Mike42\Escpos\Printer::setBarcodeTextPosition PHP Method

    public function setBarcodeTextPosition($position = Printer::BARCODE_TEXT_NONE)
    {
        self::validateInteger($position, 0, 3, __FUNCTION__, "Barcode text position");
        $this->connector->write(self::GS . "H" . chr($position));
    }

<?php

require __DIR__ . '/../../autoload.php';
use Mike42\Escpos\Printer;
use Mike42\Escpos\PrintConnectors\FilePrintConnector;
$a = "{A012323392982";
$b = "{B012323392982";
$c = "{C" . chr(01) . chr(23) . chr(23) . chr(39) . chr(29) . chr(82);
$connector = new FilePrintConnector("php://stdout");
$printer = new Printer($connector);
$printer->setJustification(Printer::JUSTIFY_CENTER);
$printer->setBarcodeHeight(48);
$printer->setBarcodeTextPosition(Printer::BARCODE_TEXT_BELOW);
foreach (array($a, $b, $c) as $item) {
    $printer->barcode($item, Printer::BARCODE_CODE128);
    $printer->feed(1);
}
$printer->cut();
$printer->close();