3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $products = [1, 2, 3, 4, 5]; $vendors = ["Amazon", "Newegg", "Frys"]; $combinations = array(); function pc_permute($items, $perms = array()) { if (empty($items)) { //echo join(' ', $perms); //return $perms; var_dump($perms); //$combinations[] = $perms; } else { for ($i = count($items) - 1; $i >= 0; --$i) { $newitems = $items; $newperms = $perms; list($foo) = array_splice($newitems, $i, 1); array_unshift($newperms, $foo); pc_permute($newitems, $newperms); } } } pc_permute($products); //var_dump($combinations);
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) [4]=> int(5) } array(5) { [0]=> int(2) [1]=> int(1) [2]=> int(3) [3]=> int(4) [4]=> int(5) } array(5) { [0]=> int(1) [1]=> int(3) [2]=> int(2) [3]=> int(4) [4]=> int(5) } array(5) { [0]=> int(3) [1]=> int(1) [2]=> int(2) [3]=> int(4) [4]=> int(5) } array(5) { [0]=> int(2) [1]=> int(3) [2]=> int(1) [3]=> int(4) [4]=> int(5) } array(5) { [0]=> int(3) [1]=> int(2) [2]=> int(1) [3]=> int(4) [4]=> int(5) } array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(4) [3]=> int(3) [4]=> int(5) } array(5) { [0]=> int(2) [1]=> int(1) [2]=> int(4) [3]=> int(3) [4]=> int(5) } array(5) { [0]=> int(1) [1]=> int(4) [2]=> int(2) [3]=> int(3) [4]=> int(5) } array(5) { [0]=> int(4) [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(5) } array(5) { [0]=> int(2) [1]=> int(4) [2]=> int(1) [3]=> int(3) [4]=> int(5) } array(5) { [0]=> int(4) [1]=> int(2) [2]=> int(1) [3]=> int(3) [4]=> int(5) } array(5) { [0]=> int(1) [1]=> int(3) [2]=> int(4) [3]=> int(2) [4]=> int(5) } array(5) { [0]=> int(3) [1]=> int(1) [2]=> int(4) [3]=> int(2) [4]=> int(5) } array(5) { [0]=> int(1) [1]=> int(4) [2]=> int(3) [3]=> int(2) [4]=> int(5) } array(5) { [0]=> int(4) [1]=> int(1) [2]=> int(3) [3]=> int(2) [4]=> int(5) } array(5) { [0]=> int(3) [1]=> int(4) [2]=> int(1) [3]=> int(2) [4]=> int(5) } array(5) { [0]=> int(4) [1]=> int(3) [2]=> int(1) [3]=> int(2) [4]=> int(5) } array(5) { [0]=> int(2) [1]=> int(3) [2]=> int(4) [3]=> int(1) [4]=> int(5) } array(5) { [0]=> int(3) [1]=> int(2) [2]=> int(4) [3]=> int(1) [4]=> int(5) } array(5) { [0]=> int(2) [1]=> int(4) [2]=> int(3) [3]=> int(1) [4]=> int(5) } array(5) { [0]=> int(4) [1]=> int(2) [2]=> int(3) [3]=> int(1) [4]=> int(5) } array(5) { [0]=> int(3) [1]=> int(4) [2]=> int(2) [3]=> int(1) [4]=> int(5) } array(5) { [0]=> int(4) [1]=> int(3) [2]=> int(2) [3]=> int(1) [4]=> int(5) } array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(5) [4]=> int(4) } array(5) { [0]=> int(2) [1]=> int(1) [2]=> int(3) [3]=> int(5) [4]=> int(4) } array(5) { [0]=> int(1) [1]=> int(3) [2]=> int(2) [3]=> int(5) [4]=> int(4) } array(5) { [0]=> int(3) [1]=> int(1) [2]=> int(2) [3]=> int(5) [4]=> int(4) } array(5) { [0]=> int(2) [1]=> int(3) [2]=> int(1) [3]=> int(5) [4]=> int(4) } array(5) { [0]=> int(3) [1]=> int(2) [2]=> int(1) [3]=> int(5) [4]=> int(4) } array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(5) [3]=> int(3) [4]=> int(4) } array(5) { [0]=> int(2) [1]=> int(1) [2]=> int(5) [3]=> int(3) [4]=> int(4) } array(5) { [0]=> int(1) [1]=> int(5) [2]=> int(2) [3]=> int(3) [4]=> int(4) } array(5) { [0]=> int(5) [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) } array(5) { [0]=> int(2) [1]=> int(5) [2]=> int(1) [3]=> int(3) [4]=> int(4) } array(5) { [0]=> int(5) [1]=> int(2) [2]=> int(1) [3]=> int(3) [4]=> int(4) } array