在php中只在关联数组中查找重复值

Question

This is my array output -

print_r($array_email);

    Array
(
    [1] => Array
        (
            [0] => [e-mail]
            [1] => [e-mail]
            [2] => [e-mail]
            [3] => [e-mail]
            [4] => [e-mail]
        )

    [2] => Array
        (
            [0] => [e-mail]
        )

    [3] => Array
        (
            [0] => [e-mail]
        )

    [4] => Array
        (
            [0] => [e-mail]
        )

)

Here i have tried - (but not working)

function get_duplicates( $array ) {
                return array_unique( array_diff_assoc( $array, array_unique( $array ) ) );
            }

print_r(get_duplicates($array_email));

I need output like that-

Array
    (
        [1] => Array
            (
                [1] => [e-mail]
                [2] => [e-mail]
                [4] => [e-mail]
            )

        [2] => Array
            (
                [0] => [e-mail]
            )
        [4] => Array
            (
                [0] => [e-mail]
            )

    )

Answer 1

If I understood your requirement correctly:

array_map(function($elem) {
    return array_unique($elem);
});