I need to get Public IP address of the system using PHP. I tried the following function:
function get_server_ip() {
    $ipaddress = '';
    if(getenv('HTTP_X_FORWARDED_FOR'))
        $ipaddress = getenv('HTTP_X_FORWARDED_FOR');
    else if(getenv('HTTP_X_FORWARDED'))
        $ipaddress = getenv('HTTP_X_FORWARDED');
    else if(getenv('HTTP_FORWARDED_FOR'))
        $ipaddress = getenv('HTTP_FORWARDED_FOR');
    else if(getenv('HTTP_FORWARDED'))
       $ipaddress = getenv('HTTP_FORWARDED');
    else if(getenv('REMOTE_ADDR'))
        $ipaddress = getenv('REMOTE_ADDR');
    return $ipaddress;
}
But, I got only the localhost IP 127.0.0.1. I am in need of the server's public IP address. What function is available in PHP to get my public IP address which I get from this site: http://www.whatismyip.com/
 
     
    