Symfony 2 - Fatal error: Cannot redeclare class SessionHandlerInterface in C:\…\app\cache\dev\classes.php on line 532

Question

After reinstalling my wamp environment this error message is showing on screen after I open app_dev.php:

Fatal error: Cannot redeclare class SessionHa

Answer 1

Make sure you have defined namespace in your interface SessionHandlerInterface

EX:

namespace app\cache\dev;