Community Learn Tools Library Leisure
search
English
Home > Backend Development > PHP Tutorial > 为什么strpos()函数不能用变量查询？

为什么strpos()函数不能用变量查询？

WBOY
Release： 2016-06-23 13:34:17
Original
1675 people have browsed it

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
Related labels：
为什么strpos()函数不能用变量查询？
source：php.cn
Previous article：为什么我打印不出来$_SERVER['PATH_INFO']呢 Next article：hust校赛d题 PHP is the best language int the world(二分图着色+递推)
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
Using PHP, can I put a foreach statement into a transient? I'm working in WP using PHP and trying to reduce the load time of a function that fetches ...
From 2024-04-03 17:12:43
0
2
330
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template