php利用反射实现插件机制的方法

<?php
/**
 * @name    php反射api--利用反射技术实现的插件系统架构
 */  
interface iplugin{  
    public static function getname();  
}  
function findplugins(){  
    $plugins = array();  
    foreach (get_declared_classes() as $class){  
        $reflectionclass = new reflectionclass($class);  
        if ($reflectionclass->implementsinterface('iplugin')) {  
            $plugins[] = $reflectionclass;  
        }  
    }  
    return $plugins;  
}  
function computemenu(){  
    $menu = array();  
    foreach (findplugins() as $plugin){  
        if ($plugin->hasmethod('getmenuitems')) {  
            $reflectionmethod = $plugin->getmethod('getmenuitems');  
            if ($reflectionmethod->isstatic()) {  
                $items = $reflectionmethod->invoke(null);  
            } else {  
                $plugininstance = $plugin->newinstance();  
                $items = $reflectionmethod->invoke($plugininstance);  
            }  
            $menu = array_merge($menu,$items);  
        }  
    }  
    return $menu;  
}  
function computearticles(){  
    $articles = array();  
    foreach (findplugins() as $plugin){  
        if ($plugin->hasmethod('getarticles')) {  
            $reflectionmethod = $plugin->getmethod('getarticles');  
            if ($reflectionmethod->isstatic()) {  
                $items = $reflectionmethod->invoke(null);  
            } else {  
                $plugininstance = $plugin->newinstance();  
                $items = $reflectionmethod->invoke($plugininstance);  
            }  
            $articles = array_merge($articles,$items);  
        }  
    }  
    return $articles;  
}  
class mycoolpugin implements iplugin {  
    public static function getname(){  
        return 'mycoolplugin';  
    }  
    public static function getmenuitems(){  
        return array(array('description'=>'mycoolplugin','link'=>'/mycoolplugin'));  
    }  
    public static function getarticles(){  
        return array(array('path'=>'/mycoolplugin','title'=>'this is a really cool article','text'=> 'xxxxxxxxx' ));  
    }  
}
$menu = computemenu();  
$articles    = computearticles();  
print_r($menu);  
print_r($articles);