Error in part of the content in the book...

[Cleverscript]

What is the expected behavior?

Numeric data cells are missing extra characters

What is the current behavior?

Why for numeric values ​​in cells, the first character before this number, is added a single quote. This leads to an error in Microsoft Excel. I added a condition that if the value = is_numeric, then we set DataType::TYPE_NUMERIC for setValueExplicit. But there are numbers in the form of a date 04.09.2024 or such as 47.91.2 and this did not work with them ... How to solve the problem with them if TYPE_NUMERIC for them leads to a Fatal error ?

What are the steps to reproduce?

->setValueExplicit('04.09.2024', DataType::TYPE_STRING);

Please provide a Minimal, Complete, and Verifiable example of code that exhibits the issue without relying on an external Excel file or a web server:

<?php

->setValueExplicit('04.09.2024', DataType::TYPE_STRING);

If this is an issue with reading a specific spreadsheet file, then it may be appropriate to provide a sample file that demonstrates the problem; but please keep it as small as possible, and sanitize any confidential information before uploading.

What features do you think are causing the issue

• Writer

Does an issue affect all spreadsheet file formats? If not, which formats are affected?

Xlsx

Which versions of PhpSpreadsheet and PHP are affected?

<=1.28

report_2024-11-27.xlsx

[oleibman]

I am not sure what you are asking. 5 can be interpreted as a number or as a string, which is why you can add the leading apostrophe to make Excel treat it as a string. However, 04.09.2024 and 47.91.2 are unambiguously strings, not numbers - you can't set their type to numeric because they aren't. There are ways for you to get Excel and PhpSpreadsheet to treat the first as a date, e.g. =DATE(2024, 4, 9).