note 88468 deleted from function.gregoriantojd by danbrown

Note Submitter: swiles at ddbc dot edu dot tw ---- The php gregoriantojd() and jdtogregorian() functions, in addition to the limitations noted by httpwebwitch, does not take account of the 'Astronomical' system of reckoning - i.e. using a year zero, instead of going directly from 1BCE to 1CE, as with the Christian Anno Domini system. These functions can be used to wrap the php built-ins to return ISO 8601 compliant dates: <?php function ISO8601toJD($ceDate) { list($day, $month, $year) = array_map('strrev',explode('-', strrev($ceDate), 3)); if ($year <= 0) $year--; return gregoriantojd($month, $day, $year); } function JDtoISO8601($JD) { if ($JD <= 1721425) $JD += 365; list($month, $day, $year) = explode('/', jdtogregorian($JD)); return sprintf('%+05d-%02d-%02d', $year, $month, $day); } ?>