Type hinting - specify an array of objects

Question

Is there a way to specify the argument type as an array? Assume if I have a class named foo:

class Foo {}

And I have a function that accepts that class type as an argument:

function getFoo(Foo $f) {}

I am getting an error when I pass in the array:

Catchable fatal error: Argument 1 passed to getFoo() must be an instance of Foo, array given

Is there a way to solve this?