DateTime modify function backward compatibility break on 8.2

[pkusmierczyk]

Description

The following code:

<?php
$modifiedDate = (new DateTime('2023-01-17'))->modify(sprintf('+%s days', $days))->format('Y-m-d');

Resulted in this output:
For values of $days lower than 0 results are incorrect (according to version 8.1). If value is -1 we get

'2023-01-18'

But I expected this output instead:

'2023-01-16'

PHP Version

8.2

Operating System

Ubuntu 20.04

[pospjan]

@pkusmierczyk I think that would be the same as here #9950, so it is documented BC (via php/doc-en@ef51b1c) "number symbols in relative formats no longer accept multiple signs, e.g. +-2"

[pkusmierczyk]

Yes, its the same, I couldn't find anything similar before so I have created a new issue