What is the best way to extract a specific part of a domain name in a PHP file?

To extract a specific part of a domain name in a PHP file, you can use the `parse_url` function to break down the URL into its components, and then further manipulate the components to extract the desired part. For example, if you want to extract the subdomain from a URL, you can split the host part of the URL by the dot (.) and retrieve the first part. 

$url = "http://subdomain.example.com";
$host = parse_url($url, PHP_URL_HOST);
$parts = explode('.', $host);
$subdomain = $parts[0];

echo $subdomain; // Output: subdomain

Keywords

PHP domain name extract substring regular expression

Related Questions