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

Just try to clear the Symfony2 cache with the one (or all) the commands below :

php app/console cache:clear --env=prod --no-debug (on production mode)

or / and

php app/console cache:clear --env=dev --no-debug (on development mode)