Question

I have the following array, which is a load of arrays nested in a bigger array:

Array
(
    [0] => Array
        (
            [vote_for] => 15
        )

    [1] => Array
        (
            [vote_for] => 15
        )

    [2] => Array
        (
            [vote_for] => 15
        )

    [3] => Array
        (
            [vote_for] => 5
        )

    [4] => Array
        (
            [vote_for] => 5
        )

    [5] => Array
        (
            [vote_for] => 2
        )

    [6] => Array
        (
            [vote_for] => 2
        )

    [7] => Array
        (
            [vote_for] => 2
        )

    [8] => Array
        (
            [vote_for] => 2
        )

    [9] => Array
        (
            [vote_for] => 2
        )

    [10] => Array
        (
            [vote_for] => 2
        )

    [11] => Array
        (
            [vote_for] => 2
        )

    [12] => Array
        (
            [vote_for] => 2
        )

    [13] => Array
        (
            [vote_for] => 2
        )

    [14] => Array
        (
            [vote_for] => 2
        )

)

I want to do the equivalent of array_count_values on this array, such that I get 15 => 3, 5 => 2 and 2 => 10. How do I un-nest the arrays to do this?

Answer 1

You may want to try reforming your array to count:

$count_array = array();
foreach ($arr as $v) {
   $count_array[] = $v['vote_for'];
}

// Now get the counts
$the_count = array_count_values($count_array);