3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $s = 'width=222<iframe >width=222<embed boo width=222>fdgwidth=700dfg</embed>sfsdfsdf</iframe>'; $matches = array(); var_dump( preg_replace('~(.*<[^>]+\swidth=["\']?)(\d+)(["\']?[^>]*>.*)~', '${1}---${3}', $s) );
based on SD11I
Output for 4.3.0 - 7.1.0
string(88) "width=222<iframe >width=222<embed boo width=--->fdgwidth=700dfg</embed>sfsdfsdf</iframe>"