Which function is used to erase all session variables stored

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Which function is used to erase all session variables stored in the current session?

1. session_remove()
2. session_destroy()
3. session_unset()
4. session_change()
5. None of these

Correct Option: C

This will not completely remove the session from the storage mechanism. If you want to completely destroy the session, you need to use the function session_destroy().