3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $blah = '1'; if (isset($blah) && (boolean) $blah) { var_dump('yes'); }
based on lpens
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
string(3) "yes"
Output for hhvm-3.10.0

Process exited with code 153.