[RESOLVED] Multi Dimensional Array Combonations

[nanoc]

I have a multi dimensional array, the number of arrays in this array can change.

Each array within the multi dimensional array can contain 2 or more values.

I need to figure out all the possible combinations.

example:

I have:
$array = array(array(a,b,c,d),array(1,2,3,4));

I need:
$array[0] = array(a,1);
$array[1] = array(a,2);
$array[2] = array(a,3);
$array[3] = array(a,4);
$array[4] = array(b,1);
...
$array[16] = array(d,4);

Thank you for any help!

[NogDog]

What do you want to do with:

$array = array(
   array('a', 'b', 'c', 'd'),
   array(1, 2, 3, 4),
   array('red', 'green', 'blue')
);

I.e.: do you want all possible pairs, or would you also want all trios (or would this never happen)?

[nanoc]

I need all the possible combinations regardless of the number of arrays.

If there are 2 arrays, i need all the combos, if there are 100 arrays, i need all the combos.

There will be no set number of arrays or array values. It all depends on the options that are selected.

[laserlight]

You could try something along these lines:

<?php

$array = array(
   array('a', 'b', 'c', 'd'),
   array(1, 2, 3, 4),
   array('red', 'green', 'blue')
);

$result = array();
foreach ($array[0] as $value) {
    $result[] = array($value);
}

for ($i = 1; $i < count($array); ++$i) {
    $next_result = array();
    foreach ($result as $key => $result_value) {
        foreach ($array[$i] as $value) {
            $next_result[] = array_merge($result_value, array($value));
        }
    }
    $result = $next_result;
}

print_r($result);

[nanoc]

You are awesome!!!

Thank you so much!

🙂🙂🙂🙂

[laserlight]

Thanks, but before you rejoice too much, be warned that this is not necessarily the most efficient implementation, and that I neglected to do a customary check that the array actually has one element which is itself an array.