Need to remove www from $_SERVER['HTTP_HOST'] how?

I need to remove www from the st开发者_StackOverflow中文版ring given by $_SERVER['HTTP_HOST']

How can I do that in PHP?

$server_name = str_replace("www.", "", $_SERVER['HTTP_HOST']);

That should do the trick...

if (substr($_SERVER['HTTP_HOST'], 0, 4) == 'www.') {
    $domain = substr($_SERVER['HTTP_HOST'], 4);
} else {
    $domain = $_SERVER['HTTP_HOST'];
}

Client requested site name "www.example.com"

// explode the string at the '.' and inserts into an array 
$pieces = explode(".", $_SERVER['HTTP_HOST']); 
// $pieces array is now:
// now $pieces[0] contains "www"
// now $pieces[1] contains "example"
// now $pieces[2] contains "com"
// Put the domain name back together using concatenation operator ('.')
$DomainNameWithoutHostPortion =  $pieces[1].'.'.$pieces[2];
// now $DomainNameWithoutHostPortion contains "example.com"

Instead of str_replace, you could use ltrim:

$sender_domain = $_SERVER[HTTP_HOST];
$sender_domain = ltrim($sender_domain, 'www.');

Do you want this:

$_SERVER['HTTP_HOST'] = str_replace('www.', '',$_SERVER['HTTP_HOST']);

Here

$host = str_replace('www.', null, $_SERVER['HTTP_HOST'])

You can also

 $ht = "http://";
 $host = str_replace('www.',$ht, $_SERVER['HTTP_HOST'])