PHP组织相同值的行

Question

我正从sql server检索数据，然后以有条理的方式呈现它们 我有一个这样的对象数组：

Array
(
[0] => stdClass Object
    (
        [post_id] => 1
        [controller] => Cato
        [controller_method] => edit
        [http_method] => post
    )

[1] => stdClass Object
    (
        [post_id] => 1
        [controller] => Cato
        [controller_method] => edit
        [http_method] => get
    )

[2] => stdClass Object
    (
        [post_id] => 1
        [controller] => Cato
        [controller_method] => create
        [http_method] => post
    )

[3] => stdClass Object
    (
        [post_id] => 1
        [controller] => Cato
        [controller_method] => create
        [http_method] => get
    )
)

不知怎的，我需要转换成这样的东西：

Array(
    [0] => Array(
        [controller] => controller1,
        [controller_methods] => Array (
            [0] => Array (
                [controller_method] => create,
                [http_methods] => Array (
                    [0] => get,
                    [1] => post
                )
            ),
            [0] => Array (
                [controller_method] => edit,
                [http_methods] => Array (
                    [0] => get,
                    [1] => post
                )
            )
        )
    ),
    [0] => Array(
        [controller] => controller2,
        [controller_methods] => Array (
            [0] => Array (
                [controller_method] => create,
                [http_methods] => Array (
                    [0] => get,
                    [1] => post
                )
            ),
            [0] => Array (
                [controller_method] => edit,
                [http_methods] => Array (
                    [0] => get,
                    [1] => post
                )
            )
        )
    )
)

当使用带有sql db的php时，我总是遇到这样的事情 有没有方便的方法呢？