Definition
The cal_to_jd() function converts a date in a specified calendar to Julian Day Count.
Syntax
cal_to_jd(calendar, month, day, year)
Parameters
| Parameter | Description |
|---|---|
calendar |
Required. Specifies the calendar to convert from. Must be one of the following values: CAL_GREGORIAN, CAL_JULIAN, CAL_JEWISH, CAL_FRENCH |
month |
Required. Specifies the month as a number. |
day |
Required. Specifies the day as a number. |
year |
Required. Specifies the year as a number. |
Example
<?php
$jd = cal_to_jd(CAL_GREGORIAN, 7, 1, 2021);
echo $jd;