Create 2 dimensional array from 1 dimensional - php

Question

How from this array:
Array
(
[0] => Array
(
[BLACK] => Array
(
[0] => 3171
[1] => 3173
[2] => 3175
)
[WHITE] => Array
(
[0] => 3170
[1] => 3172
[2] => 3174
)
)
[1] => Array
(
[SMALL] => Array
(
[0] => 3170
[1] => 3171
)
[MEDIUM] => Array
(
[0] => 3172
[1] => 3173
)
[LARGE] => Array
(
[0] => 3174
[1] => 3175
)
)
)
I could create something like this:
$array['BLACK']['SMALL'] = 3171;
$array['BLACK']['MEDIUM'] = 3173;
$array['BLACK']['LARGE'] = 3175;
$array['WHITE']['SMALL'] = 3170;
$array['WHITE']['MEDIUM'] = 3172;
$array['WHITE']['LARGE'] = 3174;
so create 2 dimensional array from 1 dimensional, where option is same.

Answer 1

<?php
$colors = array('BLACK' => array('3171','3173','3175'),'WHITE' => array('3170','3172','3174'));
$sizes = array('SMALL' => array('3170','3171'),'MEDIUM' => array('3172','3173'), 'LARGE' => array('3174','3175'));
$merged = array();
foreach ($colors as $c_key => $color) {
foreach ($color as $c_val) {
foreach ($sizes as $s_key => $size) {
foreach ($size as $s_val) {
if ($c_val == $s_val) {
$merged[$c_key][$s_key] = $c_val;
}
}
}
}
}
// var_dump($merged);
?>