自定义htaccess解决Hostgator上WordPress SSL相关Error 500问题

Hey there, sorry to hear you're hitting that 500 error on your HostGator subdirectory WordPress site—let's work through this without CloudFlare. I've debugged similar issues before, so here are targeted fixes to try:

Subdirectory WordPress installs often have misconfigured .htaccess files, especially when SSL is involved. First, back up your existing .htaccess file, then replace it with this SSL-compatible, subdirectory-specific configuration:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /your-subdirectory-name/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /your-subdirectory-name/index.php [L]
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
</IfModule>
# END WordPress

Make sure to replace your-subdirectory-name with the actual name of your subdirectory. After updating, set the file permissions to 644—too strict or loose permissions can trigger server errors.

HostGator's default PHP settings might not match WordPress's requirements, leading to 500 errors:

• Log into your HostGator cPanel, find the Select PHP Version tool, and switch to a WordPress-recommended version (PHP 8.1 or 8.2 works best for most sites).
• Tweak PHP parameters: In the PHP settings panel, set memory_limit to at least 256M, max_execution_time to 120, and post_max_size/upload_max_filesize to a reasonable value like 64M.

Plugins (especially cache or SSL-focused ones) or custom themes can break subdirectory installs:

• Via FTP or cPanel File Manager, rename your wp-content/plugins folder to plugins-disabled. If non-home pages start working, rename plugins one by one to find the problematic one.
• Similarly, rename your active theme folder (e.g., twentytwentyfour-disabled) to force WordPress to use a default theme like Twenty Twenty-Four. If this fixes the issue, your theme has a conflict.

A 500 error is generic—server logs will tell you the real issue:

• In HostGator cPanel, look for the Error Logs tool. Check recent entries for specific errors like:
  • PHP Fatal error: Allowed memory size exhausted (fix via PHP memory limit adjustment)
  • Invalid command 'RewriteEngine' (mod_rewrite is disabled—contact HostGator support to enable it)
  • Permission-related errors (fix via step 5)

Even if your home page has an SSL lock, subdirectory SSL might be incomplete:

• In HostGator cPanel's SSL/TLS section, confirm your SSL certificate covers subdirectories (most standard certificates do).
• Set your WordPress URLs correctly: If you can access the WP admin, go to Settings > General and update both "WordPress Address (URL)" and "Site Address (URL)" to https://yourdomain.com/your-subdirectory-name. If you can't access the admin, add these lines to your wp-config.php file:

define('WP_HOME','https://yourdomain.com/your-subdirectory-name');
define('WP_SITEURL','https://yourdomain.com/your-subdirectory-name');

Incorrect permissions can prevent the server from reading files:

• Set directory permissions to 755 and file permissions to 644 (you can use FTP or cPanel File Manager to batch update these).
• For extra security, set wp-config.php permissions to 600.

内容的提问来源于stack exchange，提问作者Ludovi