protected function filterCsvInjection($input)
    {
        // Try to prevent csv injection
        $dangers = ['=', '+', '-', '@'];
        
        // Trim leading spaces for our test
        $trimmed = trim($input);
        
        if (strlen($trimmed)>1 && in_array($trimmed[0], $dangers)) {
            return "'" . $input;
        }  else {
            return $input;
        }
    }