ci 学习笔记

1:$this->session->sess_destroy();/清空session
2：session_unset(); //重置所有session，即清空原有值:
3.$this->input->is_ajax_request()//是否是ajax请求
4.$this->input->method(TRUE); // Outputs: POST返回表单提交方式5.$this->input->method(FALSE); // Outputs: post
6.$route['default_controller'] = 'welcome';//设置ci默认控制器application->config->routes.php7. $cur_method =  $this->router->fetch_method();获得当前请求的方法名8. $this->db->where_in("ROOMID",$array);
9.// num rows example//获取记录的行数$this->db->select('*');$this->db->where('whatever');$query = $this->db->get('table');$num = $query->num_rows();// here you can do something with $query// count all example$this->db->where('whatever');$num = $this->db->count_all_results('table');// here you only have $num, no $query