extract domain name from HTTP_ABC

[Parvati]

I would like to extract the domain name (e.g. techarena.in) from the URL (http://www.techarena.in/test/test-page.html) so that in any case the site tries to add the link to my site on any page of their site. Thus, I could test the domain name and forward emails accordingly. For this I tested the code with the help of explode() but that doesn't worked. So can you help me how should I do that?

[opaper]

I think the below code should work:

<?php
$siteurl = 'http://username:password@hostname/path?arg=value#anchor';
 
print_r(parse_url($siteurl));
 
echo parse_url($siteurl, SITE_PATH);
?>

This should result you with

Array
(
[scheme] => http
[host] => hostname
[username] => username
[password] => password
[path] => /path
[query] => arg=value
[fragment] => anchor
)

[!const]

Yes you can do that but instead of using explode(), you have to use parse_url() which will check the url and convert the webpage link into the link that you want. For this you specify the term that you want to check in the link. Modify your php code to parse the $_SESSION['techarena'].

[Parvati]

Thank you for the help and for that information but I am unable to find it on php.net. And I recently understood how to use explode(), and according to me far more better than parse_url(). Here is my PHP code:

$siteurl = $_SESSION['techarena'];
$refhost = parse_url($siteurl, SITE_HOST);
if ($refhost == 'techarena.in' || $refhost == 'www.techarena.in') {
$recipients = "admin@techarena.in,my@email.com";
}
else {
$recipients = "my@email.com";
} 

[CodGuru]

For example if the domain name is something like "www.techarena.in" then you code it as below:

function GetDomain($siteurl)
{
    $replacewww = ereg_replace('www\.','',$siteurl);
    $domainname = parse_url($replacewww);
    if(!empty($domainname["host"]))
    {
        return $domainname["host"];
    } 
    else
    {
        return $domainname["path"];
    }
} 

[void]

 <?php
    preg_match("/^(http:\/\/)?([^\/]+)/i", "http://www.techarena.in/index.html", $domain);
    $domainname = $domain[2];
    preg_match("/[^\.\/]+\.[^\.\/]+$/", $domainname, $domain);
    echo "domain name is: {$domain[0]}\n";
    /* Output is techarena.in */
?>