5 回答object(Car)#3 (1)里的3是代表什么？

2 回答== O:3:"Car":1:{s:4:"name";s:7:"new car";} object(Car)#3 (1) { ["name"]=> string(7) "new car" }请问为什么是这样的输出结果 啊，我看不懂

3 回答这里为什么不可以直接实例化对象，$car=new Car()

4 回答<?php class Car { private function __construct(){ echo 'object creat'; } private static $_object = null; public static function getInstance(){ if(empty(self::$_object)){ self::$object = new Car(); }

1 回答O:3:"Car":1:{s:4:"name";s:7:"new car";}