This article explains the PHP function unixtojd, which converts a given Unix timestamp into its corresponding Julian Day number, returning the current day's count when no timestamp is supplied, and details its parameter and return value.
JewishToJD is a PHP function that converts a given Jewish calendar date—specified by month (1‑13), day (1‑30), and year (1‑9999)—into its corresponding Julian Day count, noting that while it can handle years before 3761 B.C., such calculations are historically meaningless.
The JDToGregorian function takes an integer representing a Julian Day number and returns the corresponding Gregorian calendar date formatted as month/day/year, providing a simple PHP utility for converting Julian dates to the standard Gregorian format.
This article presents a PHP function named jdtofrench that accepts an integer Julian Day count and returns the corresponding date formatted as month/day/year in the French Republican calendar, detailing its parameter and return value for backend developers.
This article explains the PHP gregoriantojd function, detailing its purpose of converting Gregorian calendar dates within the range 4714 B.C. to 9999 A.D. into Julian Day numbers, and describes its parameters, valid ranges, historical context, and return value.
The cal_to_jd() function in PHP calculates the Julian Day count from a given date, supporting Gregorian, Julian, Jewish, and French calendars, and returns the corresponding Julian Day number based on the provided calendar, month, day, and year parameters.
