www to non-www with .htaccess

I currently have this .htaccess: pastebin.com/gfg5ujL0
On the bottom there are the lines to redirect http urls to https.
But if I go to my site using https :// www..... it will not redirect to non-www site.
It may cause a problem for Google I think.

Do you guys kindly know which is the line to add to make this redirect?
I searched a lot and each modify I apply makes my site offline!

 

Did you get it sorted? Your pastebin has been taken down.

To do BOTH http to https and www to non www, I suggest using this:

RewriteEngine On
RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP_HOST} ^www\. [NC]
RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC]
RewriteRule ^ https://%1%{REQUEST_URI} [L,NE,R=301]

Code (markup):

You need to hit it all in one fell swoop making sure that both http and www conditions are intercepted for the SAME RewriteRule with a proper 301. Not sure what you had, but I've been using this one for about a decade and it's never failed me.

 

Thank you for the .htaccess tip
It does not work properly. If I go to my site through https :// www I'm not redirected to the non-www.
All the other redirects works
Is there a way to solve it through htaccess?

 

Define "all other". That throws up some warning flags.

Do you have any other rewriterule's in there that could be interfering? You would/should make sure that the code I provided is the FIRST such rule in your .htaccess.

Could you put your current .hta up somewhere like pastebin again? Your existing link says you deleted it.

 

This is the pastebin https://pastebin.com/Z6yCF3ug
If I put the code on top of the site doesn't work completely :S

 

Ok, see how you have more than one "RewriteEngine On" in there? Yeah, don't do that.

Where that first one is:

<IfModule mod_rewrite.c>
    RewriteEngine on
    RewriteRule ^forum-([0-9]+)\.html$ forumdisplay.php?fid=$1 [L,QSA]

Code (markup):

Insert the RewriteCond and RewriteRule I provided between the "on" and your first custom rule.

<IfModule mod_rewrite.c>
    RewriteEngine on

    RewriteCond %{HTTPS} off [OR]
    RewriteCond %{HTTP_HOST} ^www\. [NC]
    RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC]
    RewriteRule ^ https://%1%{REQUEST_URI} [L,NE,R=301]

    RewriteRule ^forum-([0-9]+)\.html$ forumdisplay.php?fid=$1 [L,QSA]

Code (markup):

Naturally getting rid of the copy you put at the end. That SHOULD do the trick.

That said, with that many rewrite rules you've possibly got some real slowdown issues, and the whole thing is going to be remarkably fragile. That some are inside the ifModule and some outside it is also a bit of a wonk.

Though the rewriteRule before the engine is even ON? Yeah, that's odd. So much of that claims to have something to do with Google "SEO" when URI rewrites have dick all to do with SEO... Is that some sort of user friendly trickery that someone who knows dick about dick claimed was for SEO? That claim is made a hell of a lot, isn't it?

Almost looks like some black-hat SEO dirtbag scammed you with disinformation at some point. Apologies if that sounds harsh, but that's what I'm seeing.

 

That Google SEO code you see is a plugin for a MyBB forum to optimize it on SE
By the way, it still does not work.
The modified .htaccess is this now :S https://pastebin.com/UxuAjmjA
If I browse the www. version it still stays on that version.

 

Ok, there are two possibilities:

1) this line:

RewriteRule ^([^&]*)&(.*)$ https://hackmix.altervista.org/$1?$2 [L,QSA,R=301]

Is somehow screwing with things. Given it's BEFORE there is even a rewriteEngineOn your server should be sending a 500 error, not working at all.

2) You have rules in your httpd.conf including a rewriteEngineOn, which are preventing anything in the .htaccess from even running. This might explain how the above rule isn't throwing an error.

If that is the case, it's possible NOTHING after the above line of code is even being run. EVER.

3) you don't have mod_rewrite installed in Apache, rendering all those redirect rules non-functional.

... and seriously, that redirect nonsense to "optimize for search" is hoodoo-voodoo at best, nonsensical halfwitted gibberish at worst. Somebody was talking out their backside when they told you to do that.