Yii v2 snippet guide II

Comparing #15 with #16

Revision #16 was created by rackycz rackycz on Sep 8, 2020, 7:26:15 PM.

Composer and PhpExcel

Content

[...]
header('Content-Disposition: attachment;filename="filename.xlsx"');
$writer->save('hello_world.xlsx');
exit();
```

Thanks to [DbCreator](https://forum.yiiframework.com/t/yii2-phpoffice-phpspreadsheet-src-phpspreadsheet-shared-ole-pps-root-php-on-line-292-headers-already-sent/126617) for the latter approach. Other ways did not work for me.