php什么版本呀？

(new Test($obj))->client

这种表达式5.4以前不支持

class Foo {
    public function method(){
        echo 'hi';
    }
}

class Test {
    public $client;
    public function __construct($obj){
        $this->client = $obj;
    }
}

$obj = new Foo();

// 代码1
$client = (new Test($obj))->client;
$client->method();