Array parsing php - php

Question

How to get from array:
$a = [
'color' => ['red', 'blue', ....∞],
'size' => ['10 -12 ', '12 -14', ....∞],
.....∞
];
such an array
$b = [
['color' => 'red', 'size' => '10 -12 '],
['color' => 'blue', 'size' => '10 -12 '],
['color' => 'red', 'size' => '12 -14 '],
['color' => 'blue', 'size' => '12 -14 '],
];
keys and values can be any number,
the names of keys and values can be different
php cross join
I tried to do it, but it's limited
foreach($a['color'] as $k1 => $v1){
foreach($a['size'] as $k2 => $v2){
$d[] = ['color' => $v1, 'size' => $v2];
}
}

Answer 1

no one here can solve it, apparently it's difficult, I found a solution
Solution 1
function cross($array)
{
$result = [];
$current = array_splice($array, -1);
foreach ($current as $key => $values) {
foreach ( $values as $value) {
if (empty($array)) {
array_push($result, [$key => $value]);
} else {
foreach (cross($array) as $temp) {
array_push($result, array_merge([$key => $value], $temp));
}
}
}
}
return $result;
}
print_r(cross($a));
Solution 2
function cartesian($input) {
$result = array();
while (list($key, $values) = each($input)) {
// If a sub-array is empty, it doesn't affect the cartesian product
if (empty($values)) {
continue;
}
// Seeding the product array with the values from the first sub-array
if (empty($result)) {
foreach($values as $value) {
$result[] = array($key => $value);
}
}
else {
// Second and subsequent input sub-arrays work like this:
// 1. In each existing array inside $product, add an item with
// key == $key and value == first item in input sub-array
// 2. Then, for each remaining item in current input sub-array,
// add a copy of each existing array inside $product with
// key == $key and value == first item of input sub-array
// Store all items to be added to $product here; adding them
// inside the foreach will result in an infinite loop
$append = array();
foreach($result as &$product) {
// Do step 1 above. array_shift is not the most efficient, but
// it allows us to iterate over the rest of the items with a
// simple foreach, making the code short and easy to read.
$product[$key] = array_shift($values);
// $product is by reference (that's why the key we added above
// will appear in the end result), so make a copy of it here
$copy = $product;
// Do step 2 above.
foreach($values as $item) {
$copy[$key] = $item;
$append[] = $copy;
}
// Undo the side effecst of array_shift
array_unshift($values, $product[$key]);
}
// Out of the foreach, we can add to $results now
$result = array_merge($result, $append);
}
}
return $result;
}

Answer 2

Is this what you are trying to achieve? Note that for it to work correctly, the number of parameters for color and size must be the same!
<?php
$b = ['color' => ['red', 'blue', 'yellow'],'size' => ['10 -12 ', '12 -14', '12-16']];
for ($counter=0; $counter < sizeof($b['color']) ; $counter++) {
$d[$counter]['color'] = $b['color'][$counter];
$d[$counter]['size'] = $b['size'][$counter];
}
echo "<pre>";
print_r($d);
?>