code: protected function checkAllIntegers()
      {
          $foundNonInt = false;
  
          $args = func_get_args();
  
          foreach ($args as $arg) {
              if (!is_int($arg)) {
                  $foundNonInt = true;
                  break;
              }
          }
  
          return !$foundNonInt;
      }
docs: Check if all parameters to the current function are integers
  
  @param mixed
  @return boolean true if all parameters are integers