Question

To create a DateTime object that represents a due date that's 90 days after the current date, you use the following code:

Answer 1

If $due_date contains a DateTime object, $due_date_diff will contain  

c. a DateInterval object

Explanation:

• The DateInterval class ¶  represents a date interval.
• A date interval stores either a fixed amount of time (in years, months, days, hours etc) or a relative time string in the format that DateTime's constructor supports.
• The diff method is just as easy to use, but provides an extra piece of information: total days. This is important because when using the DateTime object to find a difference, we have a source and destination date, and therefore we can reduce the units of time into larger denominations. However, having the total number of days in between is a valuable piece of information.
• The PHP DateTime class has three methods that work with a DateInterval object:

1. add
2. sub
3. diff

Properties

• y  :Number of years.
• m  :Number of months.
• d  :Number of days.
• h  :Number of hours.
• i  :Number of minutes.
• s  :Number of seconds.