Remove protocl and subdomain from URL - php

Question

I have a string like this:
http://www.downlinegoldmine.com/viralmarketing
I need to remove http://www. from the string if it exists, as well as http:// if www is not included.
In few words I just need the domain name without any protocol.

Answer 1

parse_url is the perfect tool for the job. You would first call it to split the url in parts, then check the hostname part to see if it starts with www. and strip it, then assemble the url back.
Update: code
echo normalize_url('http://www.downlinegoldmine.com/viralmarketing');
function normalize_url($url) {
$parts = parse_url($url);
unset($parts['scheme']);
if (substr($parts['hostname'], 0, 4) == 'www.') {
$parts['hostname'] = substr($parts['hostname'], 4);
}
if (function_exists('http_build_url')) {
// This PECL extension makes life a lot easier
return http_build_url($parts);
}
// Otherwise it's the hard way
$result = null;
if (!empty($parts['username'])) {
$result .= $parts['username'];
if (!empty($parts['password'])) {
$result .= ':'.$parts['password'];
}
$result .= '#';
}
$result .= $parts['host'].$parts['path'];
if (!empty($parts['query'])) {
$result .= '?'.$parts['query'];
}
if (!empty($parts['fragment'])) {
$result .= '#'.$parts['fragment'];
}
return $result;
}
See it in action.

Answer 2

Just use parse_url (see: http://php.net/manual/de/function.parse-url.php ). It will also incorporate different protocols and paths etc.

Answer 3

$nvar = preg_replace("#http://(www\.)?#i", "", "http://www.downlinegoldmine.com/viralmarketing");
Test:
php> echo preg_replace("#http://(www\.)?#i", "", "http://www.downlinegoldmine.com/viralmarketing");
downlinegoldmine.com/viralmarketing
php> echo preg_replace("#http://(www\.)?#i", "", "http://downlinegoldmine.com/viralmarketing");
downlinegoldmine.com/viralmarketing

Answer 4

There's probably a better way, but:
$url = preg_replace("#^(http://)?(www\\.)?#i", "", $url);

Answer 5

$url = strncmp('http://', $url, 7) ? $url : substr($url, 7);
$url = strncmp('www.', $url, 4) ? $url : substr($url, 4);

Answer 6

You can use the following to remove the https://, http://, and www. from a url.
$url = 'http://www.downlinegoldmine.com/viralmarketing';
echo preg_replace('/https?:\/\/|www./', '', $url);
above returns downlinegoldmine.com/viralmarketing
and you can use the following to remove the urls path as well as the https://, http://, and www..
$url = 'http://www.downlinegoldmine.com/viralmarketing';
echo implode('/', array_slice(explode('/',preg_replace('/https?:\/\/|www./', '', $url)), 0, 1));
above returns downlinegoldmine.com