Req #70643 [NEW]: Allow update of class alias

From: remyfox at hotmail dot com Operating system: irrelevant PHP version: Next Major Version Package: Class/Object related Bug Type: Feature/Change Request Bug description:Allow update of class alias Description: ------------ Since a class alias is assigned during run time, I suppose it would make sense to allow a class alias's update. Use case: E.g. in a system where multiple classes of different code versions (temporarily) exist to ensure backward compatibility when importing a number of updates. The versions of the class could all be put in separate temporarily generated uniquely named namespaces. During the execution of the updates, the class alias could be updated once it reaches an update which needs to use a newer version of a class that was also used by previous updates - albeit in an older state. Might be a good idea to include this in PHP 7. It seems like a small enhancement. Test script: --------------- class A {} class B {} class_alias("A", "X"); class_alias("B", "X"); Expected result: ---------------- Class alias X becomes B's alias. Actual result: -------------- Fatal error: Cannot redeclare class A -- Edit bug report at https://bugs.php.net/bug.php?id=70643&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=70643&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=70643&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=70643&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=70643&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=70643&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=70643&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=70643&r=needscript Try newer version: https://bugs.php.net/fix.php?id=70643&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=70643&r=support Expected behavior: https://bugs.php.net/fix.php?id=70643&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=70643&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=70643&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=70643&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70643&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=70643&r=dst IIS Stability: https://bugs.php.net/fix.php?id=70643&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=70643&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=70643&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=70643&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=70643&r=mysqlcfg