How can PHP handle leap years and time changes when calculating date differences?

When calculating date differences in PHP, it is important to consider leap years and time changes such as daylight saving time. To handle leap years, you can use the built-in PHP function `date_create` to create DateTime objects for the start and end dates, then use the `diff` method to calculate the difference. To handle time changes, you can set the timezone for the DateTime objects to ensure accurate calculations. 

$start_date = date_create('2022-02-28');
$end_date = date_create('2023-03-01');

$interval = $start_date->diff($end_date);

echo $interval->format('%a days');

Keywords

PHP leap years time changes date differences date calculations

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