Counting the values of an array with nesting

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?

Bailey Parker · Accepted Answer · 2012-07-29 02:51:47Z

2

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);

edited Jul 29, 2012 at 2:51

Bailey Parker

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answered Jul 29, 2012 at 2:50

David

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1 Comment

David Over a year ago

Thanks PhpMyCoder. I started with a different method and then changed mid-way, forgetting to update the foreach() to a different level. Much appreciated!

Justin John · Accepted Answer · 2012-07-29 03:17:17Z

1

I think array map will also work for this

$count_array = array_map(function($item) { return $item['vote_for']; }, $array);
$the_count = array_count_values($count_array);

answered Jul 29, 2012 at 3:17

Justin John

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