PHP REGEX: Get domain from URL

Question

What I want

---

I want to get from a URL the domain part so from http://example.com/ -> example.com

Answer 1

Assumes that http:// prefixes everything.

$tmp = explode("/", $url);
$domain = $tmp[2];

Answer 2

$tmp = parse_url($url);
$url = $tmp['host']

Answer 3

This is like the regex from theraccoonbear but with support for HTTPS domains.

if (preg_match('/https?:\/\/([^\/]+)\//i', $target_string, $matches)) {
  $domain = $matches[1];
}