note 88468 added to function.gregoriantojd

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: 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); } ---- Server IP: 140.113.54.119 Probable Submitter: 125.232.128.152 ---- Manual Page -- http://www.php.net/manual/en/function.gregoriantojd.php Edit -- https://master.php.net/note/edit/88468 Del: integrated -- https://master.php.net/note/delete/88468/integrated Del: useless -- https://master.php.net/note/delete/88468/useless Del: bad code -- https://master.php.net/note/delete/88468/bad+code Del: spam -- https://master.php.net/note/delete/88468/spam Del: non-english -- https://master.php.net/note/delete/88468/non-english Del: in docs -- https://master.php.net/note/delete/88468/in+docs Del: other reasons-- https://master.php.net/note/delete/88468 Reject -- https://master.php.net/note/reject/88468 Search -- https://master.php.net/manage/user-notes.php