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798 lines
24 KiB
PHP
798 lines
24 KiB
PHP
<?php
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//
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// +----------------------------------------------------------------------+
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// | PHP version 4.0 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2001 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.0 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/2_02.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Authors: Sterling Hughes <sterling@php.net> |
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// | Stig Bakken <ssb@fast.no> |
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// | Tomas V.V.Cox <cox@idecnet.com> |
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// | |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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//
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define('PEAR_ERROR_RETURN', 1);
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define('PEAR_ERROR_PRINT', 2);
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define('PEAR_ERROR_TRIGGER', 4);
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define('PEAR_ERROR_DIE', 8);
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define('PEAR_ERROR_CALLBACK', 16);
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if (substr(PHP_OS, 0, 3) == 'WIN') {
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define('OS_WINDOWS', true);
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define('OS_UNIX', false);
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define('PEAR_OS', 'Windows');
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} else {
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define('OS_WINDOWS', false);
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define('OS_UNIX', true);
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define('PEAR_OS', 'Unix'); // blatant assumption
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}
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$GLOBALS['_PEAR_default_error_mode'] = PEAR_ERROR_RETURN;
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$GLOBALS['_PEAR_default_error_options'] = E_USER_NOTICE;
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$GLOBALS['_PEAR_default_error_callback'] = '';
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$GLOBALS['_PEAR_destructor_object_list'] = array();
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//
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// Tests needed: - PEAR inheritance
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// - destructors
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//
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/**
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* Base class for other PEAR classes. Provides rudimentary
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* emulation of destructors.
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*
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* If you want a destructor in your class, inherit PEAR and make a
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* destructor method called _yourclassname (same name as the
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* constructor, but with a "_" prefix). Also, in your constructor you
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* have to call the PEAR constructor: $this->PEAR();.
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* The destructor method will be called without parameters. Note that
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* at in some SAPI implementations (such as Apache), any output during
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* the request shutdown (in which destructors are called) seems to be
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* discarded. If you need to get any debug information from your
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* destructor, use error_log(), syslog() or something similar.
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*
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* @since PHP 4.0.2
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* @author Stig Bakken <ssb@fast.no>
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*/
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class PEAR
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{
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// {{{ properties
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/**
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* Whether to enable internal debug messages.
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*
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* @var bool
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* @access private
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*/
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var $_debug = false;
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/**
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* Default error mode for this object.
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*
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* @var int
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* @access private
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*/
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var $_default_error_mode = null;
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/**
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* Default error options used for this object when error mode
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* is PEAR_ERROR_TRIGGER.
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*
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* @var int
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* @access private
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*/
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var $_default_error_options = null;
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/**
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* Default error handler (callback) for this object, if error mode is
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* PEAR_ERROR_CALLBACK.
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*
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* @var string
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* @access private
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*/
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var $_default_error_handler = '';
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/**
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* Which class to use for error objects.
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*
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* @var string
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* @access private
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*/
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var $_error_class = 'PEAR_Error';
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/**
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* An array of expected errors.
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*
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* @var array
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* @access private
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*/
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var $_expected_errors = array();
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// }}}
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// {{{ constructor
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/**
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* Constructor. Registers this object in
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* $_PEAR_destructor_object_list for destructor emulation if a
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* destructor object exists.
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*
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* @param string (optional) which class to use for error objects,
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* defaults to PEAR_Error.
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* @access public
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* @return void
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*/
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function PEAR($error_class = null)
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{
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$classname = get_class($this);
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if ($this->_debug) {
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print "PEAR constructor called, class=$classname\n";
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}
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if ($error_class !== null) {
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$this->_error_class = $error_class;
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}
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while ($classname) {
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$destructor = "_$classname";
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if (method_exists($this, $destructor)) {
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global $_PEAR_destructor_object_list;
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$_PEAR_destructor_object_list[] = &$this;
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break;
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} else {
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$classname = get_parent_class($classname);
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}
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}
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}
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// }}}
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// {{{ destructor
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/**
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* Destructor (the emulated type of...). Does nothing right now,
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* but is included for forward compatibility, so subclass
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* destructors should always call it.
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*
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* See the note in the class desciption about output from
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* destructors.
