3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump( filter_var(1, FILTER_VALIDATE_BOOLEAN) ); var_dump( filter_var('1', FILTER_VALIDATE_BOOLEAN) ); var_dump( filter_var(0, FILTER_VALIDATE_BOOLEAN) ); var_dump( filter_var('0', FILTER_VALIDATE_BOOLEAN) ); var_dump( filter_var(true, FILTER_VALIDATE_BOOLEAN) ); var_dump( filter_var(false, FILTER_VALIDATE_BOOLEAN) );
based on Sk1cn
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0beta1
bool(true) bool(true) bool(false) bool(false) bool(true) bool(false)