3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(FILTER_VALIDATE_BOOLEAN);
Output for 5.2.0 - 7.1.0
int(258)
Output for 4.3.0 - 5.1.6
Notice: Use of undefined constant FILTER_VALIDATE_BOOLEAN - assumed 'FILTER_VALIDATE_BOOLEAN' in /in/HkLdg on line 2 string(23) "FILTER_VALIDATE_BOOLEAN"