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140 lines
5.7 KiB
HTML
140 lines
5.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>得到指定年份的3月21日到复活节之间的天数</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.easter-days" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">easter_days</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">easter_days</span> — <span class="dc-title">得到指定年份的3月21日到复活节之间的天数</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.easter-days-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>easter_days</strong></span>
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([ <span class="methodparam"><span class="type">int</span> <code class="parameter">$year</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$method</code><span class="initializer"> = CAL_EASTER_DEFAULT</span></span>
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]] ) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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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。
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</p>
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<p class="para">
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这个函数可以用来代替<span class="function"><a href="easter_date.html" class="function">easter_date()</a></span>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）
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</p>
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<p class="para">
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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）
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.easter-days-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">year</code></dt>
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<dd>
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<p class="para">
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正数形式的年份
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</p>
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</dd>
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<dt>
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<code class="parameter">method</code></dt>
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<dd>
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<p class="para">
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当设置为<strong><code>CAL_EASTER_ROMAN</code></strong>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<a href="calendar.constants.html" class="link">calendar constants</a>。
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.easter-days-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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根据给定参数<code class="parameter">year</code>年份而返回的3月21日至复活节的天数。
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.easter-days-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>Since 4.3.0</td>
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<td>
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参数<code class="parameter">year</code> 可选，缺省默认值是当年。
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</td>
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</tr>
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<tr>
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<td>Since 4.3.0</td>
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<td>
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引入参数 <code class="parameter">method</code>。
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.easter-days-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-2646">
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<p><strong>Example #1 <span class="function"><strong>easter_days()</strong></span> example</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /><br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">easter_days</span><span style="color: #007700">(</span><span style="color: #0000BB">1999</span><span style="color: #007700">); </span><span style="color: #FF8000">// 14, i.e. April 4<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">easter_days</span><span style="color: #007700">(</span><span style="color: #0000BB">1492</span><span style="color: #007700">); </span><span style="color: #FF8000">// 32, i.e. April 22<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">easter_days</span><span style="color: #007700">(</span><span style="color: #0000BB">1913</span><span style="color: #007700">); </span><span style="color: #FF8000">// 2, i.e. March 23<br /><br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.easter-days-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="easter_date.html" class="function" rel="rdfs-seeAlso">easter_date()</a> - 得到指定年份的复活节午夜时的Unix时间戳。</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |