PHP 按二维数组的键值排序

<code><span>/**
     * 按二维数组的键值排序
     *<span> @param</span> unknown $array 二维数组
     *<span> @param</span> unknown $key   二维数组的键值
     *<span> @param</span> string $order  升序/降序
     *<span> @return</span> multitype:unknown  返回排序后的数组
     */</span><span>public</span><span>static</span><span><span>function</span><span>arr_sort_in_key</span><span>(<span>$array</span>, <span>$key</span>, <span>$order</span> = <span>"asc"</span>)</span>
    {</span><span>$arr_nums</span> = <span>$arr</span> = <span>array</span>();

        <span>foreach</span> (<span>$array</span><span>as</span><span>$k</span> => <span>$v</span>)
        {
            <span>$arr_nums</span>[<span>$k</span>] = <span>$v</span>[<span>$key</span>];
        }

        <span>if</span>(<span>$order</span>==<span>'asc'</span>)
        {
            asort(<span>$arr_nums</span>);
        }
        <span>else</span>
        {
            arsort(<span>$arr_nums</span>);
        }

        <span>foreach</span>(<span>$arr_nums</span><span>as</span><span>$k</span>=><span>$v</span>)
        {
            <span>$arr</span>[] = <span>$array</span>[<span>$k</span>];
        }

        <span>return</span><span>$arr</span>;

    }
</code>