Generate Barcode in php

Create a controller Barcode.php and paste the below code

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Barcode extends CI_Controller {

public function index()
{
//I'm just using rand() function for data example
$data=[];
$code = rand(10000, 99999);

//load library
$this->load->library('zend');
//load in folder Zend
$this->zend->load('Zend/Barcode');
//generate barcode
$imageResource = Zend_Barcode::factory('code128', 'image', array('text'=>$code), array())->draw();
imagepng($imageResource, 'barcodes/'.$code.'.png');

$data['barcode'] = 'barcodes/'.$code.'.png';
$this->load->view('welcome',$data);
}


}

<div>
<img src="<?php echo $barcode; ?>">
</div>

Generate a random number of barcode

load zend library

Zend_barcode uses a factory method with five arguments which will create an instance of a renderer that extends Zend_Barcode_Renderer_Renderer Abstract. The arguments are:

The name of barcode format (e.g., "code39", "code128") (mandatory)

The name of renderer ("image")

Options to pass to the barcode object (an array or Zend_Config object) (optional)

Options to pass to the renderer object (an array or Zend_Config object) (optional)

Boolean to indicate whether or not to automatically render errors. (optional default TRUE)

store the image in barcodes folder

load view page with the generated image name

imagepng() will Output a PNG image to either the browser or a file

public function barcode_generate($patient_test_id,$patient_id,$val)
{
// header('Content-Type: image/png');
$code = $patient_test_id.$patient_id.$val;
// $barcode_image = 'barcode-'.date('Ymd').time().'.png';
$barcode_image = $patient_test_id.$patient_id.$val.'.png';
$url = './assets/barcode/'.$barcode_image;
$this->load->library('zend');
$this->zend->load('Zend/Barcode');
//$imagebarcode = Zend_Barcode::render('code128', 'image', array('text'=>$code), array())->draw();
//$imagebarcode = Zend_Barcode::factory('code128', 'image', array('text'=>$code), array())->draw();
$imagebarcode = Zend_Barcode::draw('code39', 'image', array('text' => $code, 'barheight'=>18, 'factor'=>1), array());
$store_image = imagepng($imagebarcode, $url);
//$store_image = imagepng($imagebarcode,"/assets/barcode/".$barcode_image);
$result = $barcode_image;
return $result;


// $barcode = Zend_Barcode::factory('code128', 'image', array('text' => $code, 'barHeight'=>30, 'factor'=>2), array('imageType' => 'png'));
}

https://framework.zend.com/manual/1.12/en/zend.barcode.creation.html#zend.barcode.creation.drawing

https://qawall.in/generate-qr-code-using-codeigniter/