interface userOperateImpl

{

    public function operate($username);

}

class userLoginLog implements userOperateImpl

{

    public function operate($username)

    {

        echo '用户名为 ['.$username.'] 的用户登陆记录日志<br/>';

    }

}

class UserLoginPush implements userOperateImpl

{

    public function operate($username)

    {

        echo '用户名为 ['.$username.'] 的用户登陆推送消息<br/>';

    }

}

class UserLogin

{

    private $_obj = array();

    public $username;

    public function __construct($username,$_objArr = array())

    {

        $this->username = $username;

        $this->_obj = $_objArr;

    }

    public function userLogin()

    {

        echo "用户名为 [".$this->username."] 的用户登陆!<br/>";

        $this->trigger();

    }

    private function trigger()

    {

        if(!empty($this->_obj)){

            foreach($this->_obj as $obj){

                /** @var userOperateImpl $obj */

                $obj->operate($this->username);

            }

        }

    }

}

$user = new UserLogin('Mr Li', array(

        new userLoginLog(),

        new UserLoginPush()

    )

);

$user->userLogin();