What is the difference between unsetting a session variable and destroying a session in PHP?

Unsetting a session variable in PHP removes the specific variable from the session data, but the session itself remains active. Destroying a session, on the other hand, completely removes all session data and ends the session entirely. If you only need to remove a specific variable from the session, use unset(). If you want to completely end the session, use session_destroy(). 

// Unset a specific session variable
unset($_SESSION['variable_name']);

// Destroy the entire session
session_destroy();

Keywords

session variable destroying session unset session_start session_destroy

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