Session_id in php and regenerating by using session_regenrate

Session_id & session_regenerate_id in PHP

We can create a unique number for the session of the browser by generating a session id. Session id is generated by PHP at server end user can't change the generated session id. However it can be re-created. Here is the code.

echo session_id();

How session_id changes when we login

Each time we login by our userid and password we get a new session_id. A particular session_id may be associated with a userid but it keep on changing each time the same member login. If there are ten members logged in to your website at a moment then there will be ten different session id and each member will be associated with one session id.

Re generating the session_id

By using script we can regenerate another session_id. Here is the function .

session_regenerate_id();

Note that this is not same as session destroy or logout, here we are only changing the session_id value to a new one. All other session data remains unchanged.

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