<?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(); }

源自：2-7 PHP类和对象之访问控制

<?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(); }

这个为啥不对呢？

提问者：东风破 2014-11-15 19:56

个回答

慕粉3724931

2016-08-23 19:47:16

self::$_object=new car(); object前面少了下划线。

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qq_拒绝平庸_0

2015-12-16 23:01:11

类的构造函数默认是public类型的，类在实例化是会自动调用

0