upgrade code demo

Author: giauphan

README.md

@@ -50,9 +50,13 @@
  ```php
  <?php
 
- Route::get('qr-code', function () 
- {
- return QRCode::text('QR Code Generator for Laravel!')->png(); 
+ Route::get('qr-code', function () {
+ $path = public_path().'/qr-code.png';
+ $filename = '/qr-code.png';
+ QRCode::text('QR Code Generator for Laravel!')
+ ->setOutfile($path )
+ ->png();
+ return '<img src=' . $filename . '>';
  });
 
  ```