| // | Stig Bakken | // | Tomas V.V.Cox | // +--------------------------------------------------------------------+ // // $Id: PEAR.php,v 1.82.2.2 2005/08/22 22:04:58 cellog Exp $ // 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); define('PEAR_ZE2', (function_exists('version_compare') && version_compare(zend_version(), "2-dev", "ge"))); 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 } // instant backwards compatibility if (!defined('PATH_SEPARATOR')) { if (OS_WINDOWS) { define('PATH_SEPARATOR', ';'); } else { define('PATH_SEPARATOR', ':'); } } $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; * * @since PHP 4.0.2 * @author Stig Bakken * @see http://pear.php.net/manual/ */ class PEAR { // {{{ properties /** * 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(); // }}} // {{{ constructor /** * Constructor. Registers this object in * $_PEAR_destructor_object_list for destructor emulation if a * destructor object exists. * * @param string $error_class (optional) which class to use for * error objects, defaults to PEAR_Error. * @access public * @return void */ function PEAR($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); } } } // }}} // {{{ destructor /** * 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))); } } // }}} // {{{ getStaticProperty() /** * 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! * * @access public * @param string $class The calling classname, to prevent clashes * @param string $var The variable to retrieve. * @return mixed A reference to the variable. If not set it will be * auto initialised to NULL. */ function &getStaticProperty($class, $var) { static $properties; return $properties[$class][$var]; } // }}} // {{{ registerShutdownFunc() /** * Use this function to register a shutdown method for static * classes. * * @access public * @param mixed $func The function name (or array of class/method) to call * @param mixed $args The arguments to pass to the function * @return void */ function registerShutdownFunc($func, $args = array()) { $GLOBALS['_PEAR_shutdown_funcs'][] = array($func, $args); } // }}} // {{{ isError() /** * 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() == $code * @access public * @return bool true if parameter is an error */ function isError($data, $code = null) { if (is_a($data, 'PEAR_Error')) { if (is_null($code)) { return true; } elseif (is_string($code)) { return $data->getMessage() == $code; } else { return $data->getCode() == $code; } } return false; } // }}} // {{{ setErrorHandling() /** * 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 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 $mode is PEAR_ERROR_PRINT or PEAR_ERROR_DIE, this is * a printf format string used when printing the error * message. * * @access public * @return void * @see PEAR_ERROR_RETURN * @see PEAR_ERROR_PRINT * @see PEAR_ERROR_TRIGGER * @see PEAR_ERROR_DIE * @see PEAR_ERROR_CALLBACK * @see PEAR_ERROR_EXCEPTION * * @since PHP 4.0.5 */ function setErrorHandling($mode = null, $options = null) { if (isset($this) && is_a($this, 'PEAR')) { $setmode = &$this->_default_error_mode; $setoptions = &$this->_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; } } // }}} // {{{ expectError() /** * 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($code)); } return sizeof($this->_expected_errors); } // }}} // {{{ popExpect() /** * 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($this->_expected_errors); } // }}} // {{{ _checkDelExpect() /** * This method checks unsets an error code if available * * @param mixed error code * @return bool true if the error code was unset, false otherwise * @access private * @since PHP 4.3.0 */ function _checkDelExpect($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; } // }}} // {{{ delExpect() /** * This method deletes all occurences 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 => $error) { if ($this->_checkDelExpect($error)) { $deleted = true; } else { $deleted = 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; } else { return PEAR::raiseError("The expected error you submitted does not exist"); // IMPROVE ME } } else { // $error_code is empty return PEAR::raiseError("The expected error you submitted is empty"); // IMPROVE ME } } // }}} // {{{ raiseError() /** * 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 $skipmsg If true, raiseError will only pass error codes, * the error message parameter will be dropped. * * @access public * @return object a PEAR error object * @see PEAR::setErrorHandling * @since PHP 4.0.5 */ function &raiseError($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 = $message->getMessage(); } if (isset($this) && isset($this->_expected_errors) && sizeof($this->_expected_errors) > 0 && sizeof($exp = end($this->_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 (isset($this) && isset($this->_default_error_mode)) { $mode = $this->_default_error_mode; $options = $this->_default_error_options; // Global error handler } elseif (isset($GLOBALS['_PEAR_default_error_mode'])) { $mode = $GLOBALS['_PEAR_default_error_mode']; $options = $GLOBALS['_PEAR_default_error_options']; } } if ($error_class !