What are the potential pitfalls of subtracting year and month values to calculate the difference between two dates in PHP?

Subtracting year and month values to calculate the difference between two dates in PHP may not account for differences in the number of days between the dates. To accurately calculate the difference, it is recommended to use PHP's built-in date functions like `DateTime` and `DateInterval`. 

$date1 = new DateTime('2022-01-15');
$date2 = new DateTime('2021-12-10');

$interval = $date1->diff($date2);
echo $interval->format('%R%a days');

Keywords

date time calculation strtotime timezone

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