View difference between Paste ID: TEgBQf0f and t6TmxysK

 <?php
 
 class Controller extends CI_Controller
 {
 
 	function __construct()
 	{
 		parent::__construct();
 	}
 
 	function index()
 	{
 		$this->load->view('view');
 	}
 
 	function generateQr()
 	{
 		$string = $this->input->post('string');
 
 		$this->load->library('ciqrcode'); // pemanggilan library
 
 		$config['cacheable']	= true; // boolean, defaultnya true
 		$config['cachedir']		= './assets/'; //string, the default is application/cache/
 		$config['errorlog']		= './assets/'; //string, the default is application/logs/
 		$config['imagedir']		= './assets/images/'; // direktori penyimpanan qr code
 		$config['quality']		= true; // boolean, defaultnya true
 		$config['size']			= 1024; // integer, defaultnya 1024;
 		$config['black']		= array(224, 255, 255); // array, defaultnya array(255, 255, 255)
 		$config['white']		= array(70, 130, 180); // array, defaultnya array(0, 0, 0);
 		$this->ciqrcode->initialize($config);
 
 		$image_name = $string.'.png'; // pembuatan nama qr code
 
 		$params['data']		= $string;
 		$params['level']	= 'L';
 		$params['size']		= 10;
 		$params['savename']	= FCPATH.$config['imagedir'].$image_name;
 		$qr = $this->ciqrcode->generate($params);
 		sleep(3);
-		$this->print_receipt($image_name);
+		if(is_file(FCPATH.$config['imagedir'].$image_name))
 		{
 			$this->print_receipt($image_name);
 		}
 		else
 		{
 			die('image:'.FCPATH.$config['imagedir'].$image_name."| not found");
 
-		require(FCPATH.'/vendor/autoload.php');
+		}
 		redirect('');
 	}
 
 	function print_receipt($string)
 	{
 		// load library
 		require_once(FCPATH.'/vendor/autoload.php');
 
 		// membuat connector printer ke shared printer bernama "printer_a" (yang telah disetting sebelumnya)
 		/**
 		 * cara setting printer:
 		 * 1. masuk ke control panel -> devices and printers
 		 * 2. klik kanan printer, pilih "Set as Default Printer"
 		 * 3. klik kanan printer, pilih "Printer properties"
 		 * 4. pilih tab "Sharing"
 		 * 5. centang checkbox "Share this printer"
 		 * 6. isi nama di kolom "Share name". Share name ini akan digunakan sebagai parameter connector
 		 * 7. klik apply/OK
 		 * */
         $connector = new Mike42\Escpos\PrintConnectors\WindowsPrintConnector("printer_a");
 
         // membuat objek $printer agar dapat di lakukan fungsinya
-        $tux = Mike42\Escpos\EscposImage::load(base_url().'assets/images/'.$string, false);
+
 
         $printer->initialize();
         $printer->text("QR CODE");
         $printer->text("\n");
 
         $printer->initialize();
         $tux = Mike42\Escpos\EscposImage::load(FCPATH.$config['imagedir'].$image_name);
 //base_url().'assets/images/'.$string, false);
         $printer->bitImageColumnFormat($tux, Mike42\Escpos\Printer::IMG_DOUBLE_WIDTH || Mike42\Escpos\Printer::IMG_DOUBLE_HEIGHT);
         $printer->text("\n");
 
         $printer->feed(2); // mencetak 2 baris kosong, agar kertas terangkat ke atas
         $printer->cut();
 
         $printer->close();
 	}
 }