3v4l.org

run code in 300+ PHP versions simultaneously
<?php $master = array(); $arrColors = array('Red', 'Blue', 'Green' ,'Yellow'); $arrNumbers = array('1', '2', '3', '4'); foreach($arrColors as $color) { foreach($arrNumbers as $num) { $temp = $color.' - '.$num; array_push($master, $temp); } } print_r($master);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => Red - 1 [1] => Red - 2 [2] => Red - 3 [3] => Red - 4 [4] => Blue - 1 [5] => Blue - 2 [6] => Blue - 3 [7] => Blue - 4 [8] => Green - 1 [9] => Green - 2 [10] => Green - 3 [11] => Green - 4 [12] => Yellow - 1 [13] => Yellow - 2 [14] => Yellow - 3 [15] => Yellow - 4 )
preferences:
330.83 ms | 406 KiB | 459 Q