3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $master = array(); $arrColors = array('R', 'B', 'G' ,'Y'); $arrNumbers = array('1', '2', '3', '4'); foreach($arrColors as $color) { foreach($arrNumbers as $num) { $master += array($color => $num); //echo $color.' => '.$num; //echo "\n"; } $master += $master; } print_r($master);
based on W3EO0
Output for 4.3.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [R] => 1 [B] => 1 [G] => 1 [Y] => 1 )