Sort a multi dimensional array on a column

array_qsort2.php

<?php

/*
 * Sort a multidimensional array on a column
 *
 * For example:
 * <code>
 * <?php array_qsort2($users, "username", "ASC"); ?>
 * </code>
 *
 * @param array $array array with hash array
 * @param mixed $column key that you want to sort on
 * @param enum $order asc or desc
 */
function array_qsort2 (&$array, $column=0, $order="ASC") 
{
    $oper = ($order == "ASC")?">":"<";
 
    if(!is_array($array)) return;
 
    usort($array, create_function('$a,$b',"return (\$a['$column'] $oper \$b['$column']);")); 
 
    reset($array);
}