PHP如何将ARRAY_MAP与Reset()配合使用

我将PDOStatement::fetchAll与FETCH_GROUP和FETCH_ASSOC一起使用，以获取表的主键作为数组键.

$objects = $stmt_obj->fetchAll(PDO::FETCH_GROUP | PDO::FETCH_CLASS);

这将导致以下结果:

Array
(
    [56] => Array
        (
            [0] => stdClass Object
                (
                    ...
                )
        )

    [39] => Array
        (
            [0] => stdClass Object
                (
                    ...
                )
        )

    [38] => Array
        (
            [0] => stdClass Object
                (
                    ...
                )
        )

    [71] => Array
        (
            [0] => stdClass Object
                (
                    ...
                )
        )
)

剥离我使用的无用编号数组的结果

$objects = array_Map('reset', $objects);

如下所述: https://www.php.net/manual/en/pdostatement.fetchall.php#88699个 或者在这里: https://gist.github.com/betweenbrain/9239337

在PHP 8.2中，我得到一个警告:

PHP Warning:  reset(): Argument #1 ($array) must be passed by reference, value given

我还可以使用其他什么方法来处理无用的编号数组，并得到以下结果:

Array
(
    [56] => stdClass Object
        (
            ...
        )

    [39] => stdClass Object
        (
            ...

    [38] => stdClass Object
        (
            ...
        )

    [71] => stdClass Object
        (
            ...
        )
)