(PHP 4 >= 4.2.0, PHP 5)
is_a -- Returns TRUE if the object is of this class or has this class as one of its parentsThis function returns TRUE if the object is of this class or has this class as one of its parents, FALSE otherwise.
The is_a() function is deprecated as of PHP 5 in favor of the instanceof type operator. In the above example we could use the following in PHP 5:
See also get_class(), get_parent_class(), and is_subclass_of().