How can PHP developers ensure accurate date calculations when using date_diff?

When using the date_diff function in PHP, developers can ensure accurate date calculations by making sure to provide the dates in the correct order and format. It's important to use the DateTime objects for the dates being compared and to pay attention to the interval format being returned by date_diff. 

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

$interval = date_diff($date1, $date2);

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

Keywords

PHP date_diff date calculations accuracy datetime

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