Load session_start() only if session does not exist?

Question

is there a short code trick to check if a session has started and if not then load one? Currently I receive an error \"session already started...\" if I put in a session sta

Answer 1

Checking for existing session before starting new:

   // # if phpversion() is >= 5.4
  if(phpversion() >= 5.4) {

    // # check session_status() function for value 'PHP_SESSION_NONE'
    if(session_status() === PHP_SESSION_NONE) {
      session_start();
    }

  } else { // # maintain backwards compat. with PHP versions older than 5.4

      // # if $_SESSION object if NOT set, start a new session!
      if(!isset($_SESSION)) {
        session_start();
      }
  }