3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $embedCode = "<iframe width='800' height='600'> </iframe>"; echo preg_replace('~(<iframe[^>]*\swidth=["\']?)(\d+)(["\']?\s?.*)~', '${1}' . '666' . '${3}', $embedCode); echo preg_replace('~(<iframe[^>]*\sheight=["\']?)(\d+)(["\']?\s?.*)~', '${1}' . '666' . '${3}', $embedCode);
based on Q3MOL
Output for 4.3.0 - 7.1.0
<iframe width='666' height='600'> </iframe><iframe width='800' height='666'> </iframe>