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php require条件引用问题

WBOY
Release： 2016-06-23 13:37:57
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网上看到这么一段话
include()与require()的功能相同，用法上却有一些不同，include()是有条件包含函数，而require()则是无条件包含函数。
无论$something取何值，下面的代码将把文件somefile.php包含进文件里： 

if($something){　　require 'somefile.php';}
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但在我实际测试中，条件为假时是不包含的。

是因为环境不同，还是另有原因，请大家指教


回复讨论(解决方案)

你看到的是针对 php4 的介绍
在 php5 中，无论是 require 还是 include 都在预编译时进行加载（不用时看不见） 
两者的区别仅限于前者出错时会中断程序，而后者不会

这个明显是错的，至少现在的版本中，if(false){}  根本不会去执行if代码块。

$something=0  或等于null 你看看还会引进来不

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