The gregoriantojd() function is a built-in function which converts a Gregorian date to a Julian Day Count. The function accepts three parameters in format $month / $day / $year, which represents the date in Gregorian calendar and converts it to a Julian Day count.
Syntax:
gregoriantojd( $month, $day, $year)
Parameters: The function accepts three mandatory parameters as shown above and described below:
- $month – This parameter specifies the month number in Gregorian calendar. The month number is in range 1-12 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 Gregorian calendar. The day number is in range 1-31 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 Gregorian calendar.
Return Value: The function returns the Gregorian date converted to a Julian Day count.
Examples:
Input : $month=3, $day=31, $year=2018 Output : 2458209 Input : $month=4, $day=27, $year=2018 Output : 2458236
Below program illustrate the gregoriantojd() function.
Program 1: The program below demonstrates the use of gregoriantojd() function.
<?php // PHP program to demonstrate the // use of gregoriantojd() function // converts date to julian integer $jd=gregoriantojd(4, 27, 2018); // prints the julian day integer echo ($jd); ?> |
Output:
2458236
Program 2: The program below demonstrates when day and month out of range.
<?php // PHP program to demonstrate the // use of gregoriantojd() function // converts date to julian integer // month is out of range $jd=gregoriantojd(4, 32, 2018); // prints the julian day integer echo ($jd), "\n"; // day is out of range $jd=gregoriantojd(13, 29, 2018); echo ($jd); ?> |
Output:
0 0
Reference:
http://php.net/manual/en/function.gregoriantojd.php
