The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,'

Question

How to solve :

Warning: session_start() [function.session-start]: The session id is too long or contains illegal characters, valid characters are a-z, A-

Answer 1

I edited Andron's previous solution! (fix returned value) and added the evaluation output of my_session_start(). Previous solution solve problem with error message, but I need have to session started.

/**
 * @return boolean return TRUE if a session was successfully started
 */        
function my_session_start()
{
      $sn = session_name();
      if (isset($_COOKIE[$sn])) {
          $sessid = $_COOKIE[$sn];
      } else if (isset($_GET[$sn])) {
          $sessid = $_GET[$sn];
      } else {
          return session_start();
      }

     if (!preg_match('/^[a-zA-Z0-9,\-]{22,40}$/', $sessid)) {
          return false;
      }
      return session_start();
}

if ( !my_session_start() ) {
    session_id( uniqid() );
    session_start();
    session_regenerate_id();
}