ciao ragazzi in rete ho trovato questo file:

Codice PHP:
<?php
/**
 * @version 1.0
 * @package SNB proxy
 * @copyright &copy; 2008 security-net.biz
 * @author Ivan Markovic <ivanm@security-net.biz>
 */
 
/**
 * Proxy check functions.
 * Collection of some functions that can help proxy detection
 * Contains common methods needed as:
 * headers check, open ports check, cookie trap.
 * 
 * Sample usage:
 * $myProxy = new proxyCheck();
 * $myProxy->serverVar = $_SERVER;
 * $headers = $myProxy->checkHeder();
 * $ports = $myProxy->checkPort();
 */

class proxyCheck {
      
      /**
       * Server vars ($_SERVER)
       * @access public
       * @var array
       */
      var $serverVar = array();
      
       /**
       * Timeout for fsockopen
       * @access public
       * @var int
       */
      var $timeout = 5;
      
      /**
       * Common ports for testing
       * @access public
       * @var array
       */
      var $ports = array(3128,8080,80);
      
      /**
       * Cookie name
       * @access public
       * @var string
       */
      var $cookieName = "proxyCheck";
      
      /**
       * Finded headers
       * @access private
       * @var array
       */
      private $proxyHeder = array();
      
      /**
       * Finded open ports
       * @access private
       * @var array
       */
      private $portsData = array();
      
      
      /**
         * proxyCheck constructor
         * @access public
         */
        function proxyCheck() {
            // TODO
        }
    
        /**
         * Check usual proxy headers
         * @return array data
         * @access public
         */
        function checkHeader() {
            
              if(isset($this->serverVar['HTTP_X_FORWARDED_FOR'])) {
                      $this->proxyHeder['HTTP_X_FORWARDED_FOR'] = $this->serverVar['HTTP_X_FORWARDED_FOR'];
              }
              
            if(isset($this->serverVar['HTTP_X_FORWARDED'])) {
                    $this->proxyHeder['HTTP_X_FORWARDED'] = $this->serverVar['HTTP_X_FORWARDED'];
              }
              
              if(isset($this->serverVar['HTTP_FORWARDED'])) {
                    $this->proxyHeder['HTTP_FORWARDED'] = $this->serverVar['HTTP_FORWARDED'];
              }
              
              if(isset($this->serverVar['HTTP_PROXY_AGENT'])) {
                    $this->proxyHeder['HTTP_PROXY_AGENT'] = $this->serverVar['HTTP_PROXY_AGENT'];
              }
              
              if(isset($this->serverVar['HTTP_VIA'])) {
                    $this->proxyHeder['HTTP_VIA'] = $this->serverVar['HTTP_VIA'];
              }
              
              if(isset($this->serverVar['HTTP_PROXY_CONNECTION'])) {
                    $this->proxyHeder['HTTP_PROXY_CONNECTION'] = $this->serverVar['HTTP_PROXY_CONNECTION'];
              }
              
              if(isset($this->serverVar['HTTP_CLIENT_IP'])) {
                    $this->proxyHeder['HTTP_CLIENT_IP'] = $this->serverVar['HTTP_CLIENT_IP'];
              }
              
              return $this->proxyHeder;
        }
        
        /**
         * Check common ports
         * @param string ip
         * @return array data
         * @access public
         */
        function checkPort($ip = '') {
            
              if(empty($ip)) $ip = $this->serverVar['REMOTE_ADDR'];
            
                foreach($this->ports as $port) {
                        $fp = @fsockopen($ip,$port,$errno,$errstr,$this->timeout);
                        if(!empty($fp)) $this->portsData[$port] == $port;
                        @fclose($fp);
                }
                
                return $this->portsData;
        }
        
        /**
         * Cookie trap
         * @return true on finded proxy
         * @access public
         */
        function checkCookie() {
                if(isset($_COOKIE[$this->cookieName])) {
                        if($this->serverVar['REMOTE_ADDR'] != $_COOKIE[$this->cookieName]) return true;
                } else {
                        @setcookie($this->cookieName, $this->serverVar['REMOTE_ADDR']);    
                }
        }
        
}

?>
mi chidevo usando uno script che non utilizza i cookies ma database posso includerlo in una pagina e funziona oppure no???