3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $s = '<iframe width="800">sfsdfsdf</iframe>'; echo preg_replace('~(.*width=["]?)(\d+)(["]?.*)~', '${1}222${3}', $s);
based on aOLKT
Output for 4.3.0 - 7.2.0
<iframe width="222">sfsdfsdf</iframe>