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<?php function combs($arr) { $combs = array_fill(0, count($arr)+1, array()); $cntArr = count($arr); for ($i = 0; $i < $cntArr; ++$i) { for ($j = $cntArr-$i; $j > 0; --$j) { $combs[$j][] = implode(', ', array_slice($arr, $i, $j)); } } return $combs; } $arr = array('a', 'b', 'c', 'd', 'e', 'f'); print_r(combs($arr));
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 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 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
Array ( [0] => Array ( ) [1] => Array ( [0] => a [1] => b [2] => c [3] => d [4] => e [5] => f ) [2] => Array ( [0] => a, b [1] => b, c [2] => c, d [3] => d, e [4] => e, f ) [3] => Array ( [0] => a, b, c [1] => b, c, d [2] => c, d, e [3] => d, e, f ) [4] => Array ( [0] => a, b, c, d [1] => b, c, d, e [2] => c, d, e, f ) [5] => Array ( [0] => a, b, c, d, e [1] => b, c, d, e, f ) [6] => Array ( [0] => a, b, c, d, e, f ) )
preferences:
226.1 ms | 407 KiB | 343 Q