What are common pitfalls when subtracting dates in PHP?

Common pitfalls when subtracting dates in PHP include not converting dates to a format that can be easily subtracted, not accounting for time zones, and not handling leap years or daylight saving time changes. To avoid these issues, it is important to use the DateTime class in PHP, which provides methods for accurate date calculations. 

$date1 = new DateTime('2022-01-01');
$date2 = new DateTime('2021-01-01');
$interval = $date1->diff($date2);
echo $interval->format('%R%a days');

Keywords

DateTime date subtraction date_diff date calculations timezone issues

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