What are the potential pitfalls of using a simple mathematical approach to calculate the time difference in PHP?

When using a simple mathematical approach to calculate time differences in PHP, one potential pitfall is not accounting for differences in time zones or daylight saving time. To solve this issue, it is recommended to use PHP's built-in DateTime class, which handles time zone conversions and daylight saving time automatically. 

$date1 = new DateTime('2022-01-01 12:00:00', new DateTimeZone('UTC'));
$date2 = new DateTime('2022-01-01 13:30:00', new DateTimeZone('UTC'));

$interval = $date1->diff($date2);

echo $interval->format('%H hours, %i minutes');

Keywords

date time timezone daylight saving strtotime

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