Yii v2 snippet guide II

Comparing #25 with #26

Revision #26 was created by rackycz rackycz on Sep 9, 2020, 9:51:40 AM.

Composer and PhpExcel

Content

[...]
header('Cache-Control: max-age=0');
$writer->save('php://output');
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 idea how to send XLSX to the browser. Nevertheless exit() or die() should not be called. Read the link.

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

```php
ob_start();
[...]