二维数组排序

//二维数组排序， $arr是数据，$keys是排序的健值，$order是排序规则，1是升序，0是降序
function array_sort($arr, $keys, $order = 0)
{
    if (!is_array($arr)) {
        return false;
    }
    $keysvalue = array();
    foreach ($arr as $key => $val) {
        $keysvalue[$key] = $val[$keys];
    }
    if ($order == 0) {
        asort($keysvalue);
    } else {
        arsort($keysvalue);
    }
    reset($keysvalue);
    foreach ($keysvalue as $key => $vals) {
        $keysort[$key] = $key;
    }
    $new_array = array();
    foreach ($keysort as $key => $val) {
        $new_array[$key] = $arr[$val];
    }
    return $new_array;
}