Bug #71970 [NEW]: Dynamic class names don't work with aliases

From: marcus at synchromedia dot co dot uk Operating system: PHP version: 5.6.20 Package: Class/Object related Bug Type: Bug Bug description:Dynamic class names don't work with aliases Description: ------------ In simple cases, creating a class instance where the name of the class is in a string, it generally works as per the docs: $a = 'myclass'; $b = new $a; //works But if the class name is from an aliased import, it fails. use Some\Project\myclass; $a = 'myclass'; $b = new $a; //fails Adding a __NAMESPACE__ prefix (as per bug #53904) doesn't work because it uses the current namespace, not the aliased one. It's impossible to work around this with reflection because the class may not yet be loaded, so there seems to be no way of getting the namespace that an aliased name belongs to. I think this is a bug (or feature) in the order of resolving the class name before creating it. PHP resolves the class name but does not apply alias mappings to it before using it. Test script: --------------- <?php namespace my\project; require 'vendor/autoload.php'; use League\OAuth2\Client\Provider\Google; use Stevenmaguire\OAuth2\Client\Provider\Microsoft; $provider = 'Google'; $nprovider = __NAMESPACE__ . $provider; $a = new Google; //Succeeds $a = new $provider; //Fails $a = new $nprovider; //Fails - wrong namespace -- Edit bug report at https://bugs.php.net/bug.php?id=71970&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=71970&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=71970&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=71970&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=71970&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=71970&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=71970&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=71970&r=needscript Try newer version: https://bugs.php.net/fix.php?id=71970&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=71970&r=support Expected behavior: https://bugs.php.net/fix.php?id=71970&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=71970&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=71970&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=71970&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=71970&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=71970&r=dst IIS Stability: https://bugs.php.net/fix.php?id=71970&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=71970&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=71970&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=71970&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=71970&r=mysqlcfg