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<?php $words=array("A", "B", "C", "D"); $combos=array(); print_r(getAllWordCombos($words,$combos, array())); function getAllWordCombos($words, &$combos, $partial) { if (count($words)==1) $combos[]=array_merge($partial,$words); else { foreach ($words as $i=>$first) { $cwords=array_slice($words,0); array_splice($cwords,$i,1); getAllWordCombos($cwords, $combos, array_merge($partial,array($first))); } } }
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
preferences:
299.85 ms | 406 KiB | 457 Q