In the context of PHP scripting, what are some best practices for accurately representing and manipulating time intervals in code?

When representing and manipulating time intervals in PHP, it is best to use the DateTime class along with DateInterval class. This allows for accurate calculations and formatting of time intervals. Additionally, using predefined constants for time units (such as DAY, HOUR, MINUTE) can make the code more readable and maintainable.

// Create DateTime objects for start and end times
$start = new DateTime('2022-01-01 00:00:00');
$end = new DateTime('2022-01-02 12:00:00');

// Calculate the interval between the two dates
$interval = $start->diff($end);

// Output the interval in a human-readable format
echo $interval->format('%d days %h hours %i minutes');