今天看Laravel框架。看见一个很奇怪的写法。就是$this->{ 。当时很奇怪。后来发现可以让方法名是变量，同样对对象的属性也可行。这个太酷了。

class User{
    public $name;

    public function say(){
        echo $this->name . " say:Hello world.";
    }

    public function doWork($name){
        $this->{'name'} = $name;
        foreach (array('say') as $method){
                $this->{"$method"}();
        }        
    }
}

$user = new User();
$user->doWork("song");

输出结果

song say:Hello world.