== null) { $ec = $error_class; } elseif (isset($this) && isset($this->_error_class)) { $ec = $this->_error_class; } else { $ec = 'PEAR_Error'; } if ($skipmsg) { $a = &new $ec($code, $mode, $options, $userinfo); return $a; } else { $a = &new $ec($message, $code, $mode, $options, $userinfo); return $a; } } // }}} // {{{ throwError() /** * Simpler form of raiseError with fewer options. In most cases * message, code and userinfo are enough. * * @param string $message * */ function throwError($message = null, $code = null, $userinfo = null) { if (isset($this) && is_a($this, 'PEAR')) { $a = &$this->raiseError($message, $code, null, null, $userinfo); return $a; } else { $a = &PEAR::raiseError($message, $code, null, null, $userinfo); return $a; } } // }}} function staticPushErrorHandling($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; } function staticPopErrorHandling() { $stack = &$GLOBALS['_PEAR_error_handler_stack']; $setmode = &$GLOBALS['_PEAR_default_error_mode']; $setoptions = &$GLOBALS['_PEAR_default_error_options']; array_pop($stack); list($mode, $options) = $stack[sizeof($stack) - 1]; array_pop($stack); switch ($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; } return true; } // {{{ pushErrorHandling() /** * Push a new error handler on top of the error handler options stack. With this * you can easily override the actual error handler for some code and restore * it later with popErrorHandling. * * @param mixed $mode (same as setErrorHandling) * @param mixed $options (same as setErrorHandling) * * @return bool Always true * * @see PEAR::setErrorHandling */ function pushErrorHandling($mode, $options = null) { $stack = &$GLOBALS['_PEAR_error_handler_stack']; if (isset($this) && is_a($this, 'PEAR')) { $def_mode = &$this->_default_error_mode; $def_options = &$this->_default_error_options; } else { $def_mode = &$GLOBALS['_PEAR_default_error_mode']; $def_options = &$GLOBALS['_PEAR_default_error_options']; } $stack[] = array($def_mode, $def_options); if (isset($this) && is_a($this, 'PEAR')) { $this->setErrorHandling($mode, $options); } else { PEAR::setErrorHandling($mode, $options); } $stack[] = array($mode, $options); return true; } // }}} // {{{ popErrorHandling() /** * Pop the last error handler used * * @return bool Always true * * @see PEAR::pushErrorHandling */ function popErrorHandling() { $stack = &$GLOBALS['_PEAR_error_handler_stack']; array_pop($stack); list($mode, $options) = $stack[sizeof($stack) - 1]; array_pop($stack); if (isset($this) && is_a($this, 'PEAR')) { $this->setErrorHandling($mode, $options); } else { PEAR::setErrorHandling($mode, $options); } return true; } // }}} // {{{ loadExtension() /** * OS independant PHP extension load. Remember to take care * on the correct extension name for case sensitive OSes. * * @param string $ext The extension name * @return bool Success or not on the dl() call */ function loadExtension($ext) { if (!extension_loaded($ext)) { // if either returns true dl() will produce a FATAL error, stop that if ((ini_get('enable_dl') != 1) || (ini_get('safe_mode') == 1)) { return false; } if (OS_WINDOWS) { $suffix = '.dll'; } elseif (PHP_OS == 'HP-UX') { $suffix = '.sl'; } elseif (PHP_OS == 'AIX') { $suffix = '.a'; } elseif (PHP_OS == 'OSX') { $suffix = '.bundle'; } else { $suffix = '.so'; } return @dl('php_'.$ext.$suffix) || @dl($ext.$suffix); } return true; } // }}} } // {{{ _PEAR_call_destructors() function _PEAR_call_destructors() { global $_PEAR_destructor_object_list; if (is_array($_PEAR_destructor_object_list) && sizeof($_PEAR_destructor_object_list)) { reset($_PEAR_destructor_object_list); if (@PEAR::getStaticProperty('PEAR', 'destructlifo')) { $_PEAR_destructor_object_list = array_reverse($_PEAR_destructor_object_list); } while (list($k, $objref) = each($_PEAR_destructor_object_list)) { $classname = get_class($objref); while ($classname) { $destructor = "_$classname"; if (method_exists($objref, $destructor)) { $objref->$destructor(); break; } else { $classname = get_parent_class($classname); } } } // Empty the object list to ensure that destructors are // not called more than once. $_PEAR_destructor_object_list = array(); } // Now call the shutdown functions if (is_array($GLOBALS['_PEAR_shutdown_funcs']) AND !empty($GLOBALS['_PEAR_shutdown_funcs'])) { foreach ($GLOBALS['_PEAR_shutdown_funcs'] as $value) { call_user_func_array($value[0], $value[1]); } } } // }}} class PEAR_Error { // {{{ properties var $error_message_prefix = ''; var $mode = PEAR_ERROR_RETURN; var $level = E_USER_NOTICE; var $code = -1; var $message = ''; var $userinfo = ''; var $backtrace = null; // }}} // {{{ constructor /** * PEAR_Error constructor * * @param string $message message * * @param int $code (optional) error code * * @param int $mode (optional) error mode, one of: