如何使用 PHP 从字符串中删除子字符串？
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How to remove a substring from a string using PHP?
提问by pepe
Given the following string
给定以下字符串
http://thedude.com/05/simons-cat-and-frog-100x100.jpg
I would like to use substror trim(or whatever you find more appropriate) to return this
我想用substr或trim（或任何你觉得更合适的）来返回这个
http://thedude.com/05/simons-cat-and-frog.jpg
that is, to remove the -100x100. All images I need will have that tagged to the end of the filename, immediately before the extension.
也就是说，要删除-100x100. 我需要的所有图像都将标记到文件名的末尾，紧接在扩展名之前。
There appears to be responses for this on SO re Ruby and Python but not PHP/specific to my needs.
在 SO re Ruby 和 Python 上似乎对此有回应，但没有针对我的需求的 PHP/特定。
How to remove the left part of a string?
Remove n characters from a start of a string
Remove substring from the string
Any suggestions?
有什么建议？
回答by Sampson
If you want to match any width/height values:
如果要匹配任何宽度/高度值：
$path = "http://thedude.com/05/simons-cat-and-frog-100x100.jpg";
// http://thedude.com/05/simons-cat-and-frog.jpg
echo preg_replace( "/-\d+x\d+/", "", $path );
Demo: http://codepad.org/cnKum1kd
演示：http: //codepad.org/cnKum1kd
The pattern used is pretty basic:
使用的模式非常基本：
/ Denotes the start of the pattern - Literal - character \d+ A digit, 1 or more times x Literal x character \d+ A digit, 1 or more times / Denotes the end of the pattern
回答by WojtekT
$url = "http://thedude.com/05/simons-cat-and-frog-100x100.jpg";
$new_url = str_replace("-100x100","",$url);
回答by flowfree
$url = str_replace("-100x100.jpg", '.jpg', $url);
Use -100x100.jpgfor bullet-proof solution.
使用-100x100.jpg防弹解决方案。
回答by Norse
If -100x100are the only characters you're trying to remove from all of your strings, why not use str_replace?
如果-100x100是您要从所有字符串中删除的唯一字符，为什么不使用str_replace？
$url = "http://thedude.com/05/simons-cat-and-frog-100x100.jpg";
str_replace("-100x100", "", $url);
