(PHP 5 >= 5.4.0, PHP 7) Read session data

(PHP >=5.4.0) Returns the current session status

(PHP 5 >= 5.4.0, PHP 7) Initialize session

(PHP 4 >= 4.2.0, PHP 5 <= 5.1.2) List sessions with variable

(PHP 4 >= 4.2.0, PHP 5 <= 5.1.2) Unlock a session

(PHP 4 >= 4.2.0, PHP 5 <= 5.1.2) Set/get session timeout

(PHP 4 >= 4.2.0, PHP 5 <= 5.1.2) Lock a session

(PHP 5 >= 5.4.0, PHP 7) Close the session

(PHP 4 >= 4.2.0, PHP 5 <= 5.1.2) Get session count

(PHP 4 >= 4.2.0, PHP 5 <= 5.1.2) Set data session unstructured data