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How to implement website plug-in mechanism in php

高洛峰
Release: 2016-10-14 10:18:43
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The first is the implementation of the plug-in management class:

* @subpackage Libraries * @category Libraries * @author Saturn * @link http://www.cnsaturn.com/ */ class PluginManager { /** * 监听已注册的插件 * * @access private * @var array */ private $_listeners = array(); /** * 构造函数 * * @access public * @return void */ public function __construct() { #这里$plugin数组包含我们获取已经由用户激活的插件信息 #为演示方便,我们假定$plugin中至少包含 #$plugin = array( # 'name' => '插件名称', # 'directory'=>'插件安装目录' #); $plugins = get_active_plugins();#这个函数请自行实现 if($plugins) { foreach($plugins as $plugin) {//假定每个插件文件夹中包含一个actions.php文件,它是插件的具体实现 if (@file_exists(STPATH .'plugins/'.$plugin['directory'].'/actions.php')) { include_once(STPATH .'plugins/'.$plugin['directory'].'/actions.php'); $class = $plugin['name'].'_actions'; if (class_exists($class)) { //初始化所有插件 new $class($this); } } } } #此处做些日志记录方面的东西 } /** * 注册需要监听的插件方法(钩子) * * @param string $hook * @param object $reference * @param string $method */ function register($hook, &$reference, $method) { //获取插件要实现的方法 $key = get_class($reference).'->'.$method; //将插件的引用连同方法push进监听数组中 $this->_listeners[$hook][$key] = array(&$reference, $method); #此处做些日志记录方面的东西 } /** * 触发一个钩子 * * @param string $hook 钩子的名称 * @param mixed $data 钩子的入参 * @return mixed */ function trigger($hook, $data='') { $result = ''; //查看要实现的钩子,是否在监听数组之中 if (isset($this->_listeners[$hook]) && is_array($this->_listeners[$hook]) && count($this->_listeners[$hook]) > 0) { // 循环调用开始 foreach ($this->_listeners[$hook] as $listener) { // 取出插件对象的引用和方法 $class =& $listener[0]; $method = $listener[1]; if(method_exists($class,$method)) { // 动态调用插件的方法 $result .= $class->$method($data); } } } #此处做些日志记录方面的东西 return $result; } } ?> 然后是插件的具体实现方法 register('demo', $this, 'say_hello'); } function say_hello() { echo 'Hello World'; } } ?>
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For example, if I want to put say_hello on the homepage of my blog, Index.php, then you write somewhere in index.php: The code is as follows:
$pluginManager->trigger ('demo','');

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