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*
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* @access public
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* @return void
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*/
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function _PEAR() {
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if ($this->_debug) {
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printf("PEAR destructor called, class=%s\n", get_class($this));
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}
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}
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// }}}
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// {{{ isError()
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/**
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* Tell whether a value is a PEAR error.
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*
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* @param mixed the value to test
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* @access public
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* @return bool true if parameter is an error
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*/
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function isError($data) {
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return (bool)(is_object($data) &&
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(get_class($data) == 'pear_error' ||
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is_subclass_of($data, 'pear_error')));
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}
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// }}}
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// {{{ setErrorHandling()
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/**
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* Sets how errors generated by this DB object should be handled.
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* Can be invoked both in objects and statically. If called
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* statically, setErrorHandling sets the default behaviour for all
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* PEAR objects. If called in an object, setErrorHandling sets
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* the default behaviour for that object.
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*
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* @param int $mode
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* One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT,
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* PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE or
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* PEAR_ERROR_CALLBACK.
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*
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* @param mixed $options
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* When $mode is PEAR_ERROR_TRIGGER, this is the error level (one
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* of E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR).
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*
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* When $mode is PEAR_ERROR_CALLBACK, this parameter is expected
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* to be the callback function or method. A callback
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* function is a string with the name of the function, a
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* callback method is an array of two elements: the element
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* at index 0 is the object, and the element at index 1 is
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* the name of the method to call in the object.
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*
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* When $mode is PEAR_ERROR_PRINT or PEAR_ERROR_DIE, this is
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* a printf format string used when printing the error
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* message.
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*
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* @access public
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* @return void
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* @see PEAR_ERROR_RETURN
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* @see PEAR_ERROR_PRINT
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* @see PEAR_ERROR_TRIGGER
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* @see PEAR_ERROR_DIE
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* @see PEAR_ERROR_CALLBACK
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*
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* @since PHP 4.0.5
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*/
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function setErrorHandling($mode = null, $options = null)
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{
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if (isset($this)) {
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$setmode = &$this->_default_error_mode;
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$setoptions = &$this->_default_error_options;
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//$setcallback = &$this->_default_error_callback;
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} else {
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$setmode = &$GLOBALS['_PEAR_default_error_mode'];
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$setoptions = &$GLOBALS['_PEAR_default_error_options'];
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//$setcallback = &$GLOBALS['_PEAR_default_error_callback'];
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}
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switch ($mode) {
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case PEAR_ERROR_RETURN:
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case PEAR_ERROR_PRINT:
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case PEAR_ERROR_TRIGGER:
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case PEAR_ERROR_DIE:
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case null:
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$setmode = $mode;
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$setoptions = $options;
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break;
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case PEAR_ERROR_CALLBACK:
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$setmode = $mode;
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if ((is_string($options) && function_exists($options)) ||
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(is_array($options) && method_exists(@$options[0], @$options[1])))
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{
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$setoptions = $options;
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} else {
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trigger_error("invalid error callback", E_USER_WARNING);
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}
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break;
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default:
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trigger_error("invalid error mode", E_USER_WARNING);
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break;
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}
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}
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// }}}
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// {{{ expectError()
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/**
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* This method is used to tell which errors you expect to get.
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* Expected errors are always returned with error mode
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* PEAR_ERROR_RETURN. Expected error codes are stored in a stack,
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* and this method pushes a new element onto it. The list of
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* expected errors are in effect until they are popped off the
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* stack with the popExpect() method.
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*
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* @param mixed a single error code or an array of error codes
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* to expect
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*
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* @return int the new depth of the "expected errors" stack
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*/
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function expectError($code)
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{
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if (is_array($code)) {
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array_push($this->_expected_errors, $code);
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} else {
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array_push($this->_expected_errors, array($code));
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}
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return sizeof($this->_expected_errors);
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}
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// }}}
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// {{{ popExpect()
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/**
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* This method pops one element off the expected error codes
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* stack.
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*
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* @return array the list of error codes that were popped
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*/
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function popExpect()
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{
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return array_pop($this->_expected_errors);
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}
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// }}}
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// {{{ raiseError()
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/**
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* This method is a wrapper that returns an instance of the
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* configured error class with this object's default error
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* handling applied. If the $mode and $options parameters are not
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* specified, the object's defaults are used.
