Create an array regrouping all possibilities of another multidimentionnal array - php

Question

I have small difficulties to convert an array as I want, need some help from pros.
I have an array like that :
$inputs = array(
'size' => array(
's' => 's',
'm' => 'm',
'l' => 'l',
),
'color' => array(
'red' => 'red',
'blue' => 'blue',
),
'option' => 'option 1',
);
From this values, I need to create an array that combine all possibilities, like that :
$possibilities = array(
0 => array('size' => 's', 'color' => 'red', 'option' => 'option 1'),
1 => array('size' => 'm', 'color' => 'red', 'option' => 'option 1'),
2 => array('size' => 'l', 'color' => 'red', 'option' => 'option 1'),
3 => array('size' => 's', 'color' => 'blue', 'option' => 'option 1'),
4 => array('size' => 'm', 'color' => 'blue', 'option' => 'option 1'),
5 => array('size' => 'l', 'color' => 'blue', 'option' => 'option 1'),
);
I precise that I'm on laravel so I can use the collection methods, but even with this helpers methods, I can't find a way to obtain the $possibilities array I want.
The original array is dynamic (can have more options with different label names), so I need something that is able to work no matter the size of the array neither the name of the labels.

Answer 1

Please try this, I hope it'll help you.
<?php
$inputs = array(
'size' => array(
's' => 's',
'm' => 'm',
'l' => 'l',
),
'color' => array(
'red' => 'red',
'blue' => 'blue',
),
'option' => 'option 1',
);
$combinations = [[]];
$length = count($inputs);
foreach (array_keys($inputs) as $key) {
$tmp = [];
foreach ($combinations as $v1) {
if (is_array($inputs[$key])) {
foreach ($inputs[$key] as $v2) {
$tmp[] = array_merge($v1, [$key => $v2]);
}
} else {
$tmp[] = array_merge($v1, [$key => $inputs[$key]]);
}
}
$combinations = $tmp;
}
echo "<pre>";
print_r($combinations);
?>

Answer 2

$output = array();
foreach($inputs['size'] as $size)
{
foreach($inputs['colour'] as $colour)
{
foreach($inputs['option'] as $option)
{
$output[] = array('size' => $size, 'colour' => $colour, 'option' => $option);
}
}
}
return $output;
Update :
$collection = collect($inputs[0]);
array_shift($inputs);
$matrix = $collection->crossJoin($inputs);
$matrix->all();
Update :
$collection = collect(array_shift($inputs));
$matrix = $collection->crossJoin($inputs);
$matrix->all();
Update :
use this function
function combinations($arrays, $i = 0) {
if (!isset($arrays[$i])) {
return array();
}
if ($i == count($arrays) - 1) {
return $arrays[$i];
}
// get combinations from subsequent arrays
$tmp = combinations($arrays, $i + 1);
$result = array();
// concat each array from tmp with each element from $arrays[$i]
foreach ($arrays[$i] as $v) {
foreach ($tmp as $t) {
$result[] = is_array($t) ?
array_merge(array($v), $t) :
array($v, $t);
}
}
return $result;
}