<?php function combs($arr) { $result = array(); $cntArr = count($arr); for ($i = 0; $i < $cntArr; ++$i) { for ($j = $cntArr-$i; $j > 0; --$j) { $result[$j][] = implode(', ', array_slice($arr, $i, $j)); } } array_shift($result); return $result; } $arr = array('a', 'b', 'c', 'd', 'e', 'f'); print_r(combs($arr));
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