For every website you will do this:
I will provide you with rss link.
Usually rss link has little text inside.
You need to create php file that will parse rss links.
The file will open rss link. Will find what's new there. Then it will find the link to the news.
Will copy all existing data. Usually it is a photo, title and small description. But we will replace the small description with full description from the site.
The file that you will make will be specially adjusted for every site. It will find special tags in the html body to copy whole text from site.
At the end We need to generate custom rss link, xml file. That will have title, photos, videos and full text inside.
You will not create the php file from scratch.
I already have the parser for multiple sites.
You will have to fix few of them as the sites were modified.
and you will have to create it for new sites.