Функции взяты с какой-то CMS.
            
              
                  function getUri() {
                      $requestURI = explode('/', $_SERVER['REQUEST_URI']);
                      $scriptName = explode('/',$_SERVER['SCRIPT_NAME']);
              
                      for($i= 0;$i < sizeof($scriptName);$i++) {
                          if ($requestURI[$i] == $scriptName[$i]) {
                              unset($requestURI[$i]);
                          }
                      }
                      
                      $uri = array_values($requestURI);
              
                      if(isset($uri[0])) { $pos = strrpos($uri[0], "?"); if ($pos === false) { $uri[0] = sanitizeURL($uri[0]); } else { $uri[0] = sanitizeURL(substr($uri[0], 0, $pos)); } }
                      if(isset($uri[1])) { $pos = strrpos($uri[1], "?"); if ($pos === false) { $uri[1] = sanitizeURL($uri[1]); } else { $uri[1] = sanitizeURL(substr($uri[1], 0, $pos)); } }
                      if(isset($uri[2])) { $pos = strrpos($uri[2], "?"); if ($pos === false) { $uri[2] = sanitizeURL($uri[2]); } else { $uri[2] = sanitizeURL(substr($uri[2], 0, $pos)); } }
                      if(isset($uri[3])) { $pos = strrpos($uri[3], "?"); if ($pos === false) { $uri[3] = sanitizeURL($uri[3]); } else { $uri[3] = sanitizeURL(substr($uri[3], 0, $pos)); } }
                      if(isset($uri[4])) { $pos = strrpos($uri[4], "?"); if ($pos === false) { $uri[4] = sanitizeURL($uri[4]); } else { $uri[4] = sanitizeURL(substr($uri[4], 0, $pos)); } }
                      if(isset($uri[5])) { $pos = strrpos($uri[5], "?"); if ($pos === false) { $uri[5] = sanitizeURL($uri[5]); } else { $uri[5] = sanitizeURL(substr($uri[5], 0, $pos)); } }
              
                      return $uri;
                  }
                  
                  function sanitizeURL($url) {
                       $url = trim($url);
                       $url = rawurldecode($url);
                       $url = str_replace(array('--','"','!','@','#','$','%','^','*','(',')','+','{','}','|',':','"','<','>',
                                                '[',']','\\',';',"'",',','/','*','+','~','`','laquo','raquo',']>','‘','’','“' ,'”'
              ,'–' ,'—'),
                                          array('-','-','','','','','','','','','','','','','','','','','','','','','','','','','','','',''),
                                          $url);
                       $url = str_replace('--','-',$url);
                       $url = rtrim($url, "-");
                       return $url;
                   }    
                  
                  print_r(getUri());
            
            .htaccess
            
              
                  RewriteEngine on
                  RewriteBase /
                  RewriteCond %{REQUEST_FILENAME} !-f
                  RewriteCond %{REQUEST_FILENAME} !-d
                  RewriteRule ^(.*)$ index.php [QSA,L]
              
            
            Скрипт разбивает ГЕТ запрос и создает массив. В данной реализации можно вводить до 6 параметров http://site/param1/param2/../param6.