What are the advantages of using DateTime objects compared to timestamps for date calculations in PHP?

When working with date calculations in PHP, using DateTime objects is advantageous compared to timestamps because DateTime objects provide a more object-oriented approach to working with dates. They offer a wide range of methods for manipulating dates, formatting them, and comparing them. This makes date calculations more intuitive and easier to manage compared to using timestamps directly.

// Using DateTime objects for date calculations
$date1 = new DateTime('2022-01-01');
$date2 = new DateTime('2022-01-10');

// Calculate difference in days
$interval = $date1->diff($date2);
echo $interval->days; // Output: 9

// Add 1 month to a date
$date1->modify('+1 month');
echo $date1->format('Y-m-d'); // Output: 2022-02-01