适配器模式的另一种解释

<?php

//目标角色
interface Target 
{
    public function simpleMethod1();
    public function simpleMethod2();
}

//源角色
class Adaptee 
{
    public function simpleMethod1()
    {
        echo 'Adapter simpleMethod1'."<br>";
    }
}

//类适配器角色
class Adapter implements Target 
{
    private $adaptee;
    function __construct(Adaptee $adaptee) 
    {
        $this->adaptee = $adaptee;
    }
    //委派调用Adaptee的sampleMethod1方法
    public function simpleMethod1()
    {
        echo $this->adaptee->simpleMethod1();
    }
    public function simpleMethod2()
    {
        echo 'Adapter simpleMethod2'."<br>";
    }
}

//客户端
class Client {

    public static function main() {
        $adaptee = new Adaptee();
        $adapter = new Adapter($adaptee);
        $adapter->simpleMethod1();
        $adapter->simpleMethod2();
    }
}

Client::main();
?>