3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a[' 2'] = 3; $a[2] = 4; print_R($a);
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [ 2] => 3 [2] => 4 )
Output for hhvm-3.10.0

Process exited with code 153.