$filename = dirname(__FILE__) . ‘/oldfilename.jpg‘;$out_filename = ‘newfilename.jpg‘;if( ! file_exists($filename)){　　echo ‘Not Found‘ . $filename;　　exit;} else {　　// We‘ll be outputting a file　　header(‘Accept-Ranges: bytes‘);　　header(‘Accept-Length: ‘ . filesize($filename));　　// It will be called　　header(‘Content-Transfer-Encoding: binary‘);　　header(‘Content-type: application/octet-stream‘);　　header(‘Content-Disposition: attachment; filename=‘ . $out_filename);　　header(‘Content-Type: application/octet-stream; name=‘ . $out_filename);　　// The source is in filename
   if(is_file($filename) && is_readable($filename)){　　　　$file = fopen($filename, "r");　　　　echo fread($file, filesize($filename));　　　　fclose($file);
   }　　exit;}