<?php
final class Plugin{private $plugins     = null;private $directory  = 'plugins';private $path        = null;public function __construct(){$this->path = $this->directory.'/';}public function autoload(){$interfaces = scandir($this->directory);unset($interfaces[0]);unset($interfaces[1]);foreach($interfaces as $interface){//load all of the plugins$file =  $this->path . $interface;if (@file_exists($file)){include_once($file);$class =  basename($interface, ".php");if (class_exists($class)){$this->$class = new $class($this);$vars = get_class_vars($class);$entity['name']           = $vars['name'];$entity['description']     = $vars['description'];$entity['author']       = $vars['author'];$entity['class']         = $class;$entity['methods']      = get_class_methods($class);$this->plugins[$class] = $entity;}}}}public function load($plugin){$file = $this->path . $plugin . '.php';if (@file_exists($file)){include_once($file);$class = $plugin;if (class_exists($class)){$this->$class = new $class($this);$vars = get_class_vars($class);$entity['name']          = $vars['name'];$entity['description']     = $vars['description'];$entity['author']       = $vars['author'];$entity['class']         = $class;$entity['methods']      = get_class_methods($class);$this->plugins[$class] = $entity;}}}public function show(){print_r($this->plugins);}
}

<?php
interface iPlugin
{public function test();
}

<?php
final class demo implements iPlugin{public static $author       = 'Neo Chen<openunix@163.com>';public static $name = 'Demo';public static $description = 'Demo Simple';public function __construct(){}public function test(){echo 'Hello world!!!';}
}

<?php
function __autoload($class_name) {require_once('library/'.$class_name . '.php');
}//include_once('library/Plugin.php');
$plugin = new Plugin();
echo '=============================';
$plugin->load('demo');
$plugin->demo->test();
echo '=============================';
$plugin->autoload();
$plugin->show();