note 21562 deleted from function.easter-date by danbrown
| From: | danbrown@php.net | Date: | Sun, 20 Jul 2008 01:57:35 +0000 |
| Subject: | note 21562 deleted from function.easter-date by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-141927@lists.php.net to get a copy of this message | ||
Note Submitter: bigtree at 29a dot DONTSPAM dot nl
----
A much smaller hack is the following. I ported this from a Delphi implementation of a function
calculating easter dates.
<?php
function easter_date ($Year) {
/*
G is the Golden Number-1
H is 23-Epact (modulo 30)
I is the number of days from 21 March to the Paschal full moon
J is the weekday for the Paschal full moon (0=Sunday,
1=Monday, etc.)
L is the number of days from 21 March to the Sunday on or before
the Paschal full moon (a number between -6 and 28)
*/
$G = $Year % 19;
$C = (int)($Year / 100);
$H = (int)($C - ($C / 4) - ((8*$C+13) / 25) + 19*$G + 15) % 30;
$I = (int)$H - (int)($H / 28)*(1 - (int)($H / 28)*(int)(29 / ($H + 1))*((int)(21 - $G) /
11));
$J = ($Year + (int)($Year/4) + $I + 2 - $C + (int)($C/4)) % 7;
$L = $I - $J;
$m = 3 + (int)(($L + 40) / 44);
$d = $L + 28 - 31 * ((int)($m / 4));
$y = $Year;
$E = mktime(0,0,0, $m, $d, $y);
return $E;
}
?>