PHP URL Parsing & disecting

We had a few questions like this before, but I can't find a good one right now either. The crux is, this cannot be done reliably. You would need a long list of special TLDs (like .uk and .au) which have their own .com/.net level.

But as general approach and simple solution you could use:

preg_match('#([\w-]+)\.(\w+(\.(au|uk))?)\.?$#i', $domain, $m);
list(, $domain, $suffix) = $m;

You will need to maintain a list of extensions for most accurate results I believe.

$possibleExtensions = array(
    '.com',
    '.co.uk',
    '.com.au'
);

// parse_url() needs a protocol.
$str = 'http://' . $str;

// Use parse_url() to take into account any paths
// or fragments that may end up being there.
$host = parse_url($str, PHP_URL_HOST);

foreach($possibleExtensions as $ext) {

    if (preg_match('/' . preg_quote($ext, '/') . '\Z/', $host)) {
       $domainNameSuffix = $ext;
       // Strip extension     
       $domainName = substr($str, 0, -strlen($ext));
       // Strip off http://           
       $domainName = substr($domainName, 7);
       var_dump($domainName, $domainNameSuffix);
       break;

    }

}

If you never have any paths or extra stuff, you can of course skip the parse_url() and the http:// adding and removal.

It worked for all your tests.

There isn't a builtin function for this.

A quick google search lead me to http://www.wallpaperama.com/forums/php-function-remove-domain-name-get-tld-splitter-split-t5824.html

This leads me to believe you need to maintain a list of valid TLD's to split URLs on.

Alright chaps, here's how I solved it, for now. Implementation of more domain names will be done as well, at some point in the future. Don't know what technique I'll use, yet.

# Setting options, single and dual part domain extentions
$v2_onePart = array(
                "com"
                );
$v2_twoPart = array(
                "co.uk",
                "com.au"
                );

$v2_url         = $_SERVER['SERVER_NAME'];      # "example.com"     OR  "example.com.au"
$v2_bits        = explode(".", $v2_url);        # "example", "com"  OR  "example", "com", "au"
$v2_bits        = array_reverse($v2_bits);      # "com", "example"  OR  "au", "com", "example"      (Reversing to eliminate foo.bar.example.com.au problems.)

switch ($v2_bits) {
    case in_array($v2_bits[1] . "." . $v2_bits[0], $v2_twoPart):
        $v2_class   = $v2_bits[2] . " " . $v2_bits[1] . "_" . $v2_bits[0];  # "example com_au"
        break;
    case in_array($v2_bits[0], $v2_onePart):
        $v2_class   = $v2_bits[1] . " " . $v2_bits[0];  # "example com"
        break;
}