如何将域名拆分为sld和tld（扩展名）？

Question

The domain's need to be returned as the actual domain name, and the extension, separately

http://www.something.com

should return: sld = something, tld= com

something.co.uk

should return: sld = something, tld= co.uk

I am not much familiar with regular expressions, so I really need some help in handling this.

I suppose I can use parse_url(), and check the host, but what then?

Answer 1

Just as you said, you can use $urlCompontents=parseUrl($url) to get the hostname. Then you could use explode(".",$urlCompontents["host"]) to split the hostname into the different parts, e.G. array("example","co","uk"). You'll have to do the rest by comparing the parts against a list, because there is no fixed rule that e.G. "uk" by itself is not considered a TLD but "co.uk" is. But you don't need any regular expressions here.