How to save the output of PHP image processing -

i'm not sure whether or not function intend do, need create thumbnail of image in folder.

$filename = '../images/' . $new_name;  header('content-type: image/jpeg');  list($width, $height) = getimagesize($filename);  $new_width = $width / $height;  $new_height = 250 / $new_width;  $new_height = round($new_height);  $image_p = imagecreatetruecolor(250, $new_height); $image_s = imagecreatefromjpeg($filename); imagecopyresampled($image_p, $image_s, 0, 0, 0, 0, 250, $new_height, $width, $height);  imagejpeg($image_p, null, 100); 

so need save final result folder, not overwrite original image. found function on http://php.net/, have no idea how save image.

imagejpeg($image_p, "path/to/dir/image.jpg", 100); 

and all.