PHP preg_replace image extensions that aren't proceeded by a question mark?

I need to use preg_replace to append a query string on image paths for cache busting purposes.

Currently I am using the following, however it does not account for an edge case where image extensions already have a query string.

$html = preg_replace('/\.(jpg|png|gif|jpeg)/i', '.${1}?v=1', $html);  

How can I exclude matches that are followed by a question mark?

Much thanks for any help.

https://stackoverflow.com/questions/67014349/php-preg-replace-image-extensions-that-arent-proceeded-by-a-question-mark April 09, 2021 at 10:38AM