#42330 [NEW]: Type hinting based upon interfaces not working

From: udo dot rader at bestsolution dot at Operating system: Linux PHP version: 5.2.3 PHP Bug Type: Scripting Engine problem Bug description: Type hinting based upon interfaces not working Description: ------------ When using type hinting with interfaces it fails to recognoize classes implementing the interface as "compatible". Reproduce code: --------------- abstract class Foo { abstract public function saySomething( IBar $what ); abstract public function saySomethingElse( IBar $what ); } class BarDAO extends Foo { function saySomething( IBar $what ) { echo $what->getMessage(); } function saySomethingElse( BarTransfer $what ) { echo $what->getMessage(); } } interface IBar { function getMessage(); } class BarTransfer implements IBar { function getMessage() { return "Hello from BarTransfer"; } } $barDAO = new BarDAO(); $barTransfer = new BarTransfer(); $barDAO->saySomething( $barTransfer ); $barDAO->saySomethingElse( $barTransfer ); Expected result: ---------------- The expected result should be that no compiler error occurs and that the script runs. Actual result: -------------- The PHP interpreter gives this error: Fatal error: Declaration of BarDAO::saySomethingElse() must be compatible with that of Foo::saySomethingElse() But, IMHO, BarTransfer can hardly be more "compatible" with IBar. -- Edit bug report at http://bugs.php.net/?id=42330&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=42330&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=42330&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=42330&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=42330&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=42330&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=42330&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=42330&r=needscript Try newer version: http://bugs.php.net/fix.php?id=42330&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=42330&r=support Expected behavior: http://bugs.php.net/fix.php?id=42330&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=42330&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=42330&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=42330&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42330&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=42330&r=dst IIS Stability: http://bugs.php.net/fix.php?id=42330&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=42330&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=42330&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=42330&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=42330&r=mysqlcfg