PHP Function to calculate days difference between given 2 dates.

Here is a simple  Function to calculate days difference between given 2 dates.

function daysDifference($endDate, $beginDate)

{

              //explode the date by "-" and storing to array

             $date_parts1=explode("-", $beginDate);

             $date_parts2=explode("-", $endDate);

             //gregoriantojd() Converts a Gregorian date to Julian Day Count

            $start_date=gregoriantojd($date_parts1[1], $date_parts1[2], $date_parts1[0]);

             $end_date=gregoriantojd($date_parts2[1], $date_parts2[2], $date_parts2[0]);

             return $end_date - $start_date;

}