How to insert html not from database and not using the iframe? - wordpress

Question

I wish basically to store my pages or product long descriptions in txt or html files in folders, not in database.
Is there any simple and easy way to do so, instead of iframe which does not work quite well and does not even display the content in the page code so it is not indexed by search engines as it should.
I've read about web components html imports but that seem to be so much complicated and does not really satisfy my needs.
I have not found any plugin to do so, maybe there is one.
I know I wish to make wordpress flat file cms, but maybe there is some new easy way to simply insert pages from anywhere but database might be via shortcode or just an url.

Answer 1

I put it in tags, should say more clear, it is about wordpress on host. As it stores all pages and data in database and I realized bigger database is slower it works. I use caching plugin but I also wish to speed up admin panel and dynamic uncacheble content. My idea is to slim down the database as much as possible and in my woocommerce store most of the data is long description. So the best way would be to inject the long description via shortcode that would take html content from anywhere else but database. I need html, not just some text to insert. This way I would cache these product pages anyway but the database would stay way slimmer and all the dynamic content would go way faster.

Answer 2

In PHP you can use the function file_get_contents, which will display the contents of a file (but not parse it as PHP, which is more secure for obvious reasons).
So you could try something like this if you wanted to account for a page not found message:
function example_get_content($file_url){
if(file_exists($file_url)){
return file_get_contents($file_url);
}
else{
return 'Sorry, this page could not be found'
}
}
And then in your template use
echo example_get_content('http://example.com/my_text_file.txt');