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Recursive functions, I can never find exactly what I need in a pinch
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<?php | |
function combos($data, &$all = array(), $group = array(), $val = null, $i = 0) { | |
if (isset($val)) { | |
array_push($group, $val); | |
} | |
if ($i >= count($data)) { | |
array_push($all, $group); | |
} else { | |
foreach ($data[$i] as $v) { | |
combos($data, $all, $group, $v, $i + 1); | |
} | |
} | |
return $all; | |
} | |
$data = array( | |
array('a', 'b'), | |
array('e', 'f', 'g'), | |
array('w', 'x', 'y', 'z'), | |
); | |
$combos = combos($data); | |
echo '<pre>'; print_r($combos); echo '</pre>'; |
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Array | |
( | |
[0] => Array | |
( | |
[0] => a | |
[1] => e | |
[2] => w | |
) | |
[1] => Array | |
( | |
[0] => a | |
[1] => e | |
[2] => x | |
) | |
[2] => Array | |
( | |
[0] => a | |
[1] => e | |
[2] => y | |
) | |
[3] => Array | |
( | |
[0] => a | |
[1] => e | |
[2] => z | |
) | |
[4] => Array | |
( | |
[0] => a | |
[1] => f | |
[2] => w | |
) | |
[5] => Array | |
( | |
[0] => a | |
[1] => f | |
[2] => x | |
) | |
[6] => Array | |
( | |
[0] => a | |
[1] => f | |
[2] => y | |
) | |
[7] => Array | |
( | |
[0] => a | |
[1] => f | |
[2] => z | |
) | |
[8] => Array | |
( | |
[0] => a | |
[1] => g | |
[2] => w | |
) | |
[9] => Array | |
( | |
[0] => a | |
[1] => g | |
[2] => x | |
) | |
[10] => Array | |
( | |
[0] => a | |
[1] => g | |
[2] => y | |
) | |
[11] => Array | |
( | |
[0] => a | |
[1] => g | |
[2] => z | |
) | |
[12] => Array | |
( | |
[0] => b | |
[1] => e | |
[2] => w | |
) | |
[13] => Array | |
( | |
[0] => b | |
[1] => e | |
[2] => x | |
) | |
[14] => Array | |
( | |
[0] => b | |
[1] => e | |
[2] => y | |
) | |
[15] => Array | |
( | |
[0] => b | |
[1] => e | |
[2] => z | |
) | |
[16] => Array | |
( | |
[0] => b | |
[1] => f | |
[2] => w | |
) | |
[17] => Array | |
( | |
[0] => b | |
[1] => f | |
[2] => x | |
) | |
[18] => Array | |
( | |
[0] => b | |
[1] => f | |
[2] => y | |
) | |
[19] => Array | |
( | |
[0] => b | |
[1] => f | |
[2] => z | |
) | |
[20] => Array | |
( | |
[0] => b | |
[1] => g | |
[2] => w | |
) | |
[21] => Array | |
( | |
[0] => b | |
[1] => g | |
[2] => x | |
) | |
[22] => Array | |
( | |
[0] => b | |
[1] => g | |
[2] => y | |
) | |
[23] => Array | |
( | |
[0] => b | |
[1] => g | |
[2] => z | |
) | |
) |
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