Print the given data as a QR code on the printer.
| public qrCode ( string $content, integer $ec = Printer::QR_ECLEVEL_L, integer $size = 3, integer $model = Printer::QR_MODEL_2 ) | ||
| $content | string | The content of the code. Numeric data will be more efficiently compacted. |
| $ec | integer | Error-correction level to use. One of Printer::QR_ECLEVEL_L (default), Printer::QR_ECLEVEL_M, Printer::QR_ECLEVEL_Q or Printer::QR_ECLEVEL_H. Higher error correction results in a less compact code. |
| $size | integer | Pixel size to use. Must be 1-16 (default 3) |
| $model | integer | QR code model to use. Must be one of Printer::QR_MODEL_1, Printer::QR_MODEL_2 (default) or Printer::QR_MICRO (not supported by all printers). |
} catch (Exception $e) {
/* Images not supported on your PHP, or image file not found */
$printer->text($e->getMessage() . "\n");
}
$printer->cut();
/* Bit image */
try {
$logo = EscposImage::load("resources/escpos-php.png", false);
$imgModes = array(Printer::IMG_DEFAULT, Printer::IMG_DOUBLE_WIDTH, Printer::IMG_DOUBLE_HEIGHT, Printer::IMG_DOUBLE_WIDTH | Printer::IMG_DOUBLE_HEIGHT);
foreach ($imgModes as $mode) {
$printer->bitImage($logo, $mode);
}
} catch (Exception $e) {
/* Images not supported on your PHP, or image file not found */
$printer->text($e->getMessage() . "\n");
}
$printer->cut();
/* QR Code - see also the more in-depth demo at qr-code.php */
$testStr = "Testing 123";
$models = array(Printer::QR_MODEL_1 => "QR Model 1", Printer::QR_MODEL_2 => "QR Model 2 (default)", Printer::QR_MICRO => "Micro QR code\n(not supported on all printers)");
foreach ($models as $model => $name) {
$printer->qrCode($testStr, Printer::QR_ECLEVEL_L, 3, $model);
$printer->text("{$name}\n");
$printer->feed();
}
$printer->cut();
/* Pulse */
$printer->pulse();
/* Always close the printer! On some PrintConnectors, no actual
* data is sent until the printer is closed. */
$printer->close();
