Are there any specific PHP functions or methods recommended for handling date calculations?

When working with date calculations in PHP, it is recommended to use the DateTime class and its methods for accurate and reliable date manipulation. This class provides a wide range of functionalities for working with dates, such as adding or subtracting days, months, or years, comparing dates, formatting dates, and more.

// Example of using DateTime class for date calculations
$date = new DateTime('2022-01-15');
$date->modify('+1 week'); // Add 1 week to the date
echo $date->format('Y-m-d'); // Output: 2022-01-22