PHP - Convert multidimensional associative array's key strings into numbers

Question

I have a multidimensional associative array like this:

$type = Array(
  [unit-1] = Array(
    [taxon-1] = Array(
      [0] = Array(
        [a] = 1,
        [b] = 1,
        [c] = 'string1'
      ),
      [1] = Array(
        [a] = 1,
        [b] = 1,
        [c] = 'string2'
      ),
    ),
    [taxon-2] = Array(
      [0] = Array(
        [a] = 1,
        [b] = 2,
        [c] = 'string3'
      ),
      [1] = Array(
        [a] = 1,
        [b] = 2,
        [c] = 'string4'
      ),
    ),
  [unit-2] = Array(
    [taxon-1] = Array(
      [0] = Array(
        [a] = 2,
        [b] = 1,
        [c] = 'string5'
      ),
      [1] = Array(
        [a] = 2,
        [b] = 1,
        [c] = 'string6'
      ),
    ),
    [taxon-2] = Array(
      [0] = Array(
        [a] = 2,
        [b] = 2,
        [c] = 'string7'
      ),
      [1] = Array(
        [a] = 2,
        [b] = 2,
        [c] = 'string8'
      ),
    ),
  )

How do I convert all the associative keys (unit-1, unit-2... and taxon-1, taxon-2...) into ordinals (0, 1... and 0, 1...). Do I need to use a foreach loop, and if yes, how would it go?

Please note that there is not a finite number of units and taxons in the array.

Cameron Martin · Accepted Answer · 2012-06-06 18:48:09Z

9

If there's definitely two levels:

$type = array_values(array_map('array_values', $type));

To re-index all array keys from an array:

function array_reindex($array) {
    if(is_array($array)) {
        return array_map('array_reindex', array_values($array));
    } else {
        return $array;
    }
}

Haven't tested it but it should work.

edited Jun 6, 2012 at 18:48

answered Jun 6, 2012 at 18:35

Cameron Martin

6,0102 gold badges45 silver badges55 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Томица Кораћ Over a year ago

Splendid. This worked like a charm. Thanks a lot. Yes, for now I only need two levels. Just wondering though, how much more complicated would it be if there were more levels?

Cameron Martin Over a year ago

Updated my answer with a function to recursively re-index an array.

blockhead · Accepted Answer · 2012-06-06 18:20:32Z

0

You can use array_values for that.

answered Jun 6, 2012 at 18:20

blockhead

9,7053 gold badges46 silver badges69 bronze badges

1 Comment

Томица Кораћ Over a year ago

Indeed I can, and it would work perfectly, but only for the first level of keys, i.e. unit-1, unit-2... Taxon keys would not be changed. How can I utilize array_values to apply recursively deeper into the array?

Collectives™ on Stack Overflow

PHP - Convert multidimensional associative array's key strings into numbers

2 Answers 2

2 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related