URI = Uniform Resource Identifier

Actually, it’s both ways. Universal Resource Identifier is the less commonly used but still accepted. See the Acronym Finder Search.

so what is the difference between URI and URL?

In one word: semantics.

I am not fully aware of this: anyway here is the subtle difference:
URL: https://www.premrara.com/index.php
URN: https://www.premrara.com/index.php#footer
URI: https://www.premrara.com/index.php#footer

LOL ??

I’m for russians ??

https://hsc.usf.edu/~kfly/work/uri_vs_url.html

URIs, URLs, and URNs: Clarifications and Recommendations
https://www.w3.org/TR/uri-clarification/
poor grandma

Allowed tags: a em strong code ul ol li blockquote.
Put code in between backticks.

I can’t find the button to post a new topic, so I’ll just post it here. When entering the URI for my blog in what I recall was the Options menu, WordPress doesn’t want to save my link with the mandatory ‘/’ at the end (i.e. “https://…/blog/” is saved as “https://…/blog”)—without which, doesn’t load my webpage properly. (I’m running my blog from a Mac Apache server) As a workaround, I tried entering “https://…/blog/index.php” but this just busted all the formatting for the blog, and it also broke my access to the Option menu in administration mode so I can’t change it back. I’m at a loss. ?? Can you help?

1. At the bottom of the main forum page there are the sections listed. Click one, if possible the right one, and again at the bottom you’ll have the possibility to start a new topic.
2. When you scrwed up the 2 URIs, the only way to fix it is via phpMyadmin:
https://www.tamba2.org.uk/wordpress/site-url/