How or when garbage collection with session will take place in case of session managing with database in php? I done session management with database. But it is not deleting the user details who completed the time of expiration.
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
How or when garbage collection with session will take place in case of session managing with database in php? I done session management with database. But it is not deleting the user details who completed the time of expiration.
People always seem to get confused by this.
Garbage collection is triggered based on a throw of the dice whenever there is a call to session_start(). So if all your customers suddenly stopped accessing your webserver at the same time, garbage collection would never kick in and the session data would persist indefinitely.
However it is the responsibility of the session handler to only return session data if the session was previously accessed before the TTL had expired. Therefore every time the session is saved, the handler must update the timestamp on the session data file/record even if the data has not changed.
If session data is being returned by the handler after the TTL has expired then there is a bug in the session handler.
However you merely state that the data exists after the session has expired – this is perfectly normal.
OTOH if you simply want to reduce the overhead of storing a lot of expired sessions then you can force garbage collection to occur more frequently by increasing the gc_probability or decreasing the gc_divisor. But then you’re pushing more processing effort into the request handler.
C.