Using session_start twice [duplicate]

Answer 1

PHP doesn't support multiple simultaneous sessions. Calling session_start() a second time in a request doesn't do anything unless the existing session was destroyed (via session_destroy()).

session_start() creates a session or resumes the current one based on a session identifier passed via a GET or POST request, or passed via a cookie.

http://php.net/session-start

Answer 2

You can use different session_start() if you check on each one if there was already a session created, in this way:

if (!isset($_SESSION)) {
    session_start();
}