PHP正则表达式最后出现的单词

Question

My string is: /var/www/domain.com/public_html/foo/bar/folder/another/..

I want to remove the root folder from this string, to get only public folder, because some servers have multiple websites inside.

My actual regex is: /^(.*?)(www|public_html|public|html)/s

My actual result is: /domain.com/public_html/foo/bar/folder/another/..

But i want to remove the last ocorrence, and get somethig like this: /foo/bar/folder/another/..

Thanks!

Answer 1

You have to use a greedy quantifier and to check if the alternative is enclosed between slashes using lookarounds:

/^.*(?<![^\/])(?:www|public(?:_html)?|html)(?![^\/])/

About the lookarounds: I use negative lookarounds with a negated character class to check if there is a slash or the limit of the string at the same time. This way you are sure that for instance html is a folder and not the part of another folder name.

I removed the s modifier that is useless. I removed the capture groups too since the goal is to replace all with an empty string.

Answer 2

The ? makes your expression non-greedy which is not actually what you want here. Try:

^(.*)(www|public_html|public|html)

which should keep going until the last match.

Demo: https://regex101.com/r/v5WbB3/1/