Yii v2 snippet guide II

Comparing #21 with #22

Revision #22 was created by rackycz on Sep 8, 2020, 7:42:10 PM.

Composer and PhpExcel

Content

[...]

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.

Following is my idea which originates infrom method renderPhpFile() from Yii2:

```php
ob_start();
ob_implicit_flush(false);
$writer->save('php://output');

[...]