3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $html = '<b>smth</b> smth <b>smth</b>'; var_dump(!preg_match('|</b>.*[A-zА-яЁё0-9]+.*<b|', $html));
based on 4atcA
Output for 4.3.0 - 7.2.0
bool(false)