浅析php适配器模式（Adapter）

//老的代码    
class User {   
    private $name;   
    function __construct($name) {   
        $this->name = $name;   
    }   
    public function getName() {   
        return $this->name;   
    }   
}   

//新代码，开放平台标准接口   
interface UserInterface {   
    function getUserName();   
}   
class UserInfo implements UserInterface {   
    protected $user;   
    function __construct($user) {   
        $this->user = $user;   
    }   
    public function getUserName() {   
        return $this->user->getName();   
    }   
}   

$olduser = new User('张三');   
echo $olduser->getName()."n";   
$newuser = new UserInfo($olduser);   
echo $newuser->getUserName()."n";