3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $wordlist = 'systematic,gear,synthesis,mysterious'; $words = explode(',', $wordlist); foreach($words as $word) { if (preg_match('~(?=[^s]*s)(?=[^m]*m)(?=[^e]*e)~', $word)) echo '<br/>' . $word; }
Output for 4.3.0 - 7.2.0
<br/>systematic<br/>mysterious