easter_days
(PHP 4, PHP 5, PHP 7, PHP 8)
easter_days — 得到指定年份的3月21日到复活节之间的天数
说明
easter_days(int
$year
= ?, int $method
= CAL_EASTER_DEFAULT): int返回指定年份的3月21日到复活节之间的天数,如果没有指定年份,默认是当年。
这个函数可以用来代替easter_date()函数来计算Unix时间戳以外年份的复活节日期。(比如1970年以前或2037年以后)
复活节的日期是由尼西亚议会在AD325年确定的为每年春分月圆后的第一个星期日。春分一般是在3月21日,这就简化为只要计算满月的日期和紧挨的星期日的日期。这里所用的算法是在532年由Dionysius Exiguus所介绍的,参考了Julian历法和Gregorian历法这两个历法来提高精确度。(在1753年以前用Julian历法计算,该历法是一个以19年为周期来确定月亮的相位的历法。在1753年以后用Gregorian历法计算,该历法由Clavius和Lilius发明,由Pope Gregory 8世在1582年推广)
参数
-
year
-
正数形式的年份
-
method
-
当设置为
CAL_EASTER_ROMAN
时可以用Gregorian历法来计算1582-1752之间的复活节日期。更多可用的常量参考calendar constants。
返回值
根据给定参数year
年份而返回的3月21日至复活节的天数。
更新日志
版本 | 说明 |
---|---|
Since 4.3.0 |
参数year 可选,缺省默认值是当年。
|
Since 4.3.0 |
引入参数 method 。
|
范例
示例 #1 easter_days() example
<?php
echo easter_days(1999); // 14, i.e. April 4
echo easter_days(1492); // 32, i.e. April 22
echo easter_days(1913); // 2, i.e. March 23
?>
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User Contributed Notes 2 notes
p dot rijt at caesar dot nl ¶
7 years ago
This function returns an array of timestamp corresponding to Dutch National holidays. Liberation Day (Bevrijdingsdag) is added as a National holiday once every five years (2000, 2005, 2010, ...).
<?php
function getHolidays($year = null) {
if ($year === null) {
$year = intval(date('Y'));
}
$easterDate = easter_date($year);
$easterDay = date('j', $easterDate);
$easterMonth = date('n', $easterDate);
$easterYear = date('Y', $easterDate);
$holidays = array(
// Nieuwjaarsdag
mktime(0, 0, 0, 1, 1, $year),
// 1e Kerstdag
mktime(0, 0, 0, 12, 25, $year),
// 2e Kerstdag
mktime(0, 0, 0, 12, 26, $year)
);
// Bevrijdingsdag
if (($year % 5) == 0) {
$holidays[] = mktime(0, 0, 0, 5, 5, $year);
}
// Koninginnedag (< 2014) of Koningsdag (>= 2014).
// Verplaats naar zaterdag als het valt op zondag.
if ($year <= 2013) { // Koninginnedag <= 2013
if (date('w', mktime(0, 0, 0, 4, 30, $year)) == 0) { // Op zondag?
$holidays[] = mktime(0, 0, 0, 4, 29, $year); // Verplaats naar zaterdag
} else {
$holidays[] = mktime(0, 0, 0, 4, 30, $year); // Koninginnedag
}
} else { // Koningsdag > 2014
if (date('w', mktime(0, 0, 0, 4, 27, $year)) == 0) { // Op zondag?
$holidays[] = mktime(0, 0, 0, 4, 26, $year); // Verplaats naar zaterdag
} else {
$holidays[] = mktime(0, 0, 0, 4, 27, $year); // Koningsdag
}
}
// Onderstaande dagen hebben een datum afhankelijk van Pasen
// Goede Vrijdag (= pasen - 2)
$holidays[] = strtotime('-2 days', mktime(0, 0, 0, $easterMonth, $easterDay, $easterYear));
// 1e Paasdag
$holidays[] = mktime(0, 0, 0, $easterMonth, $easterDay, $easterYear);
// 2e Paasdag (= pasen +1)
$holidays[] = strtotime('+1 days', mktime(0, 0, 0, $easterMonth, $easterDay, $easterYear));
// Hemelvaartsdag (= pasen + 39)
$holidays[] = strtotime('+39 days', mktime(0, 0, 0, $easterMonth, $easterDay, $easterYear));
// 1e Pinksterdag (= pasen + 49)
$holidays[] = strtotime('+49 days', mktime(0, 0, 0, $easterMonth, $easterDay, $easterYear));
// 2e Pinksterdag (= pasen + 50)
$holidays[] = strtotime('+50 days', mktime(0, 0, 0, $easterMonth, $easterDay, $easterYear));
sort($holidays);
return $holidays;
}
$holidays = getHolidays(2014);
foreach ($holidays as $holiday) {
echo date('d-M-Y', $holiday) . '<br>';
}
?>
ian at eiloart dot com-NOSPAM ¶
20 years ago
Also, be aware that the eastern orthodox churches sometimes have different dates for easter. See, for example <http://webexhibits.org/calendars/calendar-christian-easter.html>. And note that the dates of easter a subject to change, for example, the churches might some day decide to unify the dates.