PHP require 在计算为假的语句中也会执行?大错特错



今天,和我一起做项目的朋友跟我提了一个问题,他让我尽量使用 include,少使用 require,这使我感到十分奇怪。

询问一下,他给出的答案竟然是 include 好控制,而 require 不好控制,并且提出了一个让我感到奇怪的观点——require 在计算为假的语句中也会执行。
这,我在 PHP 手册中从来没看到过,也从来没听说过。


PHP 手册中说:

如果最后仍未找到文件则 include 结构会发出一条警告;这一点和 require 不同,后者会发出一个致命错误。

requireinclude 几乎完全一样,除了处理失败的方式不同之外。require 在出错时产生 E_COMPILE_ERROR 级别的错误。换句话说将导致脚本中止而 include 只产生警告(E_WARNING),脚本会继续运行。


测试环境:PHP 5.3.28

echo 'Is Show?'


echo 'Hello!'
if (false) {
    require 'file.php';



我在知乎的提问:PHP require 在计算为假的语句中也会执行?


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Nikbobo,本名刘永强,记忆空间站长,男,1998 年出生于广东茂名,至今(2020 年)21 岁,目前(2020 年)就读于广州大学华软软件学院,常以“nikbobo”这个网名混迹互联网。如无特殊注明,Nikbobo 在本站发表的文章,遵循 知识共享 署名-非商业性使用-相同方式共享 4.0 国际 许可协议。详情请参阅关于页面的作者介绍。

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