点击图片自动上载，请教代码怎么写

function get_extension($file){                        return substr(strrchr($file, '.'), 1);               }      function get_name($path){                        return substr(strrchr($path, '/'), 1);               }         function getImage($url,$fileName="") {                $fbufsize = 8096;                $ext = get_extension($url);                                $fileName = get_name($url);                                $type = array(                'gif' => 'image/gif',                'jpeg' => 'image/jpeg',                'jpg' => 'image/jpeg',                'jpe' => 'image/jpeg',                'png' => 'image/png',                 );                                $imgType = isset($type[$ext])?$type[$ext]:die("类型不符");                                header('Content-Description: File Transfer');                header('Expires: 0');                header('Cache-Control: must-revalidate, post-check=0, pre-check=0');                header('Pragma: public');                header("Content-type: ".$imgType);                header("Content-Transfer-Encoding: binary");                header('Content-Disposition: attachment; filename="'.$fileName.'"');                            header("Content-Length:" . getimagesize($url)."\n\n" );                                   $fp = fopen($url,"r");                while(!feof($fp)) {                    print(fread($fp,$fbufsize));                    flush();                    ob_flush();                }                fclose($fp);                exit;        }             getImage("http://www.lpfrx.com/wp-content/themes/ProSense/images/rss-feed-icon.jpg");