is_subclass_of
(PHP 4 , PHP 5)
is_subclass_of --
Returns
TRUE if the object has this class as one of its parents
Description
bool
is_subclass_of ( object object, string class_name)
This function returns TRUE if the object
object, belongs to a class which is a
subclass of class_name, FALSE otherwise.
See also get_class(),
get_parent_class() and
is_a().