/**
  * 获取路由数组
  * @return type
  */
 private static function getRouteArray()
 {
     //获取请求URL
     $requestUrl = ltrim(rtrim($_SERVER['REQUEST_URI'], '/'), '/');
     //处理特殊情况,去掉index.php/
     if (substr($requestUrl, 0, 9) == 'index.php') {
         $requestUrl = substr($requestUrl, 10);
     }
     //去除?以后的所有参数
     $requestUrl = String::urlSafetyFilter($requestUrl);
     $requestUrlArr = explode('?', $requestUrl);
     //处理请求URL
     $requestUrlArr = explode('/', $requestUrlArr[0]);
     if (count($requestUrlArr) == 0) {
         error_404();
     }
     $requestUrlArr = self::secondDomainFilter($requestUrlArr);
     return $requestUrlArr;
 }
 /**
  * 获取过滤后的参数
  *
  * @return mixed
  */
 public static function paramFilter($param)
 {
     if (empty($param)) {
         $param = '';
     }
     if (is_array($param)) {
         foreach ($param as $key => $value) {
             $param[$key] = String::urlSafetyFilter($value);
         }
     }
     if (is_string($param)) {
         $param = String::urlSafetyFilter($param);
     }
     return $param;
 }