3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(array(1, 2), array(3, 4), array(5)); function get_combinations($arrays) { $result = array(array()); $count = count($arrays); $first_array = $arrays[0]; if($count > 2) { $array_merg = get_combinations(array_slice($arrays, 1)); } else { $array_merg = $arrays[1]; } $tmp = array(); foreach($first_array as $arele1) { //print_r($arele1); foreach($array_merg as $arele2) { print_r($arele2); if(is_array($arele2)) { $tmp[] = array_unshift($arele2,$arele1); } else { $tmp[] = array($arele1,$arele2); } print_r($tmp); } } print_r($tmp); return $tmp; } var_dump(get_combinations($a));
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, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
5Array ( [0] => Array ( [0] => 3 [1] => 5 ) ) 5Array ( [0] => Array ( [0] => 3 [1] => 5 ) [1] => Array ( [0] => 4 [1] => 5 ) ) Array ( [0] => Array ( [0] => 3 [1] => 5 ) [1] => Array ( [0] => 4 [1] => 5 ) ) Array ( [0] => 3 [1] => 5 ) Array ( [0] => 3 ) Array ( [0] => 4 [1] => 5 ) Array ( [0] => 3 [1] => 3 ) Array ( [0] => 3 [1] => 5 ) Array ( [0] => 3 [1] => 3 [2] => 3 ) Array ( [0] => 4 [1] => 5 ) Array ( [0] => 3 [1] => 3 [2] => 3 [3] => 3 ) Array ( [0] => 3 [1] => 3 [2] => 3 [3] => 3 ) array(4) { [0]=> int(3) [1]=> int(3) [2]=> int(3) [3]=> int(3) }

preferences:
214.4 ms | 407 KiB | 353 Q