original_string: public static function confirm_link_login($userid, $username, $issuerid, $token) {
          if (empty($token) || empty($userid) || empty($issuerid) || empty($username)) {
              return false;
          }
          $params = [
              'userid' => $userid,
              'username' => $username,
              'issuerid' => $issuerid,
              'confirmtoken' => $token,
          ];
  
          $login = linked_login::get_record($params);
          if (empty($login)) {
              return false;
          }
          $expires = $login->get('confirmtokenexpires');
          if (time() > $expires) {
              $login->delete();
              return;
          }
          $login->set('confirmtokenexpires', 0);
          $login->set('confirmtoken', '');
          $login->update();
          return true;
      }
code: public static function confirm_link_login($userid, $username, $issuerid, $token) {
          if (empty($token) || empty($userid) || empty($issuerid) || empty($username)) {
              return false;
          }
          $params = [
              'userid' => $userid,
              'username' => $username,
              'issuerid' => $issuerid,
              'confirmtoken' => $token,
          ];
  
          $login = linked_login::get_record($params);
          if (empty($login)) {
              return false;
          }
          $expires = $login->get('confirmtokenexpires');
          if (time() > $expires) {
              $login->delete();
              return;
          }
          $login->set('confirmtokenexpires', 0);
          $login->set('confirmtoken', '');
          $login->update();
          return true;
      }
code_tokens: public static function confirm_link_login ( $ userid , $ username , $ issuerid , $ token ) { if ( empty ( $ token ) || empty ( $ userid ) || empty ( $ issuerid ) || empty ( $ username ) ) { return false ; } $ params = [ 'userid' => $ userid , 'username' => $ username , 'issuerid' => $ issuerid , 'confirmtoken' => $ token , ] ; $ login = linked_login :: get_record ( $ params ) ; if ( empty ( $ login ) ) { return false ; } $ expires = $ login -> get ( 'confirmtokenexpires' ) ; if ( time ( ) > $ expires ) { $ login -> delete ( ) ; return ; } $ login -> set ( 'confirmtokenexpires' , 0 ) ; $ login -> set ( 'confirmtoken' , '' ) ; $ login -> update ( ) ; return true ; }
docstring: Look for a waiting confirmation token, and if we find a match - confirm it.
  
  @param int $userid
  @param string $username
  @param int $issuerid
  @param string $token
  @return boolean True if we linked.
docstring_tokens: Look for a waiting confirmation token and if we find a match - confirm it .