Undocumented behaviour difference between php7.4 and php8.2

[atm-florianm]

From manual page: https://php.net/function.strtotime

[edit] My bad, I found this page where the change is, in fact, documented. However, the page is not easy to find. I think there should be a warning when an incorrect number format is used.

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I noticed the following difference in output for the same code between php7.4 and php8.2:

echo date('Y', strtotime('+-1 year', time()));
// php7.4: 2023
// php8.2: 2025

I didn't find this difference documented anywhere.

Maybe +- should be discouraged with a warning ?

Versions used for this comparison:

PHP 7.4.3-4ubuntu2.19 (cli) (built: Jun 27 2023 15:49:59) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.3-4ubuntu2.19, Copyright (c), by Zend Technologies

PHP 8.2.15 (cli) (built: Jan 20 2024 14:16:39) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.2.15, Copyright (c) Zend Technologies
    with Zend OPcache v8.2.15, Copyright (c), by Zend Technologies
    with Xdebug v3.3.1, Copyright (c) 2002-2023, by Derick Rethans