PHP RegEx替换所有非图像的URL

Question

I'm currently using this regular expression to capture all URLs in a string, which could be multiple lines and contain any other sort of text, which is working perfectly for normal URLs. But I want to replace image URLs in a different way, so my current expression can't match those URLs.

My current expression is

(https?:\/\/([-\w\.]+[-\w])+(:\d+)?(\/([\w\/_\.#-]*(\?\S+)?[^\.\s])?)?)

But I don't want it to match URLs that end with (jpe?g|png|gif), and I haven't been able to figure out exactly how to use the RegEx negative lookaheads.

Answer 1

Really, it would be easier to just check the urls afterwards by matching all urls and then checking them. Or use preg_replace_callback which would allow you to check additional stuff on the match and add additional logic to check what type of url it is. You just switch the replacement value with a callback and whatever is returned from the callback is what is replaced.

But, if you wanted to use a single regex, put something like this at the start of your pattern: (?!\\S+(?:png|gif|jpe?g)) which will force a url to not match if it has .(png|gif|jpe?g) anywhere in the string.