I am confused about sessions . I have a form that adds record. In this form first step is taking costumer information and i put the customer id in a $_SESSION["customer _id"] because when I submit customer information,related the first form,the second form appears and when i submit it too i get the value $_SESSION["customer_id"] and add it database.
My question is when the times multiple users use this system, is there a possible to confuse this session value? I mean when two user is active in this system and they are both add new record there will be two $_SESSION["costumer_id"] value . Does it make the system confusing?
No, There is a separate session created for each user, so don't worry about the session. please refer below link its very helpful to understand the working of session.
Session support in PHP consists of a way to preserve certain data across subsequent accesses.
Session will be unique for each different connected users. Two different user's session will never mixed up. The stored data in session for particular user will not appear or accessible to any other user.