~~~ class Person{ } $person1 = new Person(); $person2 = $person1; $person3 = clone $person1; //person1和person2对象地址一样, person1和person3对象地址不一样 var_dump($person1); var_dump($person2); var_dump($person3); ~~~ 魔术方法__clone ~~~ class Person{ //对象clone完成时自动调用 public function __clone() { // TODO: Implement __clone() method. } } ~~~