3v4l.org

run code in 150+ 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 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
<br/>systematic<br/>mysterious
Output for hhvm-3.10.0

Process exited with code 153.