Online PHP editor | refs for SR7UZ

<?php $re = '/"\K[\w-]+(\.jpg)(?=")/'; $str = ';s:27:"2018/08/hello-there-003.jpg";s:5:"sizes";a:23:{s:9:"thumbnail";a:4:{s:4:"file";s:27:"hello-there-003-150x150.jpg";s:5:"width";i:150;s:6:"height";i:150;s:9:"mime-type";s:10:"image/jpeg";}s:6:"medium";a:4:{s:4:"file";s:27:"hello-there-003-300x200.jpg" '; $subst = 'replacement$1'; $result = preg_replace($re, $subst, $str); echo $result;