(5) { [0]=> int(1) [1]=> int(3) [2]=> int(5) [3]=> int(2) [4]=> int(4) } array(5) { [0]=> int(3) [1]=> int(1) [2]=> int(5) [3]=> int(2) [4]=> int(4) } array(5) { [0]=> int(1) [1]=> int(5) [2]=> int(3) [3]=> int(2) [4]=> int(4) } array(5) { [0]=> int(5) [1]=> int(1) [2]=> int(3) [3]=> int(2) [4]=> int(4) } array(5) { [0]=> int(3) [1]=> int(5) [2]=> int(1) [3]=> int(2) [4]=> int(4) } array(5) { [0]=> int(5) [1]=> int(3) [2]=> int(1) [3]=> int(2) [4]=> int(4) } array(5) { [0]=> int(2) [1]=> int(3) [2]=> int(5) [3]=> int(1) [4]=> int(4) } array(5) { [0]=> int(3) [1]=> int(2) [2]=> int(5) [3]=> int(1) [4]=> int(4) } array(5) { [0]=> int(2) [1]=> int(5) [2]=> int(3) [3]=> int(1) [4]=> int(4) } array(5) { [0]=> int(5) [1]=> int(2) [2]=> int(3) [3]=> int(1) [4]=> int(4) } array(5) { [0]=> int(3) [1]=> int(5) [2]=> int(2) [3]=> int(1) [4]=> int(4) } array(5) { [0]=> int(5) [1]=> int(3) [2]=> int(2) [3]=> int(1) [4]=> int(4) } array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(4) [3]=> int(5) [4]=> int(3) } array(5) { [0]=> int(2) [1]=> int(1) [2]=> int(4) [3]=> int(5) [4]=> int(3) } array(5) { [0]=> int(1) [1]=> int(4) [2]=> int(2) [3]=> int(5) [4]=> int(3) } array(5) { [0]=> int(4) [1]=> int(1) [2]=> int(2) [3]=> int(5) [4]=> int(3) } array(5) { [0]=> int(2) [1]=> int(4) [2]=> int(1) [3]=> int(5) [4]=> int(3) } array(5) { [0]=> int(4) [1]=> int(2) [2]=> int(1) [3]=> int(5) [4]=> int(3) } array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(5) [3]=> int(4) [4]=> int(3) } array(5) { [0]=> int(2) [1]=> int(1) [2]=> int(5) [3]=> int(4) [4]=> int(3) } array(5) { [0]=> int(1) [1]=> int(5) [2]=> int(2) [3]=> int(4) [4]=> int(3) } array(5) { [0]=> int(5) [1]=> int(1) [2]=> int(2) [3]=> int(4) [4]=> int(3) } array(5) { [0]=> int(2) [1]=> int(5) [2]=> int(1) [3]=> int(4) [4]=> int(3) } array(5) { [0]=> int(5) [1]=> int(2) [2]=> int(1) [3]=> int(4) [4]=> int(3) } array(5) { [0]=> int(1) [1]=> int(4) [2]=> int(5) [3]=> int(2) [4]=> int(3) } array(5) { [0]=> int(4) [1]=> int(1) [2]=> int(5) [3]=> int(2) [4]=> int(3) } array(5) { [0]=> int(1) [1]=> int(5) [2]=> int(4) [3]=> int(2) [4]=> int(3) } array(5) { [0]=> int(5) [1]=> int(1) [2]=> int(4) [3]=> int(2) [4]=> int(3) } array(5) { [0]=> int(4) [1]=> int(5) [2]=> int(1) [3]=> int(2) [4]=> int(3) } array(5) { [0]=> int(5) [1]=> int(4) [2]=> int(1) [3]=> int(2) [4]=> int(3) } array(5) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> int(1) [4]=> int(3) } array(5) { [0]=> int(4) [1]=> int(2) [2]=> int(5) [3]=> int(1) [4]=> int(3) } array(5) { [0]=> int(2) [1]=> int(5) [2]=> int(4) [3]=> int(1) [4]=> int(3) } array(5) { [0]=> int(5) [1]=> int(2) [2]=> int(4) [3]=> int(1) [4]=> int(3) } array(5) { [0]=> int(4) [1]=> int(5) [2]=> int(2) [3]=> int(1) [4]=> int(3) } array(5) { [0]=> int(5) [1]=> int(4) [2]=> int(2) [3]=> int(1) [4]=> int(3) } array(5) { [0]=> int(1) [1]=> int(3) [2]=> int(4) [3]=> int(5) [4]=> int(2) } array(5) { [0]=> int(3) [1]=> int(1) [2]=> int(4) [3]=> int(5) [4]=> int(2) } array(5) { [0]=> int(1) [1]=> int(4) [2]=> int(3) [3]=> int(5) [4]=> int(2) } array(5) { [0]=> int(4) [1]=> int(1) [2]=> int(3) [3]=> int(5) [4]=> int(2) } array(5) { [0]=> int(3) [1]=> int(4) [2]=> int(1) [3]=> int(5) [4]=> int(2) } array(5) { [0]=> int(4) [1]=> int(3) [2]=> int(1) [3]=> int(5) [4]=> int(2) } array(5) { [0]=> int(1) [1]=> int(3) [2]=> int(5) [3]=> int(4) [4]=> int(2) } array(5) { [0]=> int