mirror of
https://github.com/e107inc/e107.git
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138 lines
3.1 KiB
PHP
138 lines
3.1 KiB
PHP
<?php
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/*
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* e107 website system
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*
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* Copyright (C) 2008-2009 e107 Inc (e107.org)
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* Released under the terms and conditions of the
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* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)
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*
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*
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*
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* $Source: /cvs_backup/e107_0.8/e107_handlers/override_class.php,v $
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* $Revision$
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* $Date$
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* $Author$
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*/
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if (!defined('e107_INIT')) { exit; }
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/*
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* USAGE
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* In user code, to override an existing function...
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*
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* $override->override_function('original_func_name','mynew_function_name',['optional_include_file_from_root']);
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*
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* In e107 code...
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* if ($over_func_name = $override->override_check('original_func_name')) {
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* $result=call_user_func($over_func_name, params...);
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* }
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*
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*
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*/
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//XXX IMPORTANT: // do not use e107 specific functions in this file - it may break secure_img_handler.
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class override {
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protected $functions = array();
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protected $includes = array();
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/**
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* Replace an existing function or class method
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* @param string|array $override - function name or class::method
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* @param string|array $function - new function name or class::method
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* @param $include (optional) - file to include from root dir.
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* @example e107::getOverride()->replace('secure_image::create_code', 'myclass::mymethod');
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*/
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public function replace($override,$function,$include='') // Alias with class functionality.
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{
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if(is_array($override))
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{
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$arr = $override[0]."::".$override[1];
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}
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else
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{
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$arr = $override;
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}
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$this->override_function($arr, $function, $include);
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}
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/**
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* check if an override exists
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* @param $override : function name or class object
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* @param $method : method name when 'class' is used for $override
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* @return mixed
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* @example if ($user_func = e107::getOverride()->check($this,'secure_image'))
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{
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return call_user_func($user_func);
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}
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*/
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public function check($override,$method='') // alias with check for class object
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{
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if($method != '')
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{
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$class = get_class($override);
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$override = $class."::".$method;
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}
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return $this->override_check($override);
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}
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function override_function($override, $function, $include)
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{
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if ($include)
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{
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$this->includes[$override] = $include;
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}
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else if (isset($this->includes[$override]))
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{
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unset($this->includes[$override]);
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}
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$this->functions[$override] = $function;
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}
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function override_check($override)
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{
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if (isset($this->includes[$override]))
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{
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if (file_exists($this->includes[$override]))
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{
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include_once($this->includes[$override]);
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}
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}
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if($override && isset($this->functions[$override]))
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{
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$tmp = (strpos($this->functions[$override],"::")) ? explode("::",$this->functions[$override]) : $this->functions[$override];
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}
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else
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{
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$tmp = false;
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}
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if(is_array($tmp) && class_exists($tmp[0]))
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{
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$cl = new $tmp[0];
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if(method_exists($cl,$tmp[1]))
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{
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return $this->functions[$override];
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}
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}
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if ($override && isset($this->functions[$override]) && function_exists($this->functions[$override]))
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{
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return $this->functions[$override];
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}
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else
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{
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return false;
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}
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}
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}
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?>
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