3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $var = 'ABC123'; switch (false) { case isset($var): throw new Exception("Not set!"); case $var: throw new Exception("False!"); case isstring($var): throw new Exception("Not a string!"); /* case customGuardFunction() * */ default: echo "All checks passed!"; }
based on Hcm9k
Output for 7.0.0 - 7.3.1
Fatal error: Uncaught Error: Call to undefined function isstring() in /in/01sfs:10 Stack trace: #0 {main} thrown in /in/01sfs on line 10
Process exited with code 255.
Output for hhvm-3.15.4
Fatal error: Uncaught Error: Call to undefined function isstring() in /in/01sfs:10 Stack trace: #0 {main}
Process exited with code 255.
Output for 5.6.0 - 5.6.30
Fatal error: Call to undefined function isstring() in /in/01sfs on line 10
Process exited with code 255.