PEAR_ERROR_RETURN, * PEAR_ERROR_PRINT, PEAR_ERROR_DIE, PEAR_ERROR_TRIGGER, * PEAR_ERROR_CALLBACK or PEAR_ERROR_EXCEPTION * * @param mixed $options (optional) error level, _OR_ in the case of * PEAR_ERROR_CALLBACK, the callback function or object/method * tuple. * * @param string $userinfo (optional) additional user/debug info * * @access public * */ function PEAR_Error($message = 'unknown error', $code = null, $mode = null, $options = null, $userinfo = null) { if ($mode === null) { $mode = PEAR_ERROR_RETURN; } $this->message = $message; $this->code = $code; $this->mode = $mode; $this->userinfo = $userinfo; if (function_exists("debug_backtrace")) { if (@!PEAR::getStaticProperty('PEAR_Error', 'skiptrace')) { $this->backtrace = debug_backtrace(); } } if ($mode & PEAR_ERROR_CALLBACK) { $this->level = E_USER_NOTICE; $this->callback = $options; } else { if ($options === null) { $options = E_USER_NOTICE; } $this->level = $options; $this->callback = null; } if ($this->mode & PEAR_ERROR_PRINT) { if (is_null($options) || is_int($options)) { $format = "%s"; } else { $format = $options; } printf($format, $this->getMessage()); } if ($this->mode & PEAR_ERROR_TRIGGER) { trigger_error($this->getMessage(), $this->level); } if ($this->mode & PEAR_ERROR_DIE) { $msg = $this->getMessage(); if (is_null($options) || is_int($options)) { $format = "%s"; if (substr($msg, -1) != "\n") { $msg .= "\n"; } } else { $format = $options; } die(sprintf($format, $msg)); } if ($this->mode & PEAR_ERROR_CALLBACK) { if (is_callable($this->callback)) { call_user_func($this->callback, $this); } } if ($this->mode & PEAR_ERROR_EXCEPTION) { trigger_error("PEAR_ERROR_EXCEPTION is obsolete, use class PEAR_ErrorStack for exceptions", E_USER_WARNING); eval('$e = new Exception($this->message, $this->code);$e->PEAR_Error = $this;throw($e);'); } } // }}} // {{{ getMode() /** * Get the error mode from an error object. * * @return int error mode * @access public */ function getMode() { return $this->mode; } // }}} // {{{ getCallback() /** * Get the callback function/method from an error object. * * @return mixed callback function or object/method array * @access public */ function getCallback() { return $this->callback; } // }}} // {{{ getMessage() /** * Get the error message from an error object. * * @return string full error message * @access public */ function getMessage() { return ($this->error_message_prefix . $this->message); } // }}} // {{{ getCode() /** * Get error code from an error object * * @return int error code * @access public */ function getCode() { return $this->code; } // }}} // {{{ getType() /** * Get the name of this error/exception. * * @return string error/exception name (type) * @access public */ function getType() { return get_class($this); } // }}} // {{{ getUserInfo() /** * Get additional user-supplied information. * * @return string user-supplied information * @access public */ function getUserInfo() { return $this->userinfo; } // }}} // {{{ getDebugInfo() /** * Get additional debug information supplied by the application. * * @return string debug information * @access public */ function getDebugInfo() { return $this->getUserInfo(); } // }}} // {{{ getBacktrace() /** * Get the call backtrace from where the error was generated. * Supported with PHP 4.3.0 or newer. * * @param int $frame (optional) what frame to fetch * @return array Backtrace, or NULL if not available. * @access public */ function getBacktrace($frame = null) { if ($frame === null) { return $this->backtrace; } return $this->backtrace[$frame]; } // }}} // {{{ addUserInfo() function addUserInfo($info) { if (empty($this->userinfo)) { $this->userinfo = $info; } else { $this->userinfo .= " ** $info"; } } // }}} // {{{ toString() /** * Make a string representation of this object. * * @return string a string with an object summary * @access public */ function toString() { $modes = array(); $levels = array(E_USER_NOTICE => 'notice', E_USER_WARNING => 'warning', E_USER_ERROR => 'error'); if ($this->mode & PEAR_ERROR_CALLBACK) { if (is_array($this->callback)) { $callback = (is_object($this->callback[0]) ? strtolower(get_class($this->callback[0])) : $this->callback[0]) . '::' . $this->callback[1]; } else { $callback = $this->callback; } return sprintf('[%s: message="%s" code=%d mode=callback '. 'callback=%s prefix="%s" info="%s"]', strtolower(get_class($this)), $this->message, $this->code, $callback, $this->error_message_prefix, $this->userinfo); } if ($this->mode & PEAR_ERROR_PRINT) { $modes[] = 'print'; } if ($this->mode & PEAR_ERROR_TRIGGER) { $modes[] = 'trigger'; } if ($this->mode & PEAR_ERROR_DIE) { $modes[] = 'die'; } if ($this->mode & PEAR_ERROR_RETURN) { $modes[] = 'return'; } return sprintf('[%s: message="%s" code=%d mode=%s level=%s '. 'prefix="%s" info="%s"]', strtolower(get_class($this)), $this->message, $this->code, implode("|", $modes), $levels[$this->level], $this->error_message_prefix, $this->userinfo); } // }}} } /* * Local Variables: * mode: php * tab-width: 4 * c-basic-offset: 4 * End: */ ?>