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141 lines
4.8 KiB
HTML
141 lines
4.8 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>给指定的主机（域名）或者IP地址做DNS通信检查</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.checkdnsrr" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">checkdnsrr</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">checkdnsrr</span> — <span class="dc-title">给指定的主机（域名）或者IP地址做DNS通信检查</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.checkdnsrr-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>checkdnsrr</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$host</code></span>
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[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$type</code><span class="initializer"> = "MX"</span></span>
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] ) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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根据不同记录（<code class="parameter">type</code>）类型查询主机（<code class="parameter">host</code>）相应的DNS记录。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.checkdnsrr-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">host</code></dt>
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<dd>
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<p class="para">
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主机（<code class="parameter">host</code>）可以是一个IP地址也可以是域名。
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</p>
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</dd>
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<dt>
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<code class="parameter">type</code></dt>
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<dd>
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<p class="para">
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解析记录类型（<code class="parameter">type</code>）可能是下面这些类型中的任何一个：A，MX，NS，SOA，PTR，CNAME，AAAA，A6， SRV，NAPTR，TXT 或者 ANY。
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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.checkdnsrr-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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如果记录能找到，就返回<strong><code>TRUE</code></strong>；如果查找不到该DNS记录或者发生了错误，就返回<strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.checkdnsrr-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>5.3.0</td>
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<td>
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这个函数在Windows平台上也可以使用了。
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</td>
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</tr>
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<tr>
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<td>5.2.4</td>
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<td>
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增加了TXT的记录<code class="parameter">类型</code>。
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</td>
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</tr>
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<tr>
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<td>5.0.0</td>
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<td>
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增加了AAAA的记录<code class="parameter">类型</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 notes" id="refsect1-function.checkdnsrr-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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出于对低版本在windows平台上的兼容性，可以试试<a href="http://pear.php.net/" class="link external">» PEAR</a>扩展包里面提供的
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<a href="http://pear.php.net/package/Net_DNS" class="link external">» Net_DNS</a>类。
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.checkdnsrr-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="dns_get_record.html" class="function" rel="rdfs-seeAlso">dns_get_record()</a> - 获取指定主机的DNS记录</span></li>
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<li class="member"><span class="function"><a href="getmxrr.html" class="function" rel="rdfs-seeAlso">getmxrr()</a> - 获取互联网主机名对应的 MX 记录</span></li>
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<li class="member"><span class="function"><a href="gethostbyaddr.html" class="function" rel="rdfs-seeAlso">gethostbyaddr()</a> - 获取指定的IP地址对应的主机名</span></li>
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<li class="member"><span class="function"><a href="gethostbyname.html" class="function" rel="rdfs-seeAlso">gethostbyname()</a> - 返回主机名对应的 IPv4地址。</span></li>
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<li class="member"><span class="function"><a href="gethostbynamel.html" class="function" rel="rdfs-seeAlso">gethostbynamel()</a> - 获取互联网主机名对应的 IPv4 地址列表</span></li>
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<li class="member">the named(8) manual page</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> |