how to check if values exist inside a multidimensional array

i have an array like this:

我有一个像这样的数组:

Array
(
[206] => Array
    (
        [1] => Array
            (
                [formatid] => 1
                [format] => CD
                [formatseourl] => cd
            )

    )

[556] => Array
    (
        [] => Array
            (
                [formatid] => 
                [format] => 
                [formatseourl] => 
            )

    )

[413] => Array
    (
        [3] => Array
            (
                [formatid] => 3
                [format] => CASETE
                [formatseourl] => casete
            )

    )
)
Arra