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*
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* @param $message a text error message or a PEAR error object
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*
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* @param $code a numeric error code (it is up to your class
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* to define these if you want to use codes)
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*
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* @param $mode One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT,
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* PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE or
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* PEAR_ERROR_CALLBACK.
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*
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* @param $options If $mode is PEAR_ERROR_TRIGGER, this parameter
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* specifies the PHP-internal error level (one of
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* E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR).
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* If $mode is PEAR_ERROR_CALLBACK, this
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* parameter specifies the callback function or
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* method. In other error modes this parameter
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* is ignored.
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*
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* @param $userinfo If you need to pass along for example debug
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* information, this parameter is meant for that.
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*
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* @param $error_class The returned error object will be instantiated
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* from this class, if specified.
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*
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* @param $skipmsg If true, raiseError will only pass error codes,
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* the error message parameter will be dropped.
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*
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* @access public
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* @return object a PEAR error object
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* @see PEAR::setErrorHandling
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* @since PHP 4.0.5
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*/
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function &raiseError($message = null,
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$code = null,
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$mode = null,
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$options = null,
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$userinfo = null,
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$error_class = null,
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$skipmsg = false)
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{
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// The error is yet a PEAR error object
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if (is_object($message)) {
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$code = $message->getCode();
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$userinfo = $message->getUserInfo();
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$error_class = $message->getType();
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$message = $message->getMessage();
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}
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if (isset($this) && isset($this->_expected_errors) && sizeof($this->_expected_errors) > 0 && in_array($code, end($this->_expected_errors))) {
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$mode = PEAR_ERROR_RETURN;
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}
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if ($mode === null) {
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if (isset($this) && isset($this->_default_error_mode)) {
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$mode = $this->_default_error_mode;
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} else {
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$mode = $GLOBALS['_PEAR_default_error_mode'];
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}
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}
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if ($mode == PEAR_ERROR_TRIGGER && $options === null) {
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if (isset($this)) {
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if (isset($this->_default_error_options)) {
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$options = $this->_default_error_options;
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}
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} else {
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$options = $GLOBALS['_PEAR_default_error_options'];
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}
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}
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if ($mode == PEAR_ERROR_CALLBACK) {
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if (!is_string($options) &&
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!(is_array($options) && sizeof($options) == 2 &&
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is_object($options[0]) && is_string($options[1])))
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{
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if (isset($this) && isset($this->_default_error_options)) {
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$options = $this->_default_error_options;
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} else {
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$options = $GLOBALS['_PEAR_default_error_options'];
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}
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}
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} else {
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if ($options === null) {
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if (isset($this)) {
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if (isset($this->_default_error_options)) {
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$options = $this->_default_error_options;
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}
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} else {
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$options = $GLOBALS['_PEAR_default_error_options'];
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}
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}
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}
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if ($error_class !== null) {
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$ec = $error_class;
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} elseif (isset($this) && isset($this->_error_class)) {
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$ec = $this->_error_class;
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} else {
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$ec = 'PEAR_Error';
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}
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if ($skipmsg) {
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return new $ec($code, $mode, $options, $userinfo);
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} else {
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return new $ec($message, $code, $mode, $options, $userinfo);
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}
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}
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// }}}
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// {{{ pushErrorHandling()
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/**
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* Push a new error handler on top of the error handler options stack. With this
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* you can easely override the actual error handler for some code and restore
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* it later with popErrorHandling.
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*
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* @param $mode mixed (same as setErrorHandling)
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* @param $options mixed (same as setErrorHandling)
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*
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* @return bool Always true
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*
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* @see PEAR::setErrorHandling
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*/
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function pushErrorHandling($mode, $options = null)
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{
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$stack = &$GLOBALS['_PEAR_error_handler_stack'];
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if (!is_array($stack)) {
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if (isset($this)) {
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$def_mode = &$this->_default_error_mode;
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$def_options = &$this->_default_error_options;
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// XXX Used anywhere?
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//$def_callback = &$this->_default_error_callback;
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} else {
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$def_mode = &$GLOBALS['_PEAR_default_error_mode'];
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$def_options = &$GLOBALS['_PEAR_default_error_options'];
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// XXX Used anywhere?
