Reorder PHP array based on a common value

Question

The only thing i care about here is sizes. I need to break into a new level of array and add it in, grouping them together.

I essentially need them all in grouped in their own array so i can loop through them and do something else.

Current Array:

[0] => Array 
    (
         [name] => random name 2
         [sizes] => ["XS","S","M","L","XL","XXL"]
    )
[1] => Array
    (
         [name] => random name 1
         [sizes] => One Size
    )
[2] => Array
    (
         [name] => random name 3
         [sizes] => ["XS","S","M","L","XL","XXL"]
    )

Wanted:

[0] => Array 
    (
         [0] => Array
            (
                 [name] => random name 1
                 [sizes] => One Size
            )
    )
[1] => Array
    (
         [0] => Array
            (
                [name] => random name 2
                [sizes] => ["XS","S","M","L","XL","XXL"]
            )
         [1] => Array
            (
                [name] => random name 3
                [sizes] => ["XS","S","M","L","XL","XXL"]
            )
    )

The 3 is random, just ignore that, ill change now. If it has size range S -> L then ill want it to group exactly like the two above, in [2] => Array() — Brad Archer
– Brad Archer, Commented Jul 24, 2020 at 15:53

Andreas · Accepted Answer · 2020-07-24 16:20:36Z

1

Loop the array and create a new array with the size as the key for now.
Later with array_values we remove the associative keys.

foreach($arr as $item){
    $new[$item['sizes']][] = $item;
}
$new = array_values($new); // remove associative

edited Jul 24, 2020 at 16:20

answered Jul 24, 2020 at 16:07

Andreas

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2 Comments

Andreas Over a year ago

@GrumpyCrouton Not sure I understand what you mean. The key in the example above will be the string "sizes". Yes it does look like an array but print_r would not have printed it that way if it was an array.

Andreas Over a year ago

Yes.. If it was not print_r would have written it as [sizes] => array( ...... but it doesn't. Not that none of the other strings are enclosed with " but they are still strings.

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