Why is session data empty in Symfony2 and how to access it?

Question

A third-party PHP application stores data in the user\'s session (using a cookie for PHPSESSID). In this app, the $_SESSION variable contains all this data.

Answer 1

I finally solved the problem. Symfony stores its session data in its own directory (app/cache/[environment]/sessions). So the solution is to set the default session path in config.yml:

framework:
    session:
        save_path: ~

This will set the default path back (for example /var/lib/php5 on Linux) and the legacy app session data is made available to the Symfony app.