swapping IP Class for IP Variable

[stan003]

HI,

 

I have some code that obtains the ip address of the visitor and then looks up their ip address, a copy of the code is below:

 

function getRealIpAddr()

{
  if (!empty($_SERVER['HTTP_CLIENT_IP']))
  //check ip from share internet
  {
    $ip=$_SERVER['HTTP_CLIENT_IP'];
  }
  elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
  //to check ip is pass from proxy
  {
    $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
  }
  else
  {
    $ip=$_SERVER['REMOTE_ADDR'];
  }
  return $ip;
}

function IPtoLatLng($ip)
{
$latlngValue=array();
$dom = new DOMDocument();
$ipcheck = ip2long($ip);

    if($ipcheck == -1 || $ipcheck === false){
	echo "ERROR: INVALID IP";
	exit;
}
else
	$uri = "http://api.hostip.info/?ip=$ip&position=true";

 

No what i want to do is swap the GetRealIp for a php variable, however when i write the code like this:

 

$ip = "$ip";

function IPtoLatLng($ip)
{
$latlngValue=array();
$dom = new DOMDocument();
$ipcheck = ip2long($ip);

    if($ipcheck == -1 || $ipcheck === false){
	echo "ERROR: INVALID IP";
	exit;
}
else
	$uri = "http://api.hostip.info/?ip=$ip&position=true";

$dom->load($uri);
$name=$dom->getElementsByTagNameNS('http://www.opengis.net/gml','name')->item(1)->nodeValue;
$coordinates=$dom->getElementsByTagNameNS('http://www.opengis.net/gml','coordinates')->item(0)->nodeValue;
$temp=explode(",",$coordinates);
$latlngValue['LNG']=$temp[0];
$latlngValue['LAT']=$temp[1];
$latlngValue['NAME']=$name;
return $latlngValue;

}

 

It returns Invalid IP,

 

however no matter what i try i get the same response over and over again.

 

Any suggestions would be appreciated.

 

Thanks

 

Stan