How To Get Domain Name From Subdomain in PHP Tutorial

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Inside this article we will see the concept i.e How To Get Domain Name From Subdomain in PHP Tutorial. Article contains the classified information about PHP Getting Domain Name From Subdomain.

If you are looking for a solution i.e PHP function to get the domain name from subdomain then this article will help you a lot for this. Tutorial is super easy to understand and implement it in your code as well.




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Let’s get started.

Application Programming

Create a folder say filter-domain in your localhost directory. Create a file index.php into it.


// Get domain name from subdomain
// Example: =>

if (!function_exists('get_domain_from_subdomain')) {

    function get_domain_from_subdomain($subdomain)
        $pieces = parse_url($subdomain);
        $domain = isset($pieces['host']) ? $pieces['host'] : '';
        if (preg_match('/(?P<domain>[a-z0-9][a-z0-9\-]{1,63}\.[a-z\.]{2,6})$/i', $domain, $regs)) {
            return $regs['domain'];
        return false;

echo get_domain_from_subdomain("");


We used PHP functions parse_url() and preg_match() with regex pattern to remove https://, www., etc.


We hope this article helped you to learn How To Get Domain Name From Subdomain in PHP Tutorial in a very detailed way.

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