3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $thumb = "//i.vimeocdn.com/video/485741435_295x166.jpg"; $thumb = preg_replace("jpg", "600.jpg", $thumb); echo $thumb;
based on h5gNT
Output for 4.3.11 - 7.2.0
Warning: preg_replace(): Delimiter must not be alphanumeric or backslash in /in/YfleC on line 4
Output for 4.3.0 - 4.3.10
Warning: Delimiter must not be alphanumeric or backslash in /in/YfleC on line 4