多表查询：
$data[‘upvideos‘] = $this->db->from(‘upload_video‘)->join(‘vcat‘, ‘vcat.catid = upload_video.catid‘)->order_by(‘createtime‘, ‘DESC‘)->get()->result_array();
跳转：
redirect(‘/uploadvideo/index‘, ‘refresh‘);
访问方式：
define(‘IS_POST‘, strtolower($_SERVER["REQUEST_METHOD"]) == ‘post‘); define(‘IS_GET‘, strtolower($_SERVER["REQUEST_METHOD"]) == ‘get‘);
原文：https://www.cnblogs.com/maoriaty/p/9885008.html