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 wildcard subdomain. So if I’m browsing sub.dev.example.com how do I get “sub”?

$env_domain = dev.example.com;
$subdomain = array_shift( explode( '.', $_SERVER['HTTP_HOST'] ) ) .'.'. $env_domain;
echo $subdomain;

Currently, this returns dev. I need it to return sub.

I’m thinking the best practice here would be to return the most low-level domain (the first subdomain).

Note that I’m not parsing a URL, but a given domain.

Answer 1

$domain = 'sub.dev.example.com';
$tmp = explode('.', $domain);
$subdomain = current($tmp);
print($subdomain);     // prints "sub"