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//$def_callback = &$GLOBALS['_PEAR_default_error_callback'];
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}
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$stack = array();
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$stack[] = array($def_mode, $def_options);
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}
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if (isset($this)) {
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$this->setErrorHandling($mode, $options);
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} else {
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PEAR::setErrorHandling($mode, $options);
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}
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$stack[] = array($mode, $options);
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return true;
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}
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// }}}
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// {{{ popErrorHandling()
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/**
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* Pop the last error handler used
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*
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* @return bool Always true
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*
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* @see PEAR::pushErrorHandling
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*/
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function popErrorHandling()
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{
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$stack = &$GLOBALS['_PEAR_error_handler_stack'];
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array_pop($stack);
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list($mode, $options) = $stack[sizeof($stack) - 1];
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if (isset($this)) {
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$this->setErrorHandling($mode, $options);
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} else {
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PEAR::setErrorHandling($mode, $options);
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}
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return true;
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}
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// }}}
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}
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// {{{ _PEAR_call_destructors()
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function _PEAR_call_destructors()
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{
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global $_PEAR_destructor_object_list;
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if (is_array($_PEAR_destructor_object_list) &&
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sizeof($_PEAR_destructor_object_list))
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{
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reset($_PEAR_destructor_object_list);
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while (list($k, $objref) = each($_PEAR_destructor_object_list)) {
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$classname = get_class($objref);
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while ($classname) {
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$destructor = "_$classname";
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if (method_exists($objref, $destructor)) {
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$objref->$destructor();
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break;
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} else {
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$classname = get_parent_class($classname);
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}
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}
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}
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// Empty the object list to ensure that destructors are
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// not called more than once.
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$_PEAR_destructor_object_list = array();
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}
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}
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// }}}
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class PEAR_Error
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{
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// {{{ properties
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var $error_message_prefix = '';
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var $error_prepend = '';
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var $error_append = '';
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var $mode = PEAR_ERROR_RETURN;
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var $level = E_USER_NOTICE;
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var $code = -1;
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var $message = '';
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var $debuginfo = '';
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// Wait until we have a stack-groping function in PHP.
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//var $file = '';
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//var $line = 0;
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// }}}
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// {{{ constructor
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/**
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* PEAR_Error constructor
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*
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* @param $message error message
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*
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* @param $code (optional) error code
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*
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* @param $mode (optional) error mode, one of: PEAR_ERROR_RETURN,
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* PEAR_ERROR_PRINT, PEAR_ERROR_DIE, PEAR_ERROR_TRIGGER or
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* PEAR_ERROR_CALLBACK
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*
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* @param $level (optional) error level, _OR_ in the case of
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* PEAR_ERROR_CALLBACK, the callback function or object/method
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* tuple.
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*
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* @access public
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*
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*/
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function PEAR_Error($message = 'unknown error', $code = null,
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$mode = null, $options = null, $userinfo = null)
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{
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if ($mode === null) {
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$mode = PEAR_ERROR_RETURN;
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}
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$this->message = $message;
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$this->code = $code;
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$this->mode = $mode;
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$this->userinfo = $userinfo;
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if ($mode & PEAR_ERROR_CALLBACK) {
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$this->level = E_USER_NOTICE;
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$this->callback = $options;
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} else {
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if ($options === null) {
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$options = E_USER_NOTICE;
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}
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$this->level = $options;
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$this->callback = null;
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}
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if ($this->mode & PEAR_ERROR_PRINT) {
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if (is_null($options) || is_int($options)) {
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$format = "%s";
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} else {
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$format = $options;
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}
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printf($format, $this->getMessage());
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}
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if ($this->mode & PEAR_ERROR_TRIGGER) {
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trigger_error($this->getMessage(), $this->level);
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}
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if ($this->mode & PEAR_ERROR_DIE) {
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$msg = $this->getMessage();
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if (is_null($options) || is_int($options)) {
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$format = "%s";
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if (substr($msg, -1) != "\n") {
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$msg .= "\n";
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}
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} else {
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$format = $options;
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}
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die(sprintf($format, $msg));
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}
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if ($this->mode & PEAR_ERROR_CALLBACK) {
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if (is_string($this->callback) && strlen($this->callback)) {
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call_user_func($this->callback, $this);
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} elseif (is_array($this->callback) &&
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sizeof($this->callback) == 2 &&
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is_object($this->callback[0]) &&
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is_string($this->callback[1]) &&
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strlen($this->callback[1])) {
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@call_user_method($this->callback[1], $this->callback[0],
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$this);
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}
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}
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}
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// }}}
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// {{{ getMode()
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/**
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* Get the error mode from an error object.
