In PhpSpreadsheet Release 1, if the LoadSheetsOnly option was specified, and no sheets matched, a new blank sheet was created. This behavior changed in PhpSpreadsheet Release 2, so that an exception wound up being thrown instead. Although the Release 2 approach seems more sensible to me, it was actually collateral damage from a different change, and was not an intentional result.
The difference in behavior is causing a problem for Laravel-Excel. In particular, a PR which would move their supported PhpSpreadsheet release from 1 to 5, is delayed because this change in behavior breaks part of their test suite. See https://github.com/SpartnerNL/Laravel-Excel/pull/4302. We would very much like them to get off release 1. I volunteered to add a compatibility option to the Readers which would emulate the release 1 behavior. The result is this PR.
Usage:
```php
$reader = new \PhpOffice\PhpSpreadsheet\Reader\Xlsx();
$reader->setLoadSheetsOnly([list of sheet names]);
if (method_exists($reader, 'setCreateBlankSheetIfNoneRead')) {
$reader->setCreateBlankSheetIfNoneRead(true);
}
```
In addition to Xlsx Reader, the method is available for Xls, Ods, Xml, and Gnumeric.
oleibman