The frenchtojd() function is a built-in function which converts a French date to a Julian Day Count. The function accepts three parameters in format $month / $day / $year, which represents the date in French republican calendar and converts it to a Julian Day count.
Syntax:
frenchtojd( $month, $day, $year)
Parameters: The function accepts three mandatory parameters as shown above and described below:
- $month – This parameter specifies the month number in French calendar. The month number is in range 1-13 inclusive. If a month number in excess of 12 or less than 0 is passed, the Julian day is returned as 0.
- $day – This parameter specifies the day in French calendar. The day number is in range 1-30 inclusive. If a day number in excess of 31 or less than 0 is passed, the Julian day is returned as 0. Leap years are not taken into consideration
- $year – This parameter specifies the year in French calendar. The year number is in range 1-14 inclusive. If a year number in excess of 14 or less than 1 is passed, the Julian day is returned as 0. Leap years are not taken into consideration
Return Value: The function returns the French date converted to a Julian Day count.
Examples:
Input : $month=3, $day=11, $year=12 Output : 2379928 Input : $month=4, $day=8, $year=13 Output : 2380320
Below program illustrate the frenchtojd() function.
Program 1: The program below demonstrates the use of frenchtojd() function.
<?php // PHP program to demonstrate the // use of frenchtojd() function   // converts date to julian integer $jd=frenchtojd(4, 8, 13);   // prints the julian day integer echo ($jd); ?> |
Output:
2380320
Program 2: The program below demonstrates when day and month out of range.
<?php // PHP program to demonstrate the // use of frenchtojd() function   // converts date to julian integer // month is out of range $jd=frenchtojd(22, 8, 11);   // prints the julian day integer echo ($jd), "\n";     // day is out of range $jd=frenchtojd(4, 32, 11); echo ($jd); ?> |
Output:
0 0
