原生上传图片方法

  //上传封面图方法
            case 'uploadthumb';
//                var_dump($_FILES);
//                var_dump($_POST);exit;
                $suffix = strrchr($_FILES['file']['name'],".");
                if ((($_FILES["file"]["type"] == "image/gif")
                        || ($_FILES["file"]["type"] == "image/jpeg")
                        || ($_FILES["file"]["type"] == "image/jpg")
                        || ($_FILES["file"]["type"] == "image/png")
                        || ($_FILES["file"]["type"] == "image/gif")
                    || ($_FILES["file"]["type"] == "image/pjpeg"))
                    && ($_FILES["file"]["size"] < 9000000))
                {
                    if ($_FILES["file"]["error"] > 0)
                    {
                        echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
                    }
                    else
                    {
                        if (file_exists("upload/" . $_FILES["file"]["name"]))
                        {
                            echo $_FILES["file"]["name"] . " already exists. ";
                        }
                        else
                        {

                            $finalimg = time();
                            move_uploaded_file($_FILES["file"]["tmp_name"], "admin/img/" . $finalimg.$suffix);
//                            echo "Stored in: " . "video4/admin/img/" . $finalimg.$suffix;
                            $thumburl =  "admin/img/" . $finalimg.$suffix;
//                            var_dump($_POST);
                            $linkurl = $_POST['linkurl'];
                            $videourl = $_POST['videourl'];
                            $title = $_POST['title'];
                            $discription = $_POST['discription'];
                            $pid = intval($_POST['category']);
                            echo $pid;
                            $addtime = time();
                            $res = $db -> query( " INSERT INTO `ttf_videos` (`videourl`,`thumburl`,`title`,`discription`,`addtime`,`pid`) VALUES  ('$videourl','$thumburl','$title','$discription','$addtime','$pid') "  );
//                            var_dump($res);exit;
                            if($res){
                                echo "<script>alert('添加成功!');  self.location=document.referrer;</script>";

                            }else{
                                echo "<script>alert('添加出错!');  self.location=document.referrer;</script>";
                            }
                        }
                    }
                }
                else
                {
                    echo "Invalid file";
                }
                break;