Cannot read csv files that contain '<a href=' and do not have the extension ‘.csv’ ‘.tsv’.

[sinbino]

This is:

- [x] a bug report

I think the problem is similar to #564, but it happens under certain conditions, even in recent versions.
This can be a problem if getting a file from $_FILES['upfile']['tmp_name'] in php, since there is no extension.

What is the expected behavior?

• The file extension is not .csv and .tsv.
• It contains “<a href=”.

Can read csv files that satisfy all of the above.

What is the current behavior?

An error occurs when trying to read a csv file that satisfies all of the above.

Fatal error: Uncaught PhpOffice\PhpSpreadsheet\Reader\Exception: test is an Invalid Spreadsheet file. in /project/vendor/phpoffice/ phpspreadsheet/src/PhpSpreadsheet/Reader/Csv.php:288

What are the steps to reproduce?

index.php

<?php
require __DIR__ . '/vendor/autoload.php';

$spreadsheet = new \PhpOffice\PhpSpreadsheet\Reader\Csv();
$spreadsheet->load('test');

// test contains: 
// aaa,bbb,"<a href="

What features do you think are causing the issue

• Reader

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

csv

Which versions of PhpSpreadsheet and PHP are affected?

PhpSpreadsheet 1.29.0
php 8.1.2