PHP Countdown Timer: Show the time that remains until a given date

This class can display the time that remains until a given date.

It takes an array of parameters that define the initial and final dates, and the format of the output of the time from the initial to the final date.

The class computes the difference between the dates and returns a string with either the number of remaining days, a timer with the remaining years, months, days, hours, minutes and seconds, or in a raw format.

What is the best PHP timer countdown class?
I need a php class that will countdown to 24 hours after a given