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There are so many third party libraries or extensions that are available for generating/tracking barcodes.
Today I’m going to share with you that how we can easily add unique barcodes in our pdf using Magento default Zend library.
First, you have to create [Vendor Name]/[Module Name]/etc/di.xml in your existing module or create a new module and add the below code:
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<?xml version="1.0"?> <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd"> <type name="Magento\Sales\Model\Order\Pdf\Invoice"> <plugin name="barcodes_pdf_invoice" type="[Vendor Name]\[Module Name]\Plugin\Invoice" sortOrder="10" /> </type> </config> |
Then you have to create a plugin file [Vendor Name]\[Module Name]\Plugin\Invoice.php and add the below code:
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<?php namespace [Vendor Name]\[Module Name]\Plugin; use Magento\Framework\App\Config\ScopeConfigInterface; class Invoice { /** * Configuration barcode enable XML path */ const XML_PATH_BARCODES_ENABLED = 'barcodes/general/eb_barcodes_active'; /** * @var ScopeConfigInterface */ private $scopeConfig; public function __construct( ScopeConfigInterface $scopeConfig ) { $this->scopeConfig = $scopeConfig; } public function beforeInsertDocumentNumber($subject, $page, $text) { if ($this->scopeConfig->isSetFlag(self::XML_PATH_BARCODES_ENABLED)) { //Here you will check your custom condition like enable/disable $docHeader = $subject->getDocHeaderCoordinates(); $image = $this->generateBarcode($text); $page->drawImage($image, $docHeader[2] - 150, $docHeader[1] + 5, $docHeader[2] + 8, $docHeader[1] +50); //You will adjust barcode image place or height/width as per your requirement } } protected function generateBarcode($text) { $config = new \Zend_Config([ 'barcode' => 'code128', 'barcodeParams' => [ 'text' => $this->extractInvoiceNumber($text), 'drawText' => true ], 'renderer' => 'image', 'rendererParams' => ['imageType' => 'png'] ]); $barcodeResource = \Zend\Barcode\Barcode::factory($config)->draw(); ob_start(); imagepng($barcodeResource); $barcodeImage = ob_get_clean(); $image = new \Zend_Pdf_Resource_Image_Png('data:image/png;base64,' . base64_encode($barcodeImage)); return $image; } protected function extractInvoiceNumber($text) { $array_of_words = explode("#", $text); return $array_of_words[1]; } } |
After creating both files run php bin/magento cache:flush and see any invoice pdf barcodes are printed as below.
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