how to compress image size using intervention

after upload image size was still the same.

$file = Input::file('file');
                        $file_name = md5(uniqid() . time()) . '.' . $file->getClientOriginalExtension();
                        //                $directory = '\uploads\user_post_media'; //windows
                        $directory = '/storage/uploads/user_post_media'; //linux
                        $file->move(public_path().$directory, $file_name);
                        $imgsource = $directory.'/'.$file_name;
                        //                $image = $image->resize($width, null, true);

                        $source_img = public_path('storage/uploads/user_post_media/'.$file_name);
                        //                $destination_img = public_path('storage/uploads/user_post_media/'.$file_name);

                        $img = Image::make($source_img);
                        if(!$file->getClientOriginalExtension() == "gif"){
                            $img->save($source_img, 60);
                        }

thanks in advance