3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 0; $b = &$a; echo ($a+=100) + ($a+=100) . "\n"; $c = 1; echo (++$c) + (++$c);
Output for 7.0.0 - 7.2.0
300 5
Output for 4.3.0 - 5.6.28
400 5