Question

I want to add an element to every array in my multidimensional array.

My array is like this:

 Array
(
    [0] => Array
        (
            [RatingFactorPreferenceID] => 10
            [PreferenceID] => 45
            [RatedValue] => 1
            [CreatedOn] => 1326779061
            [CreatedBy] => 25
        )

    [1] => Array
        (
            [RatingFactorPreferenceID] => 20
            [PreferenceID] => 45
            [RatedValue] => 2
            [CreatedOn] => 1326779061
            [CreatedBy] => 25
        )

)

I want to add [RatingID] => 2 to both arrays, then my final array would look like:

 Array
(
    [0] => Array
        (
            [RatingID] => 2
            [RatingFactorPreferenceID] => 10
            [PreferenceID] => 45
            [RatedValue] => 1
            [CreatedOn] => 1326779061
            [CreatedBy] => 25
        )

    [1] => Array
        (
            [RatingID] => 2
            [RatingFactorPreferenceID] => 20
            [PreferenceID] => 45
            [RatedValue] => 2
            [CreatedOn] => 1326779061
            [CreatedBy] => 25
        )

)

I can loop over my array and do this, is there a better way to do this?

Answer 1

$array = array_map(function ($a) { return $a + array('RatingID' => 2); }, $array);

This still loops, but behind the scenes, if you prefer that.
You could also use array_walk, but that’s really just looping disguised in a different syntax.