Finding the number of days between two dates

Question

How to find number of days between two dates using PHP?

Answer 1

Looking all answers I compose universal function what working on all PHP versions.

if(!function_exists('date_between')) :
    function date_between($date_start, $date_end)
    {
        if(!$date_start || !$date_end) return 0;

        if( class_exists('DateTime') )
        {
            $date_start = new DateTime( $date_start );
            $date_end   = new DateTime( $date_end );
            return $date_end->diff($date_start)->format('%a');
        }
        else
        {           
            return abs( round( ( strtotime($date_start) - strtotime($date_end) ) / 86400 ) );
        }
    }
endif;

In the general, I use 'DateTime' to find days between 2 dates. But if in the some reason, some server setup not have 'DateTime' enabled, it will use simple (but not safe) calculation with 'strtotime()'.