Starting a Session
To work with a session, you need to explicitly start or resume that session unless you have changed your php.ini configuration file. By default, sessions do not start automatically. If you want to start a session this way, you will have to find the following line in your php.ini file and change the value from 0 to 1 (and restart the Web server):
session.auto_start = 0
By changing the value of session.auto_start to 1, you ensure that a session is initiated for every PHP document. If you don't change this setting, you need to call the session_start() function in each script.
After a session is started, you instantly have access to the user's session ID via the session_id() function. session_id() allows you to either set or ...
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