public static function set_appearance($dataDir = null)
{
$bb = new BarCodeBuilder();
# Set up code text (data to be encoded)
$bb->setCodeText("1234567");
# Set up code text color
$color = new Color();
$bb->setCodeTextColor($color->RED);
# Set the location of the code text to above the barcode
$codeLocation = new CodeLocation();
$bb->setCodeLocation($codeLocation->Above);
#Increase the space between code text and barcode to 1 point
$bb->setCodeTextSpace(1.0);
# Set the symbology type to Code128
$symbology = new Symbology();
$bb->setSymbologyType($symbology->Code128);
# Save the image to your system and set its image format to Jpeg
$barCodeImageFormat = new BarCodeImageFormat();
$bb->save($dataDir . "barcode.jpg", $barCodeImageFormat->Jpeg);
# Display Status
print "Barcode with custom appearance saved as JPEG image successfully." . PHP_EOL;
}
