3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a='a:2:{s:4:"user";b:1;s:4:"pass";b:1;}'; $b=unserialize($a); if ($b['user']=='a')echo 'aaa';
based on WQAY1
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc3
aaa