The cal_to_jd() function is an inbuilt function in PHP which is used to converts a specified date into Julian Day Count. The cal_to_jd() function calculates the Julian day count for a date in the specified calendar. This function supports CAL_GREGORIAN, CAL_JULIAN, CAL_JEWISH and CAL_FRENCH calendars.
Syntax:
int cal_to_jd( $calendar, $month, $day, $year )
Parameters: This function accepts four parameters as mentioned above and described below:
- $calendar: It is used to specify the calendar for calculation. The calendar values are Gregorian calendar, French calendar, Jewish calendar and Julian calendar.
- $month: It is used to specify the Month in the selected calendar.
- $day: It is used to specify the Day in the selected calendar.
- $year : It is used to specify the year in the selected calendar.
Return Value: This function returns a Julian Day number.
Below programs illustrate the cal_to_jd() function in PHP.
Program 1:
php
<?php // Converts a Gregorian calendar Date // into Julian Day number.$date = cal_to_jd(CAL_GREGORIAN, 11, 03, 2007);// Prints the conversion of date to // Julian Day number.echo $date;?> |
Output:
2454408
Program 2:
php
<?php// Converts Julian calendar Date into // Julian Day count.$date = cal_to_jd(CAL_JULIAN, 7, 20, 20017);// Prints the above conversion.echo $date;?> |
Output:
9032468
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