I have this array of attributes for example:

```
Array
(

    [0] => Array
        (
            [id] => 20
            [title] => Brown
            [parent_id] => 1
            [parent_title] => Color
            [isMultiple] => 1
        )

    [1] => Array
        (
            [id] => 21
            [title] => Cream
            [parent_id] => 1
            [parent_title] => Color
            [isMultiple] => 1
        )

    [2] => Array
        (
            [id] => 61
            [title] => S
            [parent_id] => 2
            [parent_title] => Size
            [isMultiple] => 1
        )

    [3] => Array
        (
            [id] => 62
            [title] => M
            [parent_id] => 2
            [parent_title] => Size
            [isMultiple] => 1
        )

    [4] => Array
        (
            [id] => 63
            [title] => L
            [parent_id] => 2
            [parent_title] => Size
            [isMultiple] => 1
        )

)

```

from this array we can understand that we have 6 variations of inventory:

```
1 | Brown | S
2 | Brown | M
3 | Brown | L
4 | Cream | S
5 | Cream | M
6 | Cream | L

```

1. What is the correct way to loop over this array to create another array of the 6 variations like in the above example.
2. let's assume that I have another 2 attrs in the array like this:

```
 [5] => Array
     (
         [id] => 64
         [title] => Cotton
         [parent_id] => 3
         [parent_title] => Metiral
         [isMultiple] => 1
     )

 [6] => Array
     (
         [id] => 65
         [title] => Wool
         [parent_id] => 3
         [parent_title] => Metiral
         [isMultiple] => 1
     )

```

How I can loop on this array to create variations like these:

```
1 | Brown | S | wool
2 | Brown | S | cotton
3 | Brown | M | wool
4 | Brown | M | cotton
5 | Brown | L | wool
6 | Brown | L | cotton
7 | Cream | S | wool
8 | Cream | S | cotton
9 | Cream | M | wool
10 | Cream| M | cotton
11 | Cream| L | wool
12 | Cream| L | cotton

```