Every Image URL Filter For WordPress, Front & Back End
I had a project where every single media library image URL needed to be filtered, backend and front end. As far as I’ve found these were the filters for every area:
myplugin_filter_html_image_urls() function peals out images with regex from areas where it’s not just the URL being sent. This function may require verification of the current domain incase bad practices of using external images is being done.