PHP barcode generation package class

// Reference the class corresponding to the class folder
require_once('class/BCGFontFile.php');
require_once('class/BCGColor.php');
require_once('class/BCGDrawing. php');

// Barcode encoding format
require_once('class/BCGcode39.barcode.php');

// Load font size
$font = new BCGFontFile('./class/font/Arial.ttf ', 18);

//Color barcode
$color_black = new BCGColor(0, 0, 0);
$color_white = new BCGColor(255, 255, 255);

$drawException = null;
try {
 $code = new BCGcode39();
 $code->setScale(2);
 $code->setThickness(30); // Barcode thickness
 $code->setForegroundColor($color_black); // Barcode Color
 $code->setBackgroundColor($color_white); // Blank gap color
 $code->setFont($font); //
 $code->parse('HELLO'); // Required for barcode Data content
} catch(Exception $exception) {
 $drawException = $exception;
}

//Draw the barcode according to the above conditions
$drawing = new BCGDrawing('', $color_white);
if($drawException) {
 $drawing->drawException($drawException);
} else {
 $drawing->setBarcode($code);
 $drawing->draw();
}

// Generate pictures in PNG format
 header('Content-Type: image/png');


$drawing->finish(BCGDrawing::IMG_FORMAT_PNG);
?>

PHP