Array
(
    [0] => foobarbaz
)
Array
(
    [0] => foobarbaz
    [1] => foo
    [2] => bar
    [3] => baz
)
1
Array
(
    [0] => 12
)
4
Array
(
    [0] => Array
        (
            [0] => 12
            [1] => 34
            [2] => 56
            [3] => 78
        )

)
6
Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
            [3] => 4
            [4] => 5
            [5] => 6
        )

)