cal_to_jd

Converts from a supported calendar to Julian Day Count

Syntax

cal_to_jd(int $calendar, int $month, int $day, int $year) : int

calendar

Calendar to convert from

Number	Constant	Description
0	CAL_GREGORIAN	Gregorian Calendar
1	CAL_JULIAN	Julian Calendar
2	CAL_JEWISH	Jewish Calendar
3	CAL_FRENCH	French Revolutionary Calendar

month

The month as a number, the valid range depends on the calendar

day

The day as a number, the valid range depends on the calendar

year

The year as a number, the valid range depends on the calendar

A Julian Day number.

<?

$calendar = CAL_GREGORIAN;
$month = 1;
$day = 1;
$year = 1;

$return = cal_to_jd($calendar, $month, $day, $year);

echo $return;

?>

<?

$calendar = CAL_JULIAN;
$month = 1;
$day = 1;
$year = 1;

$return = cal_to_jd($calendar, $month, $day, $year);

echo $return;

?>

<?

$calendar = CAL_JEWISH;
$month = 1;
$day = 1;
$year = 1;

$return = cal_to_jd($calendar, $month, $day, $year);

echo $return;

?>

<?

$calendar = CAL_FRENCH;
$month = 1;
$day = 1;
$year = 1;

$return = cal_to_jd($calendar, $month, $day, $year);

echo $return;

?>