:sig
String session_start(String session_name = "uce-session")

:params
session_name : optional name of the session cookie, defaults to "uce-session"
return value : the current session ID

:desc
Starts session or connects to existing session. This function sets a cookie with the name contained in 'session_name' if it does not exist and fills that cookie with a new unique session ID. It then loads the session data for that session ID. Afterwards, the following fields are populated in the 'context' variable:

context.session_id : the current session ID

context.session_name : the current session cookie name

context.session : the current session data. The session data is automatically saved after a request completes.

:see
>session

:related
**PHP:** `session_start()`
**JavaScript / Node.js:** Express `express-session`, `cookie-session`, or similar request-bound session middleware