How to Create Dynamic Subdomains Using .htaccess and PHP?

Create Subdomains Dynamically Using .htaccess and PHP

Creating a Dynamic Subdomain System

To achieve dynamic subdomain creation, it involves a combination of DNS configuration, Apache Virtual Hosting, and PHP implementation. Here's a detailed breakdown:

1. DNS Wildcard Configuration

On your DNS server, set up a wildcard domain record such as *.website.example. This allows all subdomains under website.example to point to the same IP address.

2. Apache Virtual Host Configuration

In Apache's virtual host configuration, specify the wildcard domain as an alias. For example:

<VirtualHost *:80>
  ServerName server.website.example
  ServerAlias *.website.example
  UseCanonicalName Off
</VirtualHost>

3. PHP Subdomain Extraction

In PHP, use the $_SERVER superglobal variable to extract the subdomain:

preg_match('/([^.]+)\.website\.example/', $_SERVER['SERVER_NAME'], $matches);
if (isset($matches[1])) {
    $subdomain = $matches[1];
}

4. Content Customization

Once the subdomain is extracted, you can display customized content specific to each subdomain, such as a user's account area.

Mass Virtual Hosting (Optional)

This approach differs from the above and is typically used to host multiple distinct websites. For more information, refer to Apache's documentation on Mass Virtual Hosting.

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