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PHP闭包函数

知其黑、受其白发布时间：2021-08-30 17:26:13 ，浏览量：4

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闭包的概念
匿名函数
use

闭包的概念

闭包就是能够读取其他函数内部变量的函数。

例如在javascript中，只有函数内部的子函数才能读取局部变量，所以闭包可以理解成“定义在一个函数内部的函数“。

在本质上，闭包是将函数内部和函数外部连接起来的桥梁。在php中,闭包函数一般就是匿名函数。

举例,有一个定时任务,每一秒执行一次,现在我们要开启一个服务,然后准备在30秒的时候关闭这个服务


    
        
            
                
                
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