#28464 [Com]: catch() does not catch exceptions by interfaces

ID: 28464 Comment by: php at koteroff dot ru Reported By: d at koteroff dot ru Status: Open Bug Type: Zend Engine 2 problem Operating System: * PHP Version: 5CVS-2004-05-21 (dev) New Comment: Still waiting. :-) Thanks for RC3. Previous Comments: ------------------------------------------------------------------------ [2004-05-21 02:03:15] d at koteroff dot ru Description: ------------ Seems PHP does not support exception catching by parent interface (not by parent classes). Why? This is a very powerful method to classify exceptions in programs. Documentation says that while comparing type in catch block 'instanceof' operator is used, but following test shows that it is wrong. I found corresponding code in the source, zend_execute.c:2866, and it searches for parent classes only. Why not use instanceof_function? Do you have any perspectives about this problem? Can I wrote in my book that PHP will support "interface catching" in the future? Reproduce code: --------------- <? interface E {} class A extends Exception implements E {} try { throw new A(); } catch (E $e) { echo $e; } ?> Expected result: ---------------- prints exception data Actual result: -------------- Fatal error: Uncaught exception ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=28464&edit=1