Hour Difference between 2 dates in Zend

i am using zend framework and i want to know the hour difference between 2 dates. I know how to do it in core php using strtotime开发者_运维问答.

But i want it in Zend, if at all possible.

Ex: These are my dates in datetime format:

2011-04-13 23:00:00

2011-04-14 15:45:00

It seems there is a sub() method in Zend_Date :

sub($date, $part = null, $locale = null)
Subtracts the $part of $date having a locale $locale from the current object's date.

Using Zend_Date::HOUR as $part should do the trick, I suppose :

$num_month = $firstDate->sub($secondDate, Zend_Date::HOUR);

As a sidenote : when working with strtotime(), dates are reprensented using UNIX Timestamps -- which can only go from 1970 to 2038 (on 32 bits systems, at least)

It would probably wiser to work with the DateTime class, which allows one to manipulate a (virtually) unlimited range of dates.

Why you want to have such function in Zend when you can do this thing with core PHP?

Just use core PHP.

Thanks, i could achieve a solution this way:

$firstDay = new Zend_Date('2011-04-13 23:00:00', 'YYYY-MM-DD h:i:s');

$lastDay = new Zend_Date('2011-04-14 15:45:00', 'YYYY-MM-DD h:i:s');

$diff = $lastDay->sub($firstDay)->toValue();

$days = ceil($diff/60/60);

Finally i could get the ceil value of 17, but could not get the exact difference (16h, 45min)