Bug #68041 [NEW]: Interfaces - Interfaced instance can access undefined methods

From: sosingus at gmail dot com Operating system: Linux PHP version: 5.4.32 Package: *General Issues Bug Type: Bug Bug description:Interfaces - Interfaced instance can access undefined methods Description: ------------ If we use interfaced instance to access a method not defined in interface itself, code will work! Expected is RuntimeException of some kind. Same applies for using parent class on instance of some subclass. If anyone cares I'll serach and create similar bug report for classes. This behavior can lead to serious problems in any serious OO code. Worst of all it cannot be predicted in any way. I think this is a system issue and probably exists since the OO beginning in php. Test script: --------------- <?php interface TestInterface { public function printMe(); } class TestClass implements TestInterface { public function printMe() { print "1\n"; } public function printMeToo() { print "2\n"; } } function testInterfaceShouldFail(TestInterface $instance) { $instance->printMe(); $instance->printMeToo(); } testInterfaceShouldFail(new TestClass()); Expected result: ---------------- raised/thrown RuntimeException Actual result: -------------- 1 2 -- Edit bug report at https://bugs.php.net/bug.php?id=68041&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=68041&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=68041&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=68041&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=68041&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=68041&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=68041&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=68041&r=needscript Try newer version: https://bugs.php.net/fix.php?id=68041&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=68041&r=support Expected behavior: https://bugs.php.net/fix.php?id=68041&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=68041&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=68041&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=68041&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=68041&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=68041&r=dst IIS Stability: https://bugs.php.net/fix.php?id=68041&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=68041&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=68041&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=68041&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=68041&r=mysqlcfg