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PHP学习:include()和require()的区别

Jun 21, 2016 am 08:59 AM
include once php require warning


include()和require()的区别 这相信是PHP中最基本的问题了,也是很多公司面试时必考的题呵呵。

给大家复习一下:

require() :如果文件不存在,会报出一个fatal error.脚本停止执行
include() : 如果文件不存在,会给出一个 warning,但脚本会继续执行

这里特别要注意的是:
使用include()文件不存在时,脚本继续执行,这种情况只出现在PHP 4.3.5之前,这一点,往往被人忽视。

推荐使用require_once()和include_once(),可以检测文件是否有重复包含。



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