php 二维数组根据字段值排序

/** * 二维数组排序 * @param $arr * @param $keys * @param string $type * @return array */function array_sort($arr, $keys, $type = 'desc') {    $keysvalue = $new_array = array();    foreach ($arr as $k => $v) {        $keysvalue[$k] = $v[$keys];    }    if ($type == 'asc') {        asort($keysvalue);    } else {        arsort($keysvalue);    }    reset($keysvalue);    foreach ($keysvalue as $k => $v) {        $new_array[$k] = $arr[$k];    }    return $new_array;}