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

(PHP 5 >= 5.4.0, PHP 7) Destroy a session

(PHP 4 >= 4.2.0, PHP 5 <= 5.1.2) Set msession variables from an array

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

(PHP 5 >= 5.6.0, PHP 7) Discard session array changes and finish session

(PHP 5 >= 5.4.0, PHP 7) Cleanup old sessions

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Return current cache expire

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

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

(PHP 4, PHP 5, PHP 7) Get and/or set the current session save path