3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [ 'USA' => [ 'Alabama' => [ 'Montgomery', 'Birmingham' ], 'Arizona' => [ 'Phoenix', 'Mesa', 'Gilbert' ] ], 'Germany' => [ 'West Germany' => [ 'Bonn', 'Cologne' ] ] ];
Output for 5.4.0 - 7.2.0