php - Wordpress randomly redirects with 301 after logging in

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Situation

I'm trying to host 2 Wordpress websites on the same virtual machine.

• Site1: www.mainsite
• Site2: site2.mainsite

Each site has its own Wordpress installation and database (not multisite).

Environment

• Ubuntu 18.04
• Nginx 1.17.1
• PHP7.3-FPM
• Certbot for Let's Encrypt
• HSTS activated for domain

Problem

After installing both Wordpress websites and logging in on wp-admin. The last one starts redirecting to the other one with a 301 redirect.

Steps to reproduce:

• Clear browser cache
• Visit www.mainsite/wp-admin and login
• Visit site2.mainsite/wp-admin and login
• Visit www.mainsite
• Visit site2.mainsite -> Gets redirected to www.mainsite with X-Redirect-By: WordPress in the response header

This is not always true, sometimes it works for a few minutes before it starts to redirect. The 301 redirects get cached by the browser, so when the redirect occurs, it never works again unless I manually clear my browser cache.

Tried solutions

• Clearing browser cache, tried another computer
• Added WP_HOME and WP_SITEURL to both wp-config.php files
• Checked my Nginx server blocks and PHP-pools
• Tried separate SSL certificates with Certbot
• Tried wildcard SSL certificate with Certbot
• Reboot
• Checked both MySQL databases for URLS

---

Do I have to add something in the Wordpress config to stop the redirect? I think it has something to do with the cookie that got created when logging in.

Situation

I'm trying to host 2 Wordpress websites on the same virtual machine.

• Site1: www.mainsite
• Site2: site2.mainsite

Each site has its own Wordpress installation and database (not multisite).

Environment

• Ubuntu 18.04
• Nginx 1.17.1
• PHP7.3-FPM
• Certbot for Let's Encrypt
• HSTS activated for domain

Problem

After installing both Wordpress websites and logging in on wp-admin. The last one starts redirecting to the other one with a 301 redirect.

Steps to reproduce:

• Clear browser cache
• Visit www.mainsite/wp-admin and login
• Visit site2.mainsite/wp-admin and login
• Visit www.mainsite
• Visit site2.mainsite -> Gets redirected to www.mainsite with X-Redirect-By: WordPress in the response header

This is not always true, sometimes it works for a few minutes before it starts to redirect. The 301 redirects get cached by the browser, so when the redirect occurs, it never works again unless I manually clear my browser cache.

Tried solutions

• Clearing browser cache, tried another computer
• Added WP_HOME and WP_SITEURL to both wp-config.php files
• Checked my Nginx server blocks and PHP-pools
• Tried separate SSL certificates with Certbot
• Tried wildcard SSL certificate with Certbot
• Reboot
• Checked both MySQL databases for URLS

---

Do I have to add something in the Wordpress config to stop the redirect? I think it has something to do with the cookie that got created when logging in.

• php

Share Improve this question edited Sep 11, 2019 at 7:01 slimag 311 bronze badge asked Jul 22, 2019 at 19:10 RofniRofni 1

• Just a comment, but it sounds like the potential solution here is to log out of one site before logging in to the other. – Anaksunaman Commented Jul 23, 2019 at 5:12

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1 Answer 1

Sorted by: Reset to default 0

It seems, you have not set opcache.validate_root=1 in php.ini. It's mandatory for chrooted php-fpm with multiple pools (and unfortunately not very clearly documented).

RTFM: https://www.php/manual/en/opcache.configuration.php#ini.opcache.validate-root

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