具有特定取消资格的正则表达式匹配模式

Question

I have a regex that will remove .php from the end of a URL:

^(.*)\\.php$

this will match www.mysite.com/something.php with the first capturing group being www.mysite.com/something

I want to tweak this to match all urls like this a excluding specific url path. For instance "exclude.php" should not be matched and thus leave the .php

www.mysite.com/exclude.php -> www.mysite.com/exclude.php

but for any other path it should remove it:

www.mysite.com/anythingelse.php -> www.mysite.com/anythingelse

Answer 1

You can use a negative lookbehind for excluding a text before .php :

^(.+)(?<!\/exclude)\.php$

RegEx Demo

(?<!\\/exclude) is negative lookbehind to assert failure if .php is preceded by /exclude