如何将子域名所有流量（含全路径）重定向至主域名指定URL？

Got it, let's fix this redirect issue once and for all! You want every single request to http://sub.example.com—no matter the path (articles, pages, categories, tags, you name it)—to land straight on http://example.com/photos. Below are reliable, tested solutions based on your server setup:

For Apache Servers (Using .htaccess) #

First, make sure the mod_rewrite module is enabled on your Apache server. Then add these rules to the .htaccess file in the root directory of your subdomain:

# Enable rewrite engine
RewriteEngine On

# Match all requests to sub.example.com (case-insensitive)
RewriteCond %{HTTP_HOST} ^sub\.example\.com$ [NC]
# Redirect every path to the target URL (301 = permanent redirect for SEO)
RewriteRule ^(.*)$ http://example.com/photos [L,R=301]

• [NC] ensures the host match works regardless of uppercase/lowercase (e.g., Sub.Example.Com will still redirect)
• [R=301] sets a permanent redirect, which is optimal for preserving search engine rankings
• [L] tells Apache to stop processing any further rewrite rules after this one

For Nginx Servers #

Edit your Nginx configuration file (usually located in /etc/nginx/sites-available/ or similar) and add a dedicated server block for your subdomain:

server {
    listen 80;
    server_name sub.example.com;

    # Redirect all requests immediately to the target URL
    return 301 http://example.com/photos;
}

After saving the config, restart Nginx with sudo systemctl restart nginx to apply changes. This is a clean, efficient server-level redirect that avoids extra processing overhead.

Quick Verification Test #

To confirm the redirect works as expected, run this command in your terminal:

curl -I http://sub.example.com/any/random/article-path

Look for a Location: http://example.com/photos header and a 301 Moved Permanently status code in the output—this means the redirect is functioning correctly.

内容的提问来源于stack exchange，提问作者user5017650