裝飾者模式在中介軟體中使用

後盾網

<?php

namespace App;

interface Middleware
{
    public function handle($next);
}

class Session implements Middleware
{
    public function handle($next)
    {
        echo "<br/>Session Start<br/>";
        $next();
        echo "<br/>Session End<br/>";
    }
}

class Mysql implements Middleware
{
    public function handle($next)
    {
        echo "<br/>Mysql Start<br/>";
        $next();
        echo "<br/>Mysql end<br/>";
    }
}

function run($next, $step)
{
    return function () use ($next, $step) {
        call_user_func_array([new $step, `handle`], [$next]);
    };
}

$class    = [Session::class, Mysql::class];
$callback = array_reduce($class, `App
un`, function () {
});
$callback();

執行結果

Mysql Start

Session Start

Session End

Mysql end