static function convert_to_ci8($data)
 {
     global $charset;
     $to_ci8 = array("#" => "\\23", "à" => "\\40", "â" => "\\5b", "ç" => "\\5c", "ê" => "\\5d", "î" => "\\5e", "ô" => "\\60", "é" => "\\7b", "ù" => "\\7c", "è" => "\\7d", "û" => "\\7e");
     if (is_string($data)) {
         if ($charset == 'utf-8') {
             $data = utf8_decode($data);
         }
         $data = strtr($data, $to_ci8);
     }
     if (is_array($data)) {
         foreach ($data as $k => $v) {
             $data[$k] = printer_data_converter::convert_to_ci8($v);
         }
     }
     return $data;
 }