Total image count for post page

I’m looking for a php script that will give me the total number of images on a post page. I’ve been able to get something to work for individual posts from here: https://www.mattvarone.com/wordpress/images-post-wordpress-regular-expressions/

That only works for individual posts though, but not for gettin the total image count for the entire post page. Can anyone help me modify that script or write up another script to do this? I know minimal php, so I need your help.

FYI – I need the total image count data on a horizontal scrolling theme to modify the wrapper div width so that it will hold the images, which of course vary from page to page.