(3) [1]=> int(1) [2]=> int(5) [3]=> int(4) [4]=> int(2) } array(5) { [0]=> int(1) [1]=> int(5) [2]=> int(3) [3]=> int(4) [4]=> int(2) } array(5) { [0]=> int(5) [1]=> int(1) [2]=> int(3) [3]=> int(4) [4]=> int(2) } array(5) { [0]=> int(3) [1]=> int(5) [2]=> int(1) [3]=> int(4) [4]=> int(2) } array(5) { [0]=> int(5) [1]=> int(3) [2]=> int(1) [3]=> int(4) [4]=> int(2) } array(5) { [0]=> int(1) [1]=> int(4) [2]=> int(5) [3]=> int(3) [4]=> int(2) } array(5) { [0]=> int(4) [1]=> int(1) [2]=> int(5) [3]=> int(3) [4]=> int(2) } array(5) { [0]=> int(1) [1]=> int(5) [2]=> int(4) [3]=> int(3) [4]=> int(2) } array(5) { [0]=> int(5) [1]=> int(1) [2]=> int(4) [3]=> int(3) [4]=> int(2) } array(5) { [0]=> int(4) [1]=> int(5) [2]=> int(1) [3]=> int(3) [4]=> int(2) } array(5) { [0]=> int(5) [1]=> int(4) [2]=> int(1) [3]=> int(3) [4]=> int(2) } array(5) { [0]=> int(3) [1]=> int(4) [2]=> int(5) [3]=> int(1) [4]=> int(2) } array(5) { [0]=> int(4) [1]=> int(3) [2]=> int(5) [3]=> int(1) [4]=> int(2) } array(5) { [0]=> int(3) [1]=> int(5) [2]=> int(4) [3]=> int(1) [4]=> int(2) } array(5) { [0]=> int(5) [1]=> int(3) [2]=> int(4) [3]=> int(1) [4]=> int(2) } array(5) { [0]=> int(4) [1]=> int(5) [2]=> int(3) [3]=> int(1) [4]=> int(2) } array(5) { [0]=> int(5) [1]=> int(4) [2]=> int(3) [3]=> int(1) [4]=> int(2) } array(5) { [0]=> int(2) [1]=> int(3) [2]=> int(4) [3]=> int(5) [4]=> int(1) } array(5) { [0]=> int(3) [1]=> int(2) [2]=> int(4) [3]=> int(5) [4]=> int(1) } array(5) { [0]=> int(2) [1]=> int(4) [2]=> int(3) [3]=> int(5) [4]=> int(1) } array(5) { [0]=> int(4) [1]=> int(2) [2]=> int(3) [3]=> int(5) [4]=> int(1) } array(5) { [0]=> int(3) [1]=> int(4) [2]=> int(2) [3]=> int(5) [4]=> int(1) } array(5) { [0]=> int(4) [1]=> int(3) [2]=> int(2) [3]=> int(5) [4]=> int(1) } array(5) { [0]=> int(2) [1]=> int(3) [2]=> int(5) [3]=> int(4) [4]=> int(1) } array(5) { [0]=> int(3) [1]=> int(2) [2]=> int(5) [3]=> int(4) [4]=> int(1) } array(5) { [0]=> int(2) [1]=> int(5) [2]=> int(3) [3]=> int(4) [4]=> int(1) } array(5) { [0]=> int(5) [1]=> int(2) [2]=> int(3) [3]=> int(4) [4]=> int(1) } array(5) { [0]=> int(3) [1]=> int(5) [2]=> int(2) [3]=> int(4) [4]=> int(1) } array(5) { [0]=> int(5) [1]=> int(3) [2]=> int(2) [3]=> int(4) [4]=> int(1) } array(5) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> int(3) [4]=> int(1) } array(5) { [0]=> int(4) [1]=> int(2) [2]=> int(5) [3]=> int(3) [4]=> int(1) } array(5) { [0]=> int(2) [1]=> int(5) [2]=> int(4) [3]=> int(3) [4]=> int(1) } array(5) { [0]=> int(5) [1]=> int(2) [2]=> int(4) [3]=> int(3) [4]=> int(1) } array(5) { [0]=> int(4) [1]=> int(5) [2]=> int(2) [3]=> int(3) [4]=> int(1) } array(5) { [0]=> int(5) [1]=> int(4) [2]=> int(2) [3]=> int(3) [4]=> int(1) } array(5) { [0]=> int(3) [1]=> int(4) [2]=> int(5) [3]=> int(2) [4]=> int(1) } array(5) { [0]=> int(4) [1]=> int(3) [2]=> int(5) [3]=> int(2) [4]=> int(1) } array(5) { [0]=> int(3) [1]=> int(5) [2]=> int(4) [3]=> int(2) [4]=> int(1) } array(5) { [0]=> int(5) [1]=> int(3) [2]=> int(4) [3]=> int(2) [4]=> int(1) } array(5) { [0]=> int(4) [1]=> int(5) [2]=> int(3) [3]=> int(2) [4]=> int(1) } array(5) { [0]=> int(5) [1]=> int(4) [2]=> int(3) [3]=> int(2) [4]=> int(1) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/o0Bp6 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/o0Bp6 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/o0Bp6 on line 3
Process exited with code 255.