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为什么strpos()函数不能用变量查询？

WBOY
Release： 2016-06-23 13:34:17
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strpos($str,"ABC");
 这样可以。

$A="ABC";
strpos($str,$A);
这样就不可以。


这是为什么？


回复讨论(解决方案)

怎么可能呢 

$str = "123ABCDEF";$A = "ABC";var_dump(strpos($str, $A));var_dump(strpos($str,"ABC"));
Copy after login
int(3)
int(3)

显然是你传入的数据有问题


嗯，不是这个情况，我问题提的不对。
原本的样子是这个模样：

$sp=$ID[$home[$e]];
$location=strpos($myfile,$sp);

$sp的有值，但$location没有。
什么情况？

具体情况要具体分析
你把那几个变量都打印出来，看看问题出在哪里


哦，知道怎么回事了，$myfile根本就没这个字符串，我没注意看资源文档，应该检查一下的。


不好意思打扰了
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为什么strpos()函数不能用变量查询？
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