Sorting an array by Key.

<?php
/*
Array
(
    [0] => Array
        (
            [hashtag] => a7e87329b5eab8578f4f1098a152d6f4
            [title] => Flower
            [order] => 3
        )

    [1] => Array
        (
            [hashtag] => b24ce0cd392a5b0b8dedc66c25213594
            [title] => Free
            [order] => 2
        )

    [2] => Array
        (
            [hashtag] => e7d31fc0602fb2ede144d18cdffd816b
            [title] => Ready
            [order] => 1
        )
)
*/
function aasort (&$array, $key) {
	$sorter = array();
	$ret = array();
	reset($array);
	foreach ($array as $ii => $va) {
	    $sorter[$ii] = $va[$key];
	}
	asort($sorter);
	foreach ($sorter as $ii => $va) {
	    $ret[$ii] = $array[$ii];
	}
	$array = $ret;
}
aasort($your_array,"order");
?>