* The use case here is an Epson TM-T20II and German text.
*
* Background: Not all ESC/POS features are available in the driver, so sometimes
* you might want to send a custom commnad. This is useful for testing
* new features.
*
* The Escpos::text() function removes non-printable characters as a precaution,
* so that commands cannot be injected into user input. To send raw data to
* the printer, you need to write bytes to the underlying PrintConnector.
*
* If you get a new command working, please file an issue on GitHub with a code
* snippet so that it can be incorporated into escpos-php.
*/
/* Set up profile & connector */
$connector = new FilePrintConnector("php://output");
$profile = DefaultCapabilityProfile::getInstance();
// Works for Epson printers
$printer = new Escpos($connector, $profile);
$cmd = Escpos::ESC . "V" . chr(1);
// Try out 90-degree rotation.
$printer->getPrintConnector()->write($cmd);
$printer->text("Beispieltext in Deutsch\n");
$printer->cut();
$printer->close();
/*
* Hex-dump of output confirms that ESC V 1 being sent:
*
* 0000000 033 @ 033 V 001 B e i s p i e l t e x
* 0000010 t i n D e u t s c h \n 035 V A
* 0000020 003
*/