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*
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* @return int error mode
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* @access public
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*/
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function getMode() {
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return $this->mode;
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}
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// }}}
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// {{{ getCallback()
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/**
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* Get the callback function/method from an error object.
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*
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* @return mixed callback function or object/method array
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* @access public
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*/
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function getCallback() {
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return $this->callback;
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}
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// }}}
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// {{{ getMessage()
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/**
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* Get the error message from an error object.
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*
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* @return string full error message
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* @access public
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*/
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function getMessage ()
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{
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return ($this->error_prepend . $this->error_message_prefix .
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$this->message . $this->error_append);
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}
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// }}}
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// {{{ getCode()
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/**
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* Get error code from an error object
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*
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* @return int error code
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* @access public
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*/
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function getCode()
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{
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return $this->code;
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}
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// }}}
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// {{{ getType()
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/**
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* Get the name of this error/exception.
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*
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* @return string error/exception name (type)
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* @access public
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*/
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function getType ()
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{
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return get_class($this);
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}
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// }}}
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// {{{ getUserInfo()
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/**
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* Get additional user-supplied information.
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*
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* @return string user-supplied information
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* @access public
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*/
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function getUserInfo ()
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{
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return $this->userinfo;
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}
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// }}}
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// {{{ getDebugInfo()
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/**
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* Get additional debug information supplied by the application.
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*
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* @return string debug information
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* @access public
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*/
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function getDebugInfo ()
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{
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return $this->getUserInfo();
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}
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// }}}
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// {{{ addUserInfo()
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function addUserInfo($info)
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{
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if (empty($this->userinfo)) {
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$this->userinfo = $info;
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} else {
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$this->userinfo .= " ** $info";
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}
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}
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// }}}
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// {{{ toString()
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/**
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* Make a string representation of this object.
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*
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* @return string a string with an object summary
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* @access public
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*/
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function toString() {
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$modes = array();
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$levels = array(E_USER_NOTICE => 'notice',
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E_USER_WARNING => 'warning',
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E_USER_ERROR => 'error');
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if ($this->mode & PEAR_ERROR_CALLBACK) {
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if (is_array($this->callback)) {
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$callback = get_class($this->callback[0]) . '::' .
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$this->callback[1];
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} else {
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$callback = $this->callback;
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}
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return sprintf('[%s: message="%s" code=%d mode=callback '.
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'callback=%s prefix="%s" prepend="%s" append="%s" '.
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'info="%s"]',
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get_class($this), $this->message, $this->code,
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$callback, $this->error_message_prefix,
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$this->error_prepend, $this->error_append,
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$this->userinfo);
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}
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if ($this->mode & PEAR_ERROR_CALLBACK) {
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$modes[] = 'callback';
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}
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if ($this->mode & PEAR_ERROR_PRINT) {
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$modes[] = 'print';
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}
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if ($this->mode & PEAR_ERROR_TRIGGER) {
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$modes[] = 'trigger';
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}
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if ($this->mode & PEAR_ERROR_DIE) {
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$modes[] = 'die';
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}
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if ($this->mode & PEAR_ERROR_RETURN) {
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$modes[] = 'return';
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}
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return sprintf('[%s: message="%s" code=%d mode=%s level=%s prefix="%s" '.
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'prepend="%s" append="%s" info="%s"]',
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get_class($this), $this->message, $this->code,
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implode("|", $modes), $levels[$this->level],
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$this->error_message_prefix,
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$this->error_prepend, $this->error_append,
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$this->userinfo);
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}
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// }}}
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}
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register_shutdown_function("_PEAR_call_destructors");
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/*
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* Local Variables:
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* mode: php
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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*/
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?>
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