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<?php function permutation(array $arr) { while($ele=array_shift($arr)) { $x=$ele; echo $x."\n"; foreach($arr as $rest) { $x.=" $rest"; echo $x."\n"; } } } permutation(array("A","B","C","X","x","x"));
Output for git.master, git.master_jit, rfc.property-hooks
A A B A B C A B C X A B C X x A B C X x x B B C B C X B C X x B C X x x C C X C X x C X x x X X x X x x x x x x

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