WordPress staging子域名根页面跳转至主站/php 404问题求助

Hey Jon, let's work through this root page redirect problem together. Since your staging site's wp-admin and individual pages (like /sample-page/) load fine, the issue is almost certainly related to site URL configuration, rewrite rules, or server defaults. Here's what to check step by step:

1. Verify WordPress Site URL Settings #

First, confirm your staging site's core URL settings are pointing correctly:

• Log into your staging wp-admin, go to Settings > General
• Make sure both WordPress Address (URL) and Site Address (URL) are set to https://staging.website.com (adjust HTTP/HTTPS as needed)
• If you can't access the settings page or changes don't stick, edit your wp-config.php file in the staging root directory and add these lines above the /* That's all, stop editing! Happy publishing. */ comment:

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

• Save the file, then clear your browser cache and any WordPress cache (if using a plugin like WP Rocket or W3 Total Cache)

2. Check .htaccess Rewrite Rules #

Your staging site's .htaccess file might have incorrect rewrite rules causing the redirect:

• Access your staging server via FTP/SFTP or cPanel File Manager (enable hidden files to see .htaccess)
• Replace any existing rules with the default WordPress rewrite rules (back up the original first):

  # BEGIN WordPress
  <IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteBase /
  RewriteRule ^index\.php$ - [L]
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule . /index.php [L]
  </IfModule>
  # END WordPress
  

• Save the file and test accessing staging.website.com again

3. Confirm Server Default Document Configuration #

Sometimes servers prioritize non-PHP files or have missing defaults:

For Apache: #

Add this line to your staging .htaccess to ensure index.php is the first default file:

DirectoryIndex index.php index.html index.htm

For Nginx: #

Check your staging site's Nginx configuration file (usually in /etc/nginx/sites-available/) and ensure the location / block includes index.php first:

location / {
    index index.php index.html index.htm;
    try_files $uri $uri/ /index.php?$args;
}

• Restart your web server (Apache: sudo systemctl restart apache2; Nginx: sudo systemctl restart nginx) after making changes

4. Clear Cache & Disable CDN (If Applicable) #

Cached redirects can persist even after fixing settings:

• If you use a CDN for your domain, purge all CDN cache for the staging subdomain
• Temporarily disable any WordPress caching plugins on the staging site and test again
• Clear your browser's cache and try accessing the root page in incognito mode to rule out local caching

5. Check Server-Level Redirects #

Some hosting control panels (like cPanel) let you set redirects at the server level:

• Log into your hosting account, look for a Redirects tool
• Check if there's an active redirect rule pointing staging.website.com to website.com/php
• Delete any such rule if it exists

If none of these steps resolve the issue, reach out to your hosting provider—they might have a server-level configuration (like a global redirect rule) that's overriding your staging site's settings.

内容的提问来源于stack exchange，提问作者Jon Williams