Can mktime be used to calculate the difference in seconds between two dates in PHP?

To calculate the difference in seconds between two dates in PHP, you can use the mktime function to convert the dates to Unix timestamps and then subtract one timestamp from the other. This will give you the difference in seconds between the two dates.

$date1 = mktime(0, 0, 0, 1, 1, 2022); // first date
$date2 = mktime(0, 0, 0, 1, 1, 2023); // second date

$diff_seconds = $date2 - $date1;
echo "Difference in seconds: " . $diff_seconds;