error modes this parameter * is ignored. * * @param string $userinfo If you need to pass along for example debug * information, this parameter is meant for that. * * @param string $error_class The returned error object will be * instantiated from this class, if specified. * * @param bool $skipmsg If true, raiseError will only pass error codes, * the error message parameter will be dropped. * * @return object a PEAR error object * @see PEAR::setErrorHandling * @since PHP 4.0.5 */ protected static function _raiseError($object, $message = null, $code = null, $mode = null, $options = null, $userinfo = null, $error_class = null, $skipmsg = false) { // The error is yet a PEAR error object if (is_object($message)) { $code = $message->getCode(); $userinfo = $message->getUserInfo(); $error_class = $message->getType(); $message->error_message_prefix = ''; $message = $message->getMessage(); } if ( $object !== null && isset($object->_expected_errors) && count($object->_expected_errors) > 0 && count($exp = end($object->_expected_errors)) ) { if ($exp[0] === "*" || (is_int(reset($exp)) && in_array($code, $exp)) || (is_string(reset($exp)) && in_array($message, $exp)) ) { $mode = PEAR_ERROR_RETURN; } } // No mode given, try global ones if ($mode === null) { // Class error handler if ($object !== null && isset($object->_default_error_mode)) { $mode = $object->_default_error_mode; $options = $object->_default_error_options; // Global error handler } elseif (isset($GLOBALS['_PEAR_default_error_mode'])) { $mode = $GLOBALS['_PEAR_default_error_mode']; $options = $GLOBALS['_PEAR_default_error_options']; } } if ($error_class !== null) { $ec = $error_class; } elseif ($object !== null && isset($object->_error_class)) { $ec = $object->_error_class; } else { $ec = 'PEAR_Error'; } if ($skipmsg) { $a = new $ec($code, $mode, $options, $userinfo); } else { $a = new $ec($message, $code, $mode, $options, $userinfo); } return $a; } /** * Simpler form of raiseError with fewer options. In most cases * message, code and userinfo are enough. * * @param mixed $message a text error message or a PEAR error object * * @param int $code a numeric error code (it is up to your class * to define these if you want to use codes) * * @param string $userinfo If you need to pass along for example debug * information, this parameter is meant for that. * * @return object a PEAR error object * @see PEAR::raiseError */ protected static function _throwError($object, $message = null, $code = null, $userinfo = null) { if ($object !== null) { $a = $object->raiseError($message, $code, null, null, $userinfo); return $a; } $a = PEAR::raiseError($message, $code, null, null, $userinfo); return $a; } public static function staticPushErrorHandling($mode, $options = null) { $stack = &$GLOBALS['_PEAR_error_handler_stack']; $def_mode = &$GLOBALS['_PEAR_default_error_mode']; $def_options = &$GLOBALS['_PEAR_default_error_options']; $stack[] = array($def_mode, $def_options); switch ($mode) { case PEAR_ERROR_EXCEPTION: case PEAR_ERROR_RETURN: case PEAR_ERROR_PRINT: case PEAR_ERROR_TRIGGER: case PEAR_ERROR_DIE: case null: $def_mode = $mode; $def_options = $options; break; case PEAR_ERROR_CALLBACK: $def_mode = $mode; // class/object method callback if (is_callable($options)) { $def_options = $options; } else { trigger_error("invalid error callback", E_USER_WARNING); } break; default: trigger_error("invalid error mode", E_USER_WARNING); break; } $stack[] = array($mode, $options); return true; } public static function staticPopErrorHandling() { $stack = &$GLOBALS['_PEAR_error_handler_stack']; $setmode = &$GLOBALS[