php设计模式之单例模式

少林码僧发布时间：2017-06-04 19:11:56 ，浏览量：0

单例模式也称单态，是23种设计模式中最简单的一种，从他的名字就可以知道他的核心思想，单例模式就是系统中只有一个这样的对象，对象只有一个，在Java或者C#中，单例模式一般有两种，分别是懒汉式、饿汉式，但是在PHP中常用的就是懒汉式，由于PHP是单线程的，懒汉式也不存在双重验证。

    懒汉式具体代码：


    
        
        
        
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