适配器模式-PHP

学习框架遇到适配器问题，做下记录
1.类适配器，以继承为主要方式，扩展原有的类

interface class1
{
    function f1();
    function f2();
}

interface class2
{
    function f3();
    function f4();
}

class class3 implements class1
{
    public function f1(){
        echo "f1";
    }

    public function f2(){
        echo "f2";
    }
}

class class4 extends class3 implements class2{
    public function f3(){
        echo "f3";
    }
    public function f4(){
        echo "f4";
    }
}

$ob = new class4();
$ob->f1();
$ob->f2();
$ob->f3();
$ob->f4();

2.对象适配器，以基础类的对象传递方式扩展新的类

interface class1
{
    function f1();
    function f2();
}

interface class2
{
    function f3();
    function f4();
}

class class3 implements class1
{
    public function f1(){
        echo "f1";
    }

    public function f2(){
        echo "f2";
    }
}

class class4 implements class2{

    private $obj;

    public function __construct(class1 $obj){
        $this->obj = $obj;
    }

    public function __call($func, $args)
    {
        if (is_callable(array($this->obj, $func))) {
            return $this->obj->$func($args);
        }
    }

    public function f3(){
        echo "f3";
    }

    public function f4(){
        echo "f4";
    }

    public function f5(){
        echo "f5";
    }

}

$ob = new class4(new class3());
$ob->f1();
$ob->f2();
$ob->f3();
$ob->f4();
$ob->f5();