3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $s = '<iframe ><embed boowidth=222>fdgwidth=700dfg</embed>sfsdfsdf</iframe>'; $matches = array(); var_dump( preg_replace('~(.*<[^>]+\swidth=["\']?)(\d+)(["\']?[^>]*>.*)~', '${1}---${3}', $s) ); var_dump($matshes);
based on j6J9E
Output for 5.0.4 - 7.2.0
string(69) "<iframe ><embed boowidth=222>fdgwidth=700dfg</embed>sfsdfsdf</iframe>" Notice: Undefined variable: matshes in /in/0qaAS on line 5 NULL
Output for 4.3.0 - 5.0.3
string(69) "<iframe ><embed boowidth=222>fdgwidth=700dfg</embed>sfsdfsdf</iframe>" Notice: Undefined variable: matshes in /in/0qaAS on line 5 NULL