Symfony2 configure DB storage sessions - symfony

Question

UPDATE: problem solved, see the comments (many issues, the versions differences was but one of them).
I'm trying to configure sessions in Symfony2 in config.yml file. I have the following configuration:
session:
default_locale: %locale%
lifetime: 7200
auto_start: true
storage_id: session.storage.pdo
parameters:
pdo.db_options:
db_table: session
db_id_col: session_id
db_data_col: session_value
db_time_col: session_time
services:
pdo:
class: PDO
arguments:
- "mysql:dbname=%database_name%"
- %database_user%
- %database_password%
session.storage.pdo:
class: Symfony\Component\HttpFoundation\SessionStorage\PdoSessionStorage
arguments: [#pdo, %session.storage.options%, %pdo.db_options%]
It's based on Symfony2's cookbook http://symfony.com/doc/2.0/cookbook/configuration/pdo_session_storage.html
I've created exactly the same table as in the given link.
However, it doesn't work. I get some "blank" error (no error message, but "PDO Exception" and "Error Exception"). I admit I have no much knowledge on configuring the Symfony2 or any info (that's why I'm using cookbook). I lost a lot of time and see no much documentation about it in the internet, not mentioning the fact that internet is quite silent about this case (having session storaged to DB table in Symfony2).
My NetBeans is "shouting" sth about the last line:
arguments: [#pdo, %session.storage.options%, %pdo.db_options%]
"ScannerException while scanning for the next token we had this found character #(64) that cannot start any token".
UPDATE:
Hmm now I'm not sure if it's about the configuration. I can see that Symfony2's cookbook (use... ) example doesn't match actually the file structure in the Symfony2's bundle. In a word, there is no such file-path, but after putting the real one it still doesn't work.

Answer 1

I had the same problem as you with Symfony 2.5. Turns out my solution was to disable session.auto_start in php.ini. The PdoSessionStorage will not take over if the session is being started before PDO has the opportunity to take control of it. I had overlooked this at first because I was modifying the wrong one (I had two copies of php.ini). To check if this is the problem on yours, run this command:
echo ini_get('session.auto_start');
If that returns a '1' or a 'true', then be sure to set this in your php.ini:
session.auto_start = 0
So for reference, here is my setup with Symfony 2.5 to make this work:
config.yml
framework:
session:
handler_id: session.handler.pdo
parameters:
pdo.db_options:
db_table: session
db_id_col: session_id
db_data_col: session_value
db_time_col: session_time
services:
session.handler.pdo:
class: Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler
arguments: ["#pdo", "%pdo.db_options%"]
pdo:
class: PDO
arguments:
dsn: "mysql:host=%database_host%;port=%database_port%;dbname=%database_name%"
user: "%database_user%"
password: "%database_password%"
calls:
- [setAttribute, [3, 2]] # \PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION