That said, the line probably doesn’t do anything. Any time your specify RewriteEngine On, it wipes all the previous rewrite rules. So there are a few rewrite blocks which are never used.
Also, the whole .htaccess lines you pasted here seem mangled and would probably just result in a 500 error. Can you please share it again, and in proper code blocks this time so the forum doesn’t try to parse it?
Well, I can tell you it’s bad. There are four RewriteEngine On statements, a Files block that’s opened but not closed, two pieces of code which both do something with WWW redirection, two blocks which do file/URL based rewriting, the second one formatted without newlines between the statements.
To be honest, I’m shocked it produces a page at all. I would fully expect Apache to fall over and die if you feed it this code.
I’m quite sure that this mess is responsible for your redirect issues. So I would highly recommend you just delete this file and start over by finding and combining relevant .htaccess snippets to do what you need to do.
You’ll probably get a much more reliable end result than when you just use someone else’s config without a clue as to what it’s even supposed to do, let alone how it does this.
First, decide what your .htaccess could should do. Sites can work perfectly fine without any .htaccess rules, so if you aren’t sure why you need them, then you can probably just delete the file and be done with it.
After that, you can just use Google to search for examples to do what you need to do and then combine those. They are all just snippets of text which you can combine in a single fine. It’s all very straight forward.
If one example doesn’t work, just try another.
That way, you may not understand exactly what each line does, but at least you’ll know what the code should be doing. It helps to add comments to the file with a short description about what it’s supposed to do and maybe the link to where you got it.
If you do this and you’ll have an issue again with www redirects, at least you’ll know which rules are responsible for www redirects, and can maybe swap them out.