Am developing my own Cart Using PHP and MySQL its a good learning curve However; I cant help wondering the commend method in retrieving information from user, So far what i have found online is using the Session_id().

Is using the Session_id() the commend way? The only way ?

Is it sufficient to use the Session_id() as the only way to track user orders?

Is it secure to use it ? or there is some considerations i need to keep in mind?

Please enlighten me regarding these questions.

Thank you