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70bd5a8 Mar 28, 2016
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<?php
/* Demonstration of available options on the qrCode() command */
require __DIR__ . '/../autoload.php';
use Mike42\Escpos\Printer;
use Mike42\Escpos\PrintConnectors\FilePrintConnector;
$connector = new FilePrintConnector("php://stdout");
$printer = new Printer($connector);
// Most simple example
title($printer, "QR code demo\n");
$testStr = "Testing 123";
$printer -> qrCode($testStr);
$printer -> text("Most simple example\n");
$printer -> feed();
// Demo that alignment is the same as text
$printer -> setJustification(Printer::JUSTIFY_CENTER);
$printer -> qrCode($testStr);
$printer -> text("Same example, centred\n");
$printer -> setJustification();
$printer -> feed();
// Demo of numeric data being packed more densly
title($printer, "Data encoding\n");
$test = array(
"Numeric" => "0123456789012345678901234567890123456789",
"Alphanumeric" => "abcdefghijklmnopqrstuvwxyzabcdefghijklmn",
"Binary" => str_repeat("\0", 40));
foreach ($test as $type => $data) {
$printer -> qrCode($data);
$printer -> text("$type\n");
$printer -> feed();
}
// Demo of error correction
title($printer, "Error correction\n");
$ec = array(
Printer::QR_ECLEVEL_L => "L",
Printer::QR_ECLEVEL_M => "M",
Printer::QR_ECLEVEL_Q => "Q",
Printer::QR_ECLEVEL_H => "H");
foreach ($ec as $level => $name) {
$printer -> qrCode($testStr, $level);
$printer -> text("Error correction $name\n");
$printer -> feed();
}
// Change size
title($printer, "Pixel size\n");
$sizes = array(
1 => "(minimum)",
2 => "",
3 => "(default)",
4 => "",
5 => "",
10 => "",
16 => "(maximum)");
foreach ($sizes as $size => $label) {
$printer -> qrCode($testStr, Printer::QR_ECLEVEL_L, $size);
$printer -> text("Pixel size $size $label\n");
$printer -> feed();
}
// Change model
title($printer, "QR model\n");
$models = array(
Printer::QR_MODEL_1 => "QR Model 1",
Printer::QR_MODEL_2 => "QR Model 2 (default)",
Printer::QR_MICRO => "Micro QR code\n(not supported on all printers)");
foreach ($models as $model => $name) {
$printer -> qrCode($testStr, Printer::QR_ECLEVEL_L, 3, $model);
$printer -> text("$name\n");
$printer -> feed();
}
// Cut & close
$printer -> cut();
$printer -> close();
function title(Printer $printer, $str)
{
$printer -> selectPrintMode(Printer::MODE_DOUBLE_HEIGHT | Printer::MODE_DOUBLE_WIDTH);
$printer -> text($str);
$printer -> selectPrintMode();
}