10

Array
(
    [0] => Array
        (
            [cover] => 1
            [id_image] => 28
            [legend] => 
            [position] => 1
        )

    [1] => Array
        (
            [cover] => 
            [id_image] => 29
            [legend] => 
            [position] => 2
        )

    [2] => Array
        (
            [cover] => 
            [id_image] => 30
            [legend] => 
            [position] => 3
        )

    [3] => Array
        (
            [cover] => 
            [id_image] => 31
            [legend] => 
            [position] => 4
        )

    [4] => Array
        (
            [cover] => 
            [id_image] => 32
            [legend] => 
            [position] => 5
        )

)
1

Array
(
    [0] => 10-29
    [1] => 10-30
)
1