Box/Spout questions - php

Question

This is my first time using Box/Spout library. I am using WAMP server.
My question is the following:
require_once('./spout-master/src/Spout/Autoloader/autoload.php');
use Box\Spout\Writer\WriterFactory;
use Box\Spout\Common\Type;
$filePath = 'test.xlsx';
$writer = WriterFactory::create(Type::XLSX);
$writer->openToFile($filePath);
[X]
$writer->addRow(['a'], $style);
$writer->close();
(1)
When I am running above code, I get the following error message:
Warning: rmdir(C:\WINDOWS\TEMP/xlsx560f58d588ceb): Permission denied in
C:\wamp\www\1300.revenue.com.my\public_html\spoutmaster\src\Spout\Common\Helper\FileSystemHelper.php on line 113
What is the errors means and how should I modify it to prevent this error message appeared?
(2) I want to make expected output like below:
But I didn't know how to write it on [X] part. How to write it in order to get the expected output?

Answer 1

It looks like the default temp folder used to generate the XLSX file cannot be deleted. You can verify it by checking the permissions on C:\WINDOWS\TEMP/xlsx560f58d588ceb.
To solve this issue, you can either manually fix the permissions on the temp folder (C:\WINDOWS\TEMP) or use another temporary folder, as specified here: https://github.com/box/spout#using-custom-temporary-folder
Regarding 2), there is no straightforward way to do this whith Spout. Spout does not support merging cells. The only thing you can do is:
| 1 | 2 | | 3 | |
|---|---|---|---|---|
| | A | B | A | B |
|---|---|---|---|---|
Or alternatively (if that makes more sense):
| 1 | 2 | 2 | 3 | 3 |
|---|---|---|---|---|
| 1 | A | B | A | B |
|---|---|---|---|---|
Either way, you'll have to format the rows as shown above: [[1,2,'',3',''], ['', 'A','B','A','B']] or [[1,2,2,3,3], [1, 'A','B','A','B']]