#46286 [NEW]: Extending class with static getInstance()-type method

From: bob at db dot org Operating system: Any PHP version: 5.3.0alpha2 PHP Bug Type: Feature/Change Request Bug description: Extending class with static getInstance()-type method Description: ------------ A getInstance() method is a fairly common design-pattern, yet it's impossible to create such a function in a base-class and have it function as expected when access via the inheriting class. I understand that this is documented behavior, and that it's probably impossible to achieve this using existing syntax/functions. What I'm hoping for is a new function; something like get_statis_class(void) that will return the name of the class used to *access* the static method, not the name of the class in which it was defined. I can provide more elaboration on why this is a nice feature if needed. The attached example is kept short to illustrate the problem as clearly as possible. Reproduce code: --------------- <?php class base { public static function getInstance() { $class = __CLASS__; return new $class(); } } class heir extends base { } $instance = heir::getInstance(); die(get_class($instance)); ?> Expected result: ---------------- heir Actual result: -------------- base -- Edit bug report at http://bugs.php.net/?id=46286&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=46286&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=46286&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=46286&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=46286&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=46286&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=46286&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=46286&r=needscript Try newer version: http://bugs.php.net/fix.php?id=46286&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=46286&r=support Expected behavior: http://bugs.php.net/fix.php?id=46286&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=46286&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=46286&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=46286&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46286&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=46286&r=dst IIS Stability: http://bugs.php.net/fix.php?id=46286&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=46286&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=46286&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=46286&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=46286&r=mysqlcfg