Checks if the object is of this class or has this class as one of its parents interface_exists is_subclass_of Classes/Object Functions PHP Manual is_a (PHP 4 >= 4.2.0, PHP 5)is_a — Checks if the object is of this class or has this class as one of its parents Description bool is_a ( object $object , string $class_name ) Checks if the given object is of this class or has this class as one of its parents. Note: The is_a() function is deprecated as of PHP 5 in favor of the instanceof type operator. Parameters object The tested object class_name The class name Return Values Returns TRUE if the object is of this class or has this class as one of its parents, FALSE otherwise. Examples Example #1 is_a() example <?php// define a classclass WidgetFactory{ var $oink = 'moo';}// create a new object$WF = new WidgetFactory();if (is_a($WF, 'WidgetFactory')) { echo "yes, \$WF is still a WidgetFactory\n";}?> Example #2 Using the instanceof operator in PHP 5 <?phpif ($WF instanceof WidgetFactory) { echo 'Yes, $WF is a WidgetFactory';}?> See Also get_class() get_parent_class() is_subclass_of() interface_exists is_subclass_of Classes/Object Functions PHP Manual
