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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>返回当前缓存的到期时间</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.session-cache-expire" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">session_cache_expire</h1>
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<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">session_cache_expire</span> — <span class="dc-title">返回当前缓存的到期时间</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.session-cache-expire-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>session_cache_expire</strong></span>
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([ <span class="methodparam"><span class="type">string</span> <code class="parameter">$new_cache_expire</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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<span class="function"><strong>session_cache_expire()</strong></span> 返回
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<em>session.cache_expire</em> 的设定值。
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</p>
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<p class="para">
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请求开始的时候，缓存到期时间会被重置为 180，并且保存在
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<a href="session.configuration.html#ini.session.cache-expire" class="link">session.cache_expire</a> 配置项中。
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因此，针对每个请求，需要在 <span class="function"><a href="session_start.html" class="function">session_start()</a></span> 函数调用之前
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调用 <span class="function"><strong>session_cache_expire()</strong></span> 来设置缓存到期时间。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.session-cache-expire-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">new_cache_expire</code></dt>
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<dd>
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<p class="para">
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如果给定 <code class="parameter">new_cache_expire</code> ，就使用
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<code class="parameter">new_cache_expire</code> 的值设置当前缓存到期时间。
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</p>
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<p class="para">
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<span class="simpara">
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仅在 <em>session.cache_limiter</em> 的设置值
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<em class="emphasis">不是</em> <em>nocache</em> 的时候，
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才可以设置 <code class="parameter">new_cache_expire</code> 参数。
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</span>
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</p></blockquote>
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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.session-cache-expire-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回 <em>session.cache_expire</em> 的当前设置值，
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以分钟为单位，默认值是 180 （分钟）。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.session-cache-expire-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-5829">
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<p><strong>Example #1 <span class="function"><strong>session_cache_expire()</strong></span> 示例</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: #FF8000">/* 设置缓存限制为 “private” */<br /><br /></span><span style="color: #0000BB">session_cache_limiter</span><span style="color: #007700">(</span><span style="color: #DD0000">'private'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$cache_limiter </span><span style="color: #007700">= </span><span style="color: #0000BB">session_cache_limiter</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/* 设置缓存过期时间为 30 分钟 */<br /></span><span style="color: #0000BB">session_cache_expire</span><span style="color: #007700">(</span><span style="color: #0000BB">30</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$cache_expire </span><span style="color: #007700">= </span><span style="color: #0000BB">session_cache_expire</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/* 开始会话 */<br /><br /></span><span style="color: #0000BB">session_start</span><span style="color: #007700">();<br /><br />echo </span><span style="color: #DD0000">"The cache limiter is now set to </span><span style="color: #0000BB">$cache_limiter</span><span style="color: #DD0000"><br />"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">"The cached session pages expire after </span><span style="color: #0000BB">$cache_expire</span><span style="color: #DD0000"> minutes"</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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</div>
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<div class="refsect1 seealso" id="refsect1-function.session-cache-expire-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"><a href="session.configuration.html#ini.session.cache-expire" class="link">session.cache_expire</a></li>
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<li class="member"><a href="session.configuration.html#ini.session.cache-limiter" class="link">session.cache_limiter</a></li>
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<li class="member"><span class="function"><a href="session_cache_limiter.html" class="function" rel="rdfs-seeAlso">session_cache_limiter()</a> - 读取/设置缓存限制器</span></li>
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</ul>
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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>返回当前缓存的到期时间</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.session-cache-expire" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">session_cache_expire</h1>
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<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">session_cache_expire</span> — <span class="dc-title">返回当前缓存的到期时间</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.session-cache-expire-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>session_cache_expire</strong></span>
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([ <span class="methodparam"><span class="type">string</span> <code class="parameter">$new_cache_expire</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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<span class="function"><strong>session_cache_expire()</strong></span> 返回
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<em>session.cache_expire</em> 的设定值。
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</p>
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<p class="para">
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请求开始的时候，缓存到期时间会被重置为 180，并且保存在
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<a href="session.configuration.html#ini.session.cache-expire" class="link">session.cache_expire</a> 配置项中。
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因此，针对每个请求，需要在 <span class="function"><a href="session_start.html" class="function">session_start()</a></span> 函数调用之前
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调用 <span class="function"><strong>session_cache_expire()</strong></span> 来设置缓存到期时间。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.session-cache-expire-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">new_cache_expire</code></dt>
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<dd>
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<p class="para">
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如果给定 <code class="parameter">new_cache_expire</code> ，就使用
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<code class="parameter">new_cache_expire</code> 的值设置当前缓存到期时间。
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</p>
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<p class="para">
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<span class="simpara">
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仅在 <em>session.cache_limiter</em> 的设置值
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<em class="emphasis">不是</em> <em>nocache</em> 的时候，
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才可以设置 <code class="parameter">new_cache_expire</code> 参数。
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</span>
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</p></blockquote>
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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.session-cache-expire-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回 <em>session.cache_expire</em> 的当前设置值，
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以分钟为单位，默认值是 180 （分钟）。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.session-cache-expire-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-5829">
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<p><strong>Example #1 <span class="function"><strong>session_cache_expire()</strong></span> 示例</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: #FF8000">/* 设置缓存限制为 “private” */<br /><br /></span><span style="color: #0000BB">session_cache_limiter</span><span style="color: #007700">(</span><span style="color: #DD0000">'private'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$cache_limiter </span><span style="color: #007700">= </span><span style="color: #0000BB">session_cache_limiter</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/* 设置缓存过期时间为 30 分钟 */<br /></span><span style="color: #0000BB">session_cache_expire</span><span style="color: #007700">(</span><span style="color: #0000BB">30</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$cache_expire </span><span style="color: #007700">= </span><span style="color: #0000BB">session_cache_expire</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/* 开始会话 */<br /><br /></span><span style="color: #0000BB">session_start</span><span style="color: #007700">();<br /><br />echo </span><span style="color: #DD0000">"The cache limiter is now set to </span><span style="color: #0000BB">$cache_limiter</span><span style="color: #DD0000"><br />"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">"The cached session pages expire after </span><span style="color: #0000BB">$cache_expire</span><span style="color: #DD0000"> minutes"</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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</div>
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<div class="refsect1 seealso" id="refsect1-function.session-cache-expire-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"><a href="session.configuration.html#ini.session.cache-expire" class="link">session.cache_expire</a></li>
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<li class="member"><a href="session.configuration.html#ini.session.cache-limiter" class="link">session.cache_limiter</a></li>
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<li class="member"><span class="function"><a href="session_cache_limiter.html" class="function" rel="rdfs-seeAlso">session_cache_limiter()</a> - 读取/设置缓存限制器</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>
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