Req #70671 [NEW]: Fatal Error: Cannot use class because the name is already in use in

From: david at grudl dot com Operating system: PHP version: Irrelevant Package: Class/Object related Bug Type: Feature/Change Request Bug description:Fatal Error: Cannot use class because the name is already in use in Description: ------------ PHP produces unnecessary "Fatal error: Cannot use Something\Foo as Foo because the name is already in use in bar.php". There is no reason to throw such error. The error is insidious because it dependents on the order in which the files are loaded, which is (with autoloading) unpredictable. In reverse order (see demo-ok.php) is everything ok. Moreover, in PHP 7 it is not possible to catch this error via try ... catch or even via set_exception_handler(). Test script: --------------- foo.php: <?php namespace A; class Foo {} ?> ------------ bar.php: <?php namespace A; use Something\Foo; ?> ------------- demo-fatalerror.php <?php include 'foo.php'; include 'bar.php'; ?> ------------- demo-ok.php <?php include 'bar.php'; include 'foo.php'; ?> -- Edit bug report at https://bugs.php.net/bug.php?id=70671&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=70671&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=70671&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=70671&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=70671&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=70671&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=70671&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=70671&r=needscript Try newer version: https://bugs.php.net/fix.php?id=70671&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=70671&r=support Expected behavior: https://bugs.php.net/fix.php?id=70671&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=70671&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=70671&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=70671&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70671&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=70671&r=dst IIS Stability: https://bugs.php.net/fix.php?id=70671&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=70671&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=70671&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=70671&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=70671&r=mysqlcfg