PHP Sum up fields [duplicate]

I have following multidimensional array in PHP and want to clean it up but also sum up the fields.

Example:

    [UP-IXSZ-RP36] => Array
        (
            [stueck] => 1
            [anzahl] => 1
            [stock] => H-11-004
            [name] => Coffee Mate Original
        )

    [PW-KQZA-ROHD] => Array
        (
            [stueck] => 4
            [anzahl] => 1
            [stock] => H-14-017
            [name] => Trumpf AK
        )

    [K3-9SV1-MQQO] => Array
        (
            [stueck] => 5
            [anzahl] => 1
            [stock] => H-14-017
            [name] => Trumpf AK
        )

    [EN-6BZL-HJIG] => Array
        (
            [stueck] => 1
            [anzahl] => 1
            [stock] => B
            [name] => Turm Sahne
        )

    [3M-EEF4-JO4N] => Array
        (
            [stueck] => 1
            [anzahl] => 1
            [stock] => H-14-017
            [name] => Trumpf AK
        )

I want to filter by name and it should then show me following array.
Which SKU he uses is not important.

    [UP-IXSZ-RP36] => Array
        (
            [stueck] => 1
            [anzahl] => 1
            [stock] => H-11-004
            [name] => Coffee Mate Original
        )

    [PW-KQZA-ROHD] => Array
        (
            [stueck] => 10
            [anzahl] => 1
            [stock] => H-14-017
            [name] => Trumpf AK
        )

    [EN-6BZL-HJIG] => Array
        (
            [stueck] => 1
            [anzahl] => 1
            [stock] => B
            [name] => Turm Sahne
        )

Can someone help me with this issue?

Thanks.