3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = []; for($i=0; $i<100; $i++){ for($z=0; $z<$i; $z++){ $a[$i][$z] = ($z - $i); } }
based on tXFA4
Output for 5.5.0 - 7.3.0rc4