What is the Difference Between session_unset() and session_destroy() in PHP?
Category: Php
Learn the difference between session_unset() and session_destroy() in PHP. Understand how each function affects session data, IDs, and when to use them for secure session handling.
In PHP, session_unset() clears all session variables but keeps the session active, while session_destroy() completely terminates the session and deletes its data from the server.
✅ Key Differences:
| Aspect | session_unset() | session_destroy() |
|---|---|---|
| Effect on Data | Clears session variables | Deletes session and its data |
| Session ID | Remains valid | Becomes invalid |
| Session File | Not deleted | Deleted from server |
| Persistence | Session remains usable | Session ends completely |
| Use Case | Clear data, keep session alive (e.g., soft logout) | Fully log out user, remove all session traces |
