PHP SORT MULTIDIMENSIONAL ARRAY

exted.php

// To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.

usort($myArray, function($a, $b) {
    $retval = $a['order'] <=> $b['order'];
    if ($retval == 0) {
        $retval = $a['suborder'] <=> $b['suborder'];
        if ($retval == 0) {
            $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder'];
        }
    }
    return $retval;
});

v5.2-earlier.php

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

v5.3.php

usort($myArray, function($a, $b) {
    return $a['order'] - $b['order'];
});

v7.php

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});