3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php //$a = 1; $time=microtime(true);for($x=0;$x<100000;$x++){ $b = is_null($a);} round(microtime(true)-$time, 5)."\n"; $a = 1; $time=microtime(true);for($x=0;$x<100000;$x++){ $b = ($a === null);} round(microtime(true)-$time, 5)."\n";;
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0