Adding to a Multidimensional Array

Question

Here's my code:

$get_access_keys_from_wp = get_user_meta( $user_id, '_tdv_volunteer_positions' );
$new_access_keys = array();    

if ( $get_access_keys_from_wp ) {
            echo "This user is signed up for other positions.";

            $current_access_keys = $get_access_keys_from_wp;

            foreach($current_access_keys as $key => $value) {
                $new_access_keys[] = $value;
            }
            //$new_access_keys[] = $position_post_id;
            $new_access_keys[] = array('position_id' => $position_post_id, 'volunteer_first_name' => $first_name, 'volunteer_last_name' => $last_name);

        } else {
            echo "This user is not signed up for any positions.";

            //$new_access_keys[] = $position_post_id;
            $new_access_keys[] = array('position_id' => $position_post_id, 'volunteer_first_name' => $first_name, 'volunteer_last_name' => $last_name);

        }

Initially, I get the following:

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [position_id] => 67
                    [volunteer_first_name] => Mike
                    [volunteer_last_name] => Jackson
                )

        )

)

And that's great ... I want it like this. But as you can see by the logic above, I need to be able to loop over the array if it already exists, and add to it so that it looks like the following:

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [position_id] => 67
                    [volunteer_first_name] => Mike
                    [volunteer_last_name] => Jackson
                )
            [1] => Array
                (
                    [position_id] => 68
                    [volunteer_first_name] => Mike
                    [volunteer_last_name] => Jackson
                )

        )

)

But instead, I'm getting results like this:

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [0] => Array
                        (
                            [position_id] => 67
                            [volunteer_first_name] => Mike
                            [volunteer_last_name] => Jackson
                        )

                )

            [1] => Array
                (
                    [position_id] => 68
                    [volunteer_first_name] => Mike
                    [volunteer_last_name] => Jackson
                )

        )

)

I don't think that copying $get_access_keys_from_wp in $current_access_keys is necessary, since you don't seem to modify either afterwards. — didierc
– didierc, Commented Jun 17, 2014 at 22:49

FuzzyTree · Accepted Answer · 2014-06-17 23:06:14Z

2

It seems you need to go 1 level deeper when adding existing values. Try replacing

foreach($current_access_keys as $key => $value) {
    $new_access_keys[] = $value;
}

with

foreach($current_access_keys as $key => $value) {
    $new_access_keys[] = $value[0];
}

or if the existing array contains more than 1 element

foreach($current_access_keys as $key => $value) {
    $new_access_keys = array_merge($new_access_keys,$value);
}

edited Jun 17, 2014 at 23:06

answered Jun 17, 2014 at 22:55

FuzzyTree

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