client.ip.php

<?php

// --> L'unica funzione che funziona al 100%
// --> https://stackoverflow.com/questions/15699101/get-the-client-ip-address-using-php

  function get_client_ip() {

	    $ipaddress = '';
	    
	    if (isset($_SERVER['HTTP_CLIENT_IP']))
	        $ipaddress = $_SERVER['HTTP_CLIENT_IP'];
	    else if(isset($_SERVER['HTTP_X_FORWARDED_FOR']))
	        $ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
	    else if(isset($_SERVER['HTTP_X_FORWARDED']))
	        $ipaddress = $_SERVER['HTTP_X_FORWARDED'];
	    else if(isset($_SERVER['HTTP_FORWARDED_FOR']))
	        $ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
	    else if(isset($_SERVER['HTTP_FORWARDED']))
	        $ipaddress = $_SERVER['HTTP_FORWARDED'];
	    else if(isset($_SERVER['REMOTE_ADDR']))
	        $ipaddress = $_SERVER['REMOTE_ADDR'];
	    else
	        $ipaddress = 'UNKNOWN';
	    
	    return $ipaddress;
	
	}

?>