symfony - ErrorException: Warning: ini_set(): A session is active. You cannot change the session module's ini settings at this time in /../../

Question

I am trying to create my own authentication provider like in http://symfony.com/doc/current/cookbook/security/custom_authentication_provider.html.

But, it keeps saying:

ErrorException: Warning: ini_set(): A session is active. You cannot change the session module's ini settings at this time in /../../vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/NativeFileSessionHandler.php line 56

Answer 1

Symfony2 sessions will not work properly with "session auto start" enabled. So make sure that's disabled.

Make sure your php configuration php.ini has this configured: session.auto_start = 0.

Or you can add php_flag session.auto_start 0 to your .htaccess file if you can not edit the php.ini file.