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(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
cal_to_jd — Converts from a supported calendar to Julian Day Count
cal_to_jd() calculates the Julian day count
for a date in the specified calendar
.
Supported calendar
s are
CAL_GREGORIAN
,
CAL_JULIAN
,
CAL_JEWISH
and
CAL_FRENCH
.
calendar
Calendar to convert from, one of
CAL_GREGORIAN
,
CAL_JULIAN
,
CAL_JEWISH
or
CAL_FRENCH
.
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.