Best Way to Get Hostname with PHP

Best way to get hostname with php

What about gethostname()?

Edit: This might not be an option I suppose, depending on your environment. It's new in PHP 5.3. php_uname('n') might work as an alternative.

How to get real host or server name in PHP

Edit: as pointed by Gumbo, the original poster probably means HTTP_HOST rather than HOST_NAME. Otherwise, my answer is plain wrong.

The HTTP_HOST variable reflects the domain name that the visitor used to access the site. If doesn't have anything to do with file paths! Its value is conveniently stored in $_SERVER['HTTP_HOST']. Is there any other way to get it? Of course, there're normally several ways to do things. For instance, this works when PHP runs as Apache module.

<?php

$request_headers = apache_request_headers();
echo $request_headers['Host'];

?>

The question is: why would anyone want to do such a thing? Why replace a reliable standard method with a quirky workaround that eventually fetches the same piece of data from the same place?

You have the concern that $_SERVER['HTTP_HOST'] is altered by the HTTP request. Of course it is: that's where it comes from. The browser has to specify what site it wants to visit (that's the base of name based virtual hosts) and if it sends a rogue value, well, it just won't reach the site.

How to get host name from php on shared hosting?

Are you looking lot the $_SERVER['HTTP_HOST']?

PHP $_SERVER['HTTP_HOST'] vs. $_SERVER['SERVER_NAME'], am I understanding the man pages correctly?

That’s probably everyone’s first thought. But it’s a little bit more difficult. See Chris Shiflett’s article SERVER_NAME Versus HTTP_HOST.

It seems that there is no silver bullet. Only when you force Apache to use the canonical name you will always get the right server name with SERVER_NAME.

So you either go with that or you check the host name against a white list:

$allowed_hosts = array('foo.example.com', 'bar.example.com');
if (!isset($_SERVER['HTTP_HOST']) || !in_array($_SERVER['HTTP_HOST'], $allowed_hosts)) {
    header($_SERVER['SERVER_PROTOCOL'].' 400 Bad Request');
    exit;
}

Get Hostname from IP

Here is the answer,the only way which i could find to get the host from the ip was :

$data = (shell_exec('nslookup ' . $ip_adress));

Here is the working code that will return your host ip:

$iper = new IpEr();
$ip_adress = $iper->Get_Ip();

    $data = (shell_exec('nslookup ' . $ip_adress));
    $data = (explode("\n",$data));
    $data = explode(":",$data[0]);
    echo trim($data[1]);

And here is the iper class if someone needs it:

<?php

class IpEr{
  public function Get_Ip(){
    if(!empty($_SERVER['HTTP_CLIENT_IP'])){
      $ip=$_SERVER['HTTP_CLIENT_IP'];
    }
    elseif(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
      $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
    }
    else{
      $ip=$_SERVER['REMOTE_ADDR'];
    }
    return  $ip;
  }
}

?>

Get Host name from given URL

you can try this

<?php  

function getHost($Address) { 
   $parseUrl = parse_url(trim($Address)); 
   return trim(isset($parseUrl['host']) ? $parseUrl['host'] : array_shift(explode('/', $parseUrl['path'], 2))); 
} 

echo getHost('http://stackoverflow.com/users/login');

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