function.easter-date.html
来自「php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容」· HTML 代码 · 共 159 行
HTML
159 行
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Get Unix timestamp for midnight on Easter of a given year</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.cal-to-jd.html">cal_to_jd</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.easter-days.html">easter_days</a></div> <div class="up"><a href="ref.calendar.html">Calendar Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.easter-date" class="refentry"> <div class="refnamediv"> <h1 class="refname">easter_date</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">easter_date</span> — <span class="dc-title">Get Unix timestamp for midnight on Easter of a given year</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><b><b>easter_date</b></b></span> ([ <span class="methodparam"><span class="type">int</span> <tt class="parameter">$year</tt></span> ] )</div> <p class="para rdfs-comment"> Returns the Unix timestamp corresponding to midnight on Easter of the given year. </p> <div class="warning"><b class="warning">Warning</b> <p class="para"> This function will generate a warning if the year is outside of the range for Unix timestamps (i.e. before 1970 or after 2037). </p> </div> <p class="para"> The date of Easter Day was defined by the Council of Nicaea in AD325 as the Sunday after the first full moon which falls on or after the Spring Equinox. The Equinox is assumed to always fall on 21st March, so the calculation reduces to determining the date of the full moon and the date of the following Sunday. The algorithm used here was introduced around the year 532 by Dionysius Exiguus. Under the Julian Calendar (for years before 1753) a simple 19-year cycle is used to track the phases of the Moon. Under the Gregorian Calendar (for years after 1753 - devised by Clavius and Lilius, and introduced by Pope Gregory XIII in October 1582, and into Britain and its then colonies in September 1752) two correction factors are added to make the cycle more accurate. </p> <p class="para"> (The code is based on a C program by Simon Kershaw, <webmaster at ely.anglican dot org>) </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">year</tt></i></span> <dd> <p class="para"> The year as a number between 1970 an 2037 </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> The easter date as a unix timestamp. </p> </div> <div class="refsect1 changelog"> <h3 class="title">ChangeLog</h3> <p class="para"> <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Version</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Since 4.3.0</td> <td colspan="1" rowspan="1" align="left"> The <i><tt class="parameter">year</tt></i> parameter is optional and defaults to the current year according to the local time if omitted. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>easter_date()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"M-d-Y"</span><span style="color: #007700">, </span><span style="color: #0000BB">easter_date</span><span style="color: #007700">(</span><span style="color: #0000BB">1999</span><span style="color: #007700">)); </span><span style="color: #FF8000">// Apr-04-1999<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"M-d-Y"</span><span style="color: #007700">, </span><span style="color: #0000BB">easter_date</span><span style="color: #007700">(</span><span style="color: #0000BB">2000</span><span style="color: #007700">)); </span><span style="color: #FF8000">// Apr-23-2000<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"M-d-Y"</span><span style="color: #007700">, </span><span style="color: #0000BB">easter_date</span><span style="color: #007700">(</span><span style="color: #0000BB">2001</span><span style="color: #007700">)); </span><span style="color: #FF8000">// Apr-15-2001<br /><br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <a href="function.easter-days.html" class="function" rel="rdfs-seeAlso">easter_days()</a> for calculating Easter before 1970 or after 2037 </li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.cal-to-jd.html">cal_to_jd</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.easter-days.html">easter_days</a></div> <div class="up"><a href="ref.calendar.html">Calendar Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?