How to sort a multidimensional array by a certain key?

Question

This should be really simple, but what is the way to go on this. I want to sort an multidimensional array by a key, like this:

Array (
[0] => Array
    (         


        

Answer 1

Try this

function cmp_by_status($a, $b)
{
    if ($a['status'] == $b['status']) {
        return 0;
    }
    return ($a['status'] < $b['status') ? -1 : 1;
}

usort($data_array, "cmp_by_status");

Answer 2

usort function is what you're looking for:

<?php
    function cmp($a, $b) {
        return $b["status"] - $a["status"];
    }

    $sorted = usort($your_array, "cmp");
    var_dump($sorted);
?>

Answer 3

Try this : Using array_multisort

$sort = array();
foreach($your_array as $k=>$v) {
    $sort['status'][$k] = $v['status'];
}

array_multisort($sort['status'], SORT_DESC, $your_array);


echo "<pre>";
print_r($your_array);

Ref: http://php.net/manual/en/function.array-multisort.php

Answer 4

//define a comparison function
function cmp($a, $b) {
    if ($a['status'] == $b['status']) {
        return 0;
    }
    return ($a['status'] < $b['status']) ? -1 : 1;
}

usort($array, "cmp");

That should do what you want, you can alter the comparison function to sort on whatever key you want.

Answer 5

I have added this answer at Sort multi-dimensional array by specific key sort the array specific key to sorting array value.

function sortBy($field, &$array, $direction = 'asc')
{
    usort($array, create_function('$a, $b', '
        $a = $a["' . $field . '"];
        $b = $b["' . $field . '"];

        if ($a == $b)
        {
            return 0;
        }

        return ($a ' . ($direction == 'desc' ? '>' : '<') .' $b) ? -1 : 1;
    '));

    return true;
}

Call this function by specific array key

sortBy('status',   $array);