// Function that decides to return as remote address the HTTP_X_FORWARDED_FOR (if exists) for cases of reverse proxy
function Actual_REMOTE_ADDR()
{
	// DEFINE HERE THE IP ADDRESSE(s) OF REVERSE PROXY(s)
	$reverse_proxy_addresses = array('15.14.13.1');
	
	$client_address = $_SERVER['REMOTE_ADDR'];
	
	// Check if resolved REMOTE_ADDR is one of the reverse proxy address
	$revpr_found = in_array($client_address, $reverse_proxy_addresses);
	
	// If so, try to get the HTTP_X_FORWARDED_FOR value of the request's header
	if($revpr_found)
	{
		if(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && $_SERVER['HTTP_X_FORWARDED_FOR'] !== "")
		{
			$client_address = $_SERVER['HTTP_X_FORWARDED_FOR'];
			$client_arr = explode(",", $client_address);
			
			// It happens, for some networks, if app is behind reverse proxy, $client_address to have 2 values
			// Must get the first one only
			if(count($client_arr) > 1)
				$client_address = $client_arr[0];
		}
	}
	
	return $client_address;
}