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

From: d at koteroff dot ru Operating system: * PHP version: 5CVS-2004-05-21 (dev) PHP Bug Type: Zend Engine 2 problem Bug description: catch() does not catch exceptions by interfaces 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 bug report at http://bugs.php.net/?id=28464&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=28464&r=trysnapshot4 Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=28464&r=trysnapshot5 Fixed in CVS: http://bugs.php.net/fix.php?id=28464&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=28464&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=28464&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=28464&r=needscript Try newer version: http://bugs.php.net/fix.php?id=28464&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=28464&r=support Expected behavior: http://bugs.php.net/fix.php?id=28464&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=28464&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=28464&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=28464&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=28464&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=28464&r=dst IIS Stability: http://bugs.php.net/fix.php?id=28464&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=28464&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=28464&r=float