### 实例 PHP中的对象是引用传递, PHP中只有对象是引用传递 . 数组是值传递 . ~~~ class Person{ public $name; public function __construct($name) { $this->name = $name; } } $p1 = new Person("jack"); $p2 = $p1; $p2->name = "milan"; var_dump($p1); ~~~ ~~~ object(Person)#1 (1) { ["name"]=> string(5) "milan" } ~~~