Create barcodes and QR codes using PHP and TCPDF

Barcodes and QR codes are important tools widely used in modern life. They are widely used in various fields such as logistics, retail, medical, payment, etc. This article will introduce how to create barcodes and QR codes using PHP and the TCPDF library.

1. What is TCPDF?

TCPDF is a PHP library for generating PDF documents. It's free, open source, and already widely used in many projects. In addition to generating PDF documents, TCPDF also provides the function of creating barcodes and QR codes.

2. How to install TCPDF?

Installing TCPDF is easy. You can install TCPDF by following the steps:

1. Download TCPDF: You can download the latest version of TCPDF from the TCPDF official website or GitHub.
2. Unzip TCPDF: Unzip the downloaded ZIP file into your website directory.
3. Introduce TCPDF: Introduce the TCPDF library into your PHP file.

require_once('tcpdf/tcpdf.php');
?>

Now, you have successfully installed the TCPDF library, Barcodes and QR codes can be created.

3. How to create a barcode?

TCPDF library provides many different types of barcodes, such as Code 39, Code 128, EAN-13, UPC-A, etc. Let's take a look at how to create a Code 39 barcode.

1. Create TCPDF object:

$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

2. Add page:

$pdf->AddPage();

3. Create Code 39 barcode:

$pdf ->write1DBarcode('TCPDF', 'C39', '', '', '', 18, 0.4, $style, 'N');

After executing the above code, you will get a Code 39 barcode. If you want to save the barcode to a file, you can use the following code:

$pdf->Output('barcode.pdf', 'D');

4. How to create QR code?

TCPDF library supports many different types of QR codes, such as QR code, PDF417, etc. Let's see how to create a QR code.

1. Create TCPDF object:

$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

2. Add page:

$pdf->AddPage();

3. Create QR code:

$pdf->write2DBarcode('TCPDF', 'QRCODE,H', '', '', 50, 50, $style, 'N');

After executing the above code, you will get a QR code. If you want to save the QR code to a file, you can use the following code:

$pdf->Output('qrcode.pdf', 'D');

5. How to customize barcodes and QR codes?

TCPDF library provides many options for you to customize barcodes and QR codes, such as size, color and font, etc.

1. Change size:

$pdf->write1DBarcode('TCPDF', 'C39', '', '', '', 30, 0.6, $ style, 'N');

$pdf->write2DBarcode('TCPDF', 'QRCODE,H', '', '', 100, 100, $style, 'N');

2. Change color:

$style = array(

'border' => true,
'vpadding' => 'auto',
'hpadding' => 'auto',
'fgcolor' => array(0,0,0),
'bgcolor' => false, 

);

$pdf->write1DBarcode('TCPDF', 'C39', '', '', '', 18, 0.4, $style, 'N');

$pdf->write2DBarcode('TCPDF', 'QRCODE,H', '' , '', 50, 50, $style, 'N');

3. Change font:

$pdf->SetFont('dejavusans', '' , 10);

$pdf->write1DBarcode('TCPDF', 'C39', '', '', '', 18, 0.4, $style, 'N');

$pdf->write2DBarcode('TCPDF', 'QRCODE,H', '', '', 50, 50, $style, 'N');

The above code sets the font to ' dejuvasans ' and set the size to 10. You can change the font and size to suit your needs.

6. Summary

It is very easy to create barcodes and QR codes using PHP and TCPDF library. All you need is simple code to create custom images. The TCPDF library is a powerful and easy-to-use library that has become very stable and reliable after years of development. If you need to create barcodes and QR codes in your projects, TCPDF library is your best choice.

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