为什么Symfony2中的会话数据为空以及如何访问它？

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.

In my Symfony2 application, the same $_SESSION only contains some Symfony data (_sf2_attributes, _security_secured_area, _sf2_flashes, etc.) and I don't see any other data from the other app.

I did a var_dump of the $_SESSION variable in a controller to check this. Using the Symfony Session object shows the same data. The 2 apps use the same domain for storing the PHPSESSID cookie.

How can I get all data of the session in my Symfony app? I would like the session to be shared between the 2 applications.

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.