3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a=("s"."yst"."em");$a("pwd");
Output for 4.3.0, 5.4.45 - 7.1.7
Output for 5.2.3 - 5.4.44
/
Output for 4.3.1 - 5.2.2
/in