Online PHP editor | output for imYXf

<?php // Everything you enter here will be executed by our servers. Try it! $wineBuys = array ( [2013-09-12] => 20; [2013-09-13] => 10, [2013-09-14] => 49 ); $hamBuys = array ( [2013-09-12] => 1; [2013-09-13] => 16, [2013-09-14] => 2 ); $cheeseBuys = array ( [2013-09-12] => 5; [2013-09-13] => 6, [2013-09-14] => 12 ); $calcByDate = array(); foreach ($wineBuys as $key => $value) { if (! array_key_exists($key, $calcByDate)) { $calcByDate[$key] = array($wineBuys[$key]); } else { $calcByDate[$key][] = $wineBuys[$key]; } }