How to get the first subdomain with PHP?

Question

I have a static domain of dev.example.com with wildcard subdomains like so *.dev.example.com.

I need to detect the name of the current wild

Answer 1

Here's a little function that'll do the trick. Just stick $_SERVER['HTTP_HOST'] into the function and you should get what you want

function getSubDomain ($domain) {
    $eDom = explode('.', $domain);
    return $eDom[0];
}

echo getSubDomain('sub.dev.example.com'); // echo 'sub'