note 76582 added to language.operators.type

Response to vinyanov at poczta dot onet dot pl: You mentionned "the instanceof operator will not accept a string as its first operand". However, this behavior is absolutely right and therefore, you're misleading the meaning of an instance. <?php 'ClassA' instanceof 'ClassB'; ?> means "the class named ClassA is an instance of the class named ClassB". This is a nonsense sentence because when you instanciate a class, you ALWAYS obtain an object. Consequently, you only can ask if an object is an instance of a class. I believe asking if "a ClassA belongs to a ClassB" (or "a ClassA is a class of (type) ClassB") or even "a ClassA is (also) a ClassB" is more appropriate. But the first is not implemented and the second only works with objects, just like the instanceof operator. Plus, I just have tested your code and it does absolutely NOT do the same as instanceof (extended to classes)! I can't advise anyone to reuse it. The use of <?php is_instance_of ($instanceOfA, 'ClassB'); ?> raises a warning "include_once(Object id #1.php) …" when using __autoload (trying to look for $instanceOfA as if it was a class name). Finally, here is a fast (to me) sample function code to verify if an object or class: <?php function kind_of (&$object_or_class, $class) { return is_object ($object_or_class) ? $object_or_class instanceof $class : (is_subclass_of ($object_or_class $class) || strtolower ($object_or_class) == strtolower ($class)); } ?> ---- Server IP: 195.221.21.36 Probable Submitter: 82.241.244.168 ---- Manual Page -- http://www.php.net/manual/en/language.operators.type.php Edit -- https://master.php.net/note/edit/76582 Del: integrated -- https://master.php.net/note/delete/76582/integrated Del: useless -- https://master.php.net/note/delete/76582/useless Del: bad code -- https://master.php.net/note/delete/76582/bad+code Del: spam -- https://master.php.net/note/delete/76582/spam Del: non-english -- https://master.php.net/note/delete/76582/non-english Del: in docs -- https://master.php.net/note/delete/76582/in+docs Del: other reasons-- https://master.php.net/note/delete/76582 Reject -- https://master.php.net/note/reject/76582 Search -- https://master.php.net/manage/user-notes.php