#49233 [NEW]: Type hinted parameter default value cannot be a class constant defined as null

From: bar105 at zepler dot net Operating system: Linux PHP version: 5.2.10 PHP Bug Type: Scripting Engine problem Bug description: Type hinted parameter default value cannot be a class constant defined as null Description: ------------ The parser does not permit the use of a class constant with the value NULL as a default value for a type-hinted function parameter. Using class constants instead of specific values such as "NULL" promotes a cleaner API, and more easily readable code. consider the following function, which might retrieve data from a database either for a specific date or for all dates: $foo->getInfo(Date::today()); // If given null, retrieve for all dates $foo->getInfo(null); // Using a class constant is much more readable $foo->getInfo(Foo::ALL_DATES); The parser should, imho, resolve the value of class constants before throwing an error stating the default value is not NULL and therefore not permitted. Please consider correcting this behaviour. Reproduce code: --------------- class Foo { const NO_VALUE = null; public static function bar(Foo $param = self::NO_VALUE) { if ($param == self::NO_VALUE) echo "Param was NO_VALUE" else echo "Param was a valid instance of Foo"; } } Expected result: ---------------- $myFoo = new Foo(); Foo::bar(my$Foo); // "Param was a valid instance of Foo" Foo::bar(); // "Param was NO_VALUE" Actual result: -------------- Fatal error: Default value for parameters with a class type hint can only be NULL -- Edit bug report at http://bugs.php.net/?id=49233&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=49233&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=49233&r=trysnapshot53 Try a snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=49233&r=trysnapshot60 Fixed in SVN: http://bugs.php.net/fix.php?id=49233&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=49233&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=49233&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=49233&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=49233&r=needscript Try newer version: http://bugs.php.net/fix.php?id=49233&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=49233&r=support Expected behavior: http://bugs.php.net/fix.php?id=49233&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=49233&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=49233&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=49233&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=49233&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=49233&r=dst IIS Stability: http://bugs.php.net/fix.php?id=49233&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=49233&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=49233&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=49233&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=49233&r=mysqlcfg