3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $value = false; $v = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE); if ($v === null) { var_dump($value); echo 'wat?!'; } else { echo 'True is a boolean, nice to know'; }
Output for 5.4.8 - 7.1.0
True is a boolean, nice to know
Output for 5.2.0 - 5.4.7
bool(false) wat?!
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function filter_var() in /in/2HAOi on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: filter_var() in /in/2HAOi on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: filter_var() in /in/2HAOi on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: filter_var() in /in/2HAOi on line 3