Description:
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Hello!

In case of strtotime is used with '+- <date/time-string>' the output differs with PHP8.2 compared to PHP8.1 

In my opionion - depending on the usage and codebase - this COULD be a security risk, thats why i am posting this here and not in the public bug tracker in github. 

Test script:
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<?php

$foo = strtotime('+-2 hours');
$bar = strtotime('-2 hours');

echo '+-2 hours equals -2 hours = ' . ($foo === $bar ? 'yes' : 'no') . PHP_EOL;



Expected result:
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OUTPUT with PHP8.1: +-2 hours equals -2 hours = yes

Actual result:
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OUTPUT with PHP8.2: +-2 hours equals -2 hours = no