URL redirects to doubled version

$_SERVER['DOCUMENT_ROOT'] = '/www/home/user/public_html';
I specified the root of the document to be as exhaustive as possible.
You need to enable the rewrite engine and add the path to where your htaccess file resides.

Good for root /www/home/user/public_html:

# BEGIN WordPress

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

# END WordPress

RewriteBase is for root /

You must copy your index.php file into root folder and edit
Original:
require( dirname( __FILE__ ) . '/wp-blog-header.php' );
/www/home/user/public_html:
require( dirname( __FILE__ ) . '/new_path/wp-blog-header.php' );
Now it /www/home/user/public_html/new_path
If you use subfolder for WordPress.

Unistalling

I created the path to specify where your wordpress is located (with a path it’s easier to explain), you don’t have to enter the global SERVER variable.
If you use a different prefix for the database, both should work.
Your htaccess has no domain limits but your hosting can impose such limits, ask your hosting for info.
Currently you need to uninstall the plugin residues, I hope you read uninstall.

sorry I did not understand, does the mysite.com folder exist for the second installation? If the answer is yes, mysite.com is correct in the url even if you should ask your hosting how to hide this folder in an addon domain. (normally the url starts with root).
let me know what your hosting answers, otherwise you can solve in another way.

The real problem is the redirect from the root to the mysite.com folder, can you indicate your two domains? (for privacy you can enter xxxx instead of the real domain, for example installation 1 example.xxxxx.com installation 2 subdomain.xxxxx.com)

• This reply was modified 6 years, 5 months ago by autotutorial. Reason: Edit for missing content

# BEGIN WordPress

RewriteEngine On
RewriteBase /mysite.com/
RewriteRule ^mysite\.com/index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /mysite.com/index.php [L]

# END WordPress

you can try this htaccess for the second installation, of course you substitute mysite.com in your second installation also enter the backslash \?
Please indicate your two domains?

define('WP_SITEURL', 'https://mysite.com');
define('WP_HOME','https://mysite.com/mysite.com');

this is a temporary modification if your hosting confirms that the request to https://mysite.com is forwarded to your local path /www/home/user/public_html/mysite.com/ (this is just an example to distinguish the path for the second installation) the error is in the wordpress code and obviously also in the plugin used.

to process the code I need to know the two domains .. the mismatched redirect is part of the browser cache used. (the value of the url shown to the browser, in wordpress WP_SITEURL makes this distinction).
to verify that I’m on the right track, try visiting with the https protocol and the root.

• This reply was modified 6 years, 5 months ago by autotutorial.

we are not done, replace mysite.com in your correct addon.
use the chrome browser’s private mode.
https://mysite.com/mysite.com/index.php
https://mysite.com/mysite.com/
https://mysite.com/index.php
https://mysite.com/mysite.com/wp-json/
to check that the requests use the redirect, use an online sniffer. https://websniffer.cc/?url=https://mysite.com/

if something goes wrong replace your htaccess with this code.

# BEGIN WordPress

RewriteEngine On
RewriteBase /mysite.com/
RewriteRule ^(mysite\.com/)?index\.php$ - [L]
RewriteRule ^mysite\.com(/)?$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /mysite.com/index.php [L]

# END WordPress

This code can be modified from WordPress, because it is enclosed by the WordPress propositive tags, meaning that it can be changed at any time.

• This reply was modified 6 years, 5 months ago by autotutorial.