I' am not sure if these will work in a filter or not.
get_class ($object); // Returns the name of the class of an object
get_called_class (); // The "Late Static Binding" class name
get_parent_class ($object); // Retrieves the parent class name for object or class
gettype ($var); // Get the type of a variable
is_subclass_of ($object, $class_name, $allow_string = TRUE); // Checks if the object has this class as one of its parents or implements it
get_class_methods ($class_name); // Gets the class methods' names
get_class_vars ($class_name); // Get the default properties of the class
get_object_vars ($object); // Gets the properties of the given object
What did you Try? What did you Get? What did you Expect?
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