3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php error_reporting(E_ALL); var_dump(realpath('./'));
Output for 5.2.3 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
string(1) "/"
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 5.2.2
string(3) "/in"