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Yes. PHP sessions rely on a cookie containing a session key. Your session data are stored only on your server, but a unique ID is assigned to each session and that ID gets saved in a cookie.
The main difference between a session and a cookie is that session data is stored on the server, whereas cookies store data in the visitor’s browser. Sessions are more secure than cookies as it is stored in server.
Which is better session or cookie in PHP?
The main difference is security, because if you use cookies directly clients can see and/or edit them themselves, but for session the data is stored on the server side so client cannot access directly. So if the data only lasts for that session, I prefer using session.
When to use cookies or sessions in PHP?
If you want the id to be remembered for long time, then you need to use cookies; otherwise if you just want the website to recognize the user for this visit only then sessions is the way to go. Sessions are stored in a file your php server will generate.
Where are the sessions stored in PHP server?
Sessions are stored in a file your php server will generate. To remember which file is for which user, php will also set a cookie on the user’s browser that holds this session file id so in their next visit php will read this file and reload the session.
Cookies store it directly on the client. Sessions use a cookie as a key of sorts, to associate with the data that is stored on the server side. It is preferred to use sessions because the actual values are hidden from the client, and you control when the data expires and becomes invalid.
Where is the UID stored in a cookie?
Session data is stored on the server side, but a UID is stored on client side in a cookie. It allows the server to match a given user with the right session data. UID is protected and hard to hack, but not invulnarable.