You may already know how to sort an array in PHP using various array sorting functions like sort, asort, ksort, arsort, krsort.

Here we discuss how to sort a multi dimensional array in PHP.

Sorting Multi Dimensional Array in PHP by Key-Value

I have created a function like following to sort multi dimensional array in PHP using a specific key-value.

//Products Array
$products = [
	[
		'id' => 1,
		'title' => 'Laptop',
		'stock' => 12,
	],[
		'id' => 2,
		'title' => 'Mobile',
		'stock' => 30,
	],[
		'id' => 3,
		'title' => 'USB Cable',
		'stock' => 5,
	],[
		'id' => 4,
		'title' => 'Power Bank',
		'stock' => 53,
	],[
		'id' => 5,
		'title' => 'Mobile Charger',
		'stock' => 28,
	],
];

//Sort array by stock in descending order
$sorted_products = sort_array_by_key($products, 'stock');
print_r($sorted_products);


//Function to sort array by key
function sort_array_by_key($array, $sort_key){
	$key_array = array_column($array, $sort_key);
	array_multisort($key_array, SORT_DESC, $array); //or SORT_ASC
	return $array;
}

Output

/**
OUTPUT
*/
Array
(
    [0] => Array
        (
            [id] => 4
            [title] => Power Bank
            [stock] => 53
        )

    [1] => Array
        (
            [id] => 2
            [title] => Mobile
            [stock] => 30
        )

    [2] => Array
        (
            [id] => 5
            [title] => Mobile Charger
            [stock] => 28
        )

    [3] => Array
        (
            [id] => 1
            [title] => Laptop
            [stock] => 12
        )

    [4] => Array
        (
            [id] => 3
            [title] => USB Cable
            [stock] => 5
        )

)