3v4l.org

run code in 300+ PHP versions simultaneously
<?php function computeCombination(array $source,$picks,$startIndex=0,array $pad=array()) { if($picks<=0) { return $pad; } elseif($picks>=count($source)-$startIndex) { return array(array_merge($pad,array_slice($source,$startIndex))); } $result=array(); foreach(range($startIndex,count($source)-$picks) as $subStartIndex) { $subPad=$pad; $subPad[]=$source[$subStartIndex]; if(empty($pad))// to make the output look nice { $result=array_merge($result,computeCombination($source,$picks-1,$subStartIndex+1,$subPad)); } else { $result=array_merge($result,array(computeCombination($source,$picks-1,$subStartIndex+1,$subPad))); } } return $result; } print_r(computeCombination(array(1,2,3,4,5),2));
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [0] => 1 [1] => 2 ) [1] => Array ( [0] => 1 [1] => 3 ) [2] => Array ( [0] => 1 [1] => 4 ) [3] => Array ( [0] => 1 [1] => 5 ) [4] => Array ( [0] => 2 [1] => 3 ) [5] => Array ( [0] => 2 [1] => 4 ) [6] => Array ( [0] => 2 [1] => 5 ) [7] => Array ( [0] => 3 [1] => 4 ) [8] => Array ( [0] => 3 [1] => 5 ) [9] => Array ( [0] => 4 [1] => 5 ) )

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

preferences:
48.83 ms | 403 KiB | 8 Q