一个例子让你明白php插件机制原理

代码目录结构如下:

页面效果如下：

function.php

<?php

function addAction($hook,$actionFunc){
    
    

    global $emHooks;

    if(!@in_array($actionFunc,$emHooks[$hook])){
    
    
        $emHooks[$hook][]=$actionFunc;
    }
    return true;
}


function doAction($hook){
    
    
        global $emHooks;
        $args=array_slice(func_get_args(),1);
        if(isset($emHooks[$hook])){
    
    
            foreach($emHooks[$hook] as $function){
    
    
                call_user_func_array($function,$args);
            }
        }
}

在页面上设置钩子并埋点,我这里以index.php为例

<?php
define("APP_ROOT",str_replace("\\","/",dirname(__FILE__))."/");

require ("function.php");

function load_plugins_file($plugin){
    
    
    if(is_string($plugin) && preg_match("/^[\w\-\/]+$/",$plugin) && file_exists(APP_ROOT."plugins/".$plugin.".php")){
    
    
        require (APP_ROOT."plugins/".$plugin.".php");
    }
}

$pluginsName=array("check","login");
foreach ($pluginsName as $plugin){
    
    

    load_plugins_file($plugin);
}
doAction("exp");

echo "<p>index 页面</p>";

新建plugins目录,在目录下新建两个插件check.php和login.php
check.php内容如下：

<?php
function check(){
    
    
    echo "<p>check 插件被调用</p>";
}

addAction("exp","check");

login.php内容如下

<?php
function login(){
    
    
    echo "<p>login 插件被调用</p>";
}

addAction("exp","login");