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<!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>将本地时间日期格式化为整数</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.idate" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">idate</h1>
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<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">idate</span> — <span class="dc-title">将本地时间日期格式化为整数</span></p>
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</div>
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<div class="refsect1 unknown-unknown-unknown-unknown-examplew" id="refsect1-function.idate-unknown-unknown-unknown-unknown-examplew">
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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>idate</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$format</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$timestamp</code></span>
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] ) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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根据给定的格式字符对 <code class="parameter">timestamp</code>
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格式化并返回数字结果。<code class="parameter">timestamp</code>
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为可选项，默认值为本地当前时间，即 <span class="function"><a href="time.html" class="function">time()</a></span> 的值。
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</p>
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<p class="para">
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和 <span class="function"><a href="date.html" class="function">date()</a></span> 不同，<span class="function"><strong>idate()</strong></span>
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只接受一个字符作为 <code class="parameter">format</code> 参数。
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</p>
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<p class="para">
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<table class="doctable table">
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<caption><strong><code class="parameter">format</code> 参数可识别以下字符</strong></caption>
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<thead>
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<tr>
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<th><code class="parameter">format</code> 字符</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><em>B</em></td>
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<td>Swatch Beat/Internet Time</td>
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</tr>
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<tr>
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<td><em>d</em></td>
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<td>月份中的第几天</td>
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</tr>
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<tr>
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<td><em>h</em></td>
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<td>小时（12 小时格式）</td>
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</tr>
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<tr>
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<td><em>H</em></td>
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<td>小时（24 小时格式）</td>
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</tr>
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<tr>
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<td><em>i</em></td>
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<td>分钟</td>
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</tr>
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<tr>
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<td><em>I</em></td>
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<td>如果启用夏时制则返回 <em>1</em>，否则返回 <em>0</em></td>
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</tr>
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<tr>
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<td><em>L</em></td>
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<td>如果是闰年则返回 <em>1</em>，否则返回 <em>0</em></td>
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</tr>
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<tr>
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<td><em>m</em></td>
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<td>月份的数字</td>
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</tr>
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<tr>
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<td><em>s</em></td>
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<td>秒数</td>
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</tr>
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<tr>
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<td><em>t</em></td>
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<td>本月的总天数</td>
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</tr>
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<tr>
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<td><em>U</em></td>
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<td>自 Unix 纪元（January 1 1970 00:00:00
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GMT）起的秒数——这和 <span class="function"><a href="time.html" class="function">time()</a></span> 作用相同</td>
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</tr>
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<tr>
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<td><em>w</em></td>
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<td>星期中的第几天（星期天是 <em>0</em>）</td>
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</tr>
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<tr>
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<td><em>W</em></td>
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<td>ISO-8601 格式年份中的第几个星期，每星期从星期一开始</td>
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</tr>
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<tr>
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<td><em>y</em></td>
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<td>年份（1 或 2 位数字——见下面说明）</td>
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</tr>
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<tr>
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<td><em>Y</em></td>
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<td>年份（4 位数字）</td>
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</tr>
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<tr>
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<td><em>z</em></td>
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<td>年份中的第几天</td>
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</tr>
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<tr>
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<td><em>Z</em></td>
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<td>以秒为单位的时区偏移量</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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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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因为 <span class="function"><strong>idate()</strong></span> 总是返回
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<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>，不能以“0”开头，因此 <span class="function"><strong>idate()</strong></span>
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可能会返回比用户期望中要少的数字。见下面例子：
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</p>
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</p></blockquote>
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<p class="para">
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<div class="informalexample">
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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 />$timestamp </span><span style="color: #007700">= </span><span style="color: #0000BB">strtotime</span><span style="color: #007700">(</span><span style="color: #DD0000">'1st January 2004'</span><span style="color: #007700">); </span><span style="color: #FF8000">//1072915200<br /><br />// 下面以两位数字格式显示年份，但是因为<br />// 以“0”打头，因此只会显示“4”<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">idate</span><span style="color: #007700">(</span><span style="color: #DD0000">'y'</span><span style="color: #007700">, </span><span style="color: #0000BB">$timestamp</span><span style="color: #007700">);<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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<p class="para">
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参见 <span class="function"><a href="date.html" class="function">date()</a></span> 和
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<span class="function"><a href="time.html" class="function">time()</a></span>。
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</p>
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</div>
