uchome //默认加入群组

//默认加入群组
if($_SGLOBAL['supe_uid']){
             $sql = "SELECT * FROM ".tname('mtag')." WHERE tagid=18"; //这个ID需要你修改成自己的默认群组的ID
         $query = $_SGLOBAL['db']->query($sql); 
         $rs=($_SGLOBAL['db']->fetch_array($query)); 
          if($rs) {           //如果有该群组
            $tagid = $rs['tagid']; //先查找当前用户是否已经加入了该群组
                 $sql = "SELECT * FROM `" .tname('tagspace'). "` WHERE tagid=$tagid AND uid=".$_SGLOBAL[supe_uid];
                  $query = $_SGLOBAL['db']->query($sql);
                   $found_user_tagspace=($_SGLOBAL['db']->fetch_array($query));
                            if(!$found_user_tagspace) { //如果没有加入,
                          $setarr=array('membernum'=>$rs['membernum']+1);//更新群组人数
                           updatetable('mtag',$setarr,array('tagid'=>$tagid));
                            unset($setarr); 
                         $setarr = array( 'tagid' => $tagid, 'uid' => $_SGLOBAL[supe_uid], 'username' => $_SGLOBAL[supe_username], 'grade' => 0 );
                         $tagspaceid=inserttable('tagspace',$setarr,1); //加入群组
                         }
                                          
        } 
}