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<!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>将本地时间日期格式化为整数</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.idate" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">idate</h1>
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<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">idate</span> — <span class="dc-title">将本地时间日期格式化为整数</span></p>
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</div>
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<div class="refsect1 unknown-unknown-unknown-unknown-examplew" id="refsect1-function.idate-unknown-unknown-unknown-unknown-examplew">
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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>idate</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$format</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$timestamp</code></span>
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] ) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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根据给定的格式字符对 <code class="parameter">timestamp</code>
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格式化并返回数字结果。<code class="parameter">timestamp</code>
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为可选项，默认值为本地当前时间，即 <span class="function"><a href="time.html" class="function">time()</a></span> 的值。
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</p>
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<p class="para">
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和 <span class="function"><a href="date.html" class="function">date()</a></span> 不同，<span class="function"><strong>idate()</strong></span>
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只接受一个字符作为 <code class="parameter">format</code> 参数。
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</p>
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<p class="para">
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<table class="doctable table">
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<caption><strong><code class="parameter">format</code> 参数可识别以下字符</strong></caption>
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<thead>
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<tr>
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<th><code class="parameter">format</code> 字符</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><em>B</em></td>
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<td>Swatch Beat/Internet Time</td>
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</tr>
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<tr>
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<td><em>d</em></td>
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<td>月份中的第几天</td>
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</tr>
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<tr>
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<td><em>h</em></td>
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<td>小时（12 小时格式）</td>
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</tr>
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<tr>
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<td><em>H</em></td>
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<td>小时（24 小时格式）</td>
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</tr>
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<tr>
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<td><em>i</em></td>
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<td>分钟</td>
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</tr>
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<tr>
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<td><em>I</em></td>
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<td>如果启用夏时制则返回 <em>1</em>，否则返回 <em>0</em></td>
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</tr>
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<tr>
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<td><em>L</em></td>
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<td>如果是闰年则返回 <em>1</em>，否则返回 <em>0</em></td>
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</tr>
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<tr>
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<td><em>m</em></td>
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<td>月份的数字</td>
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</tr>
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<tr>
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<td><em>s</em></td>
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<td>秒数</td>
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</tr>
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<tr>
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<td><em>t</em></td>
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<td>本月的总天数</td>
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</tr>
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<tr>
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<td><em>U</em></td>
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<td>自 Unix 纪元（January 1 1970 00:00:00
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GMT）起的秒数——这和 <span class="function"><a href="time.html" class="function">time()</a></span> 作用相同</td>
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</tr>
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<tr>
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<td><em>w</em></td>
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<td>星期中的第几天（星期天是 <em>0</em>）</td>
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</tr>
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<tr>
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<td><em>W</em></td>
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<td>ISO-8601 格式年份中的第几个星期，每星期从星期一开始</td>
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</tr>
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<tr>
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<td><em>y</em></td>
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<td>年份（1 或 2 位数字——见下面说明）</td>
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</tr>
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<tr>
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<td><em>Y</em></td>
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<td>年份（4 位数字）</td>
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</tr>
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<tr>
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<td><em>z</em></td>
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<td>年份中的第几天</td>
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</tr>
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<tr>
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<td><em>Z</em></td>
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<td>以秒为单位的时区偏移量</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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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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因为 <span class="function"><strong>idate()</strong></span> 总是返回
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<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>，不能以“0”开头，因此 <span class="function"><strong>idate()</strong></span>
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可能会返回比用户期望中要少的数字。见下面例子：
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</p>
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</p></blockquote>
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<p class="para">
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<div class="informalexample">
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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 />$timestamp </span><span style="color: #007700">= </span><span style="color: #0000BB">strtotime</span><span style="color: #007700">(</span><span style="color: #DD0000">'1st January 2004'</span><span style="color: #007700">); </span><span style="color: #FF8000">//1072915200<br /><br />// 下面以两位数字格式显示年份，但是因为<br />// 以“0”打头，因此只会显示“4”<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">idate</span><span style="color: #007700">(</span><span style="color: #DD0000">'y'</span><span style="color: #007700">, </span><span style="color: #0000BB">$timestamp</span><span style="color: #007700">);<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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<p class="para">
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参见 <span class="function"><a href="date.html" class="function">date()</a></span> 和
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<span class="function"><a href="time.html" class="function">time()</a></span>。
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</p>
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</div>
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</div></div></div></body></html>
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