function.getmxrr.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Get MX records corresponding to a given Internet host name</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.gethostbynamel.html">gethostbynamel</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.getprotobyname.html">getprotobyname</a></div> <div class="up"><a href="ref.network.html">Network Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.getmxrr" class="refentry"> <div class="refnamediv"> <h1 class="refname">getmxrr</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">getmxrr</span> — <span class="dc-title">Get MX records corresponding to a given Internet host name</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>getmxrr</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$hostname</tt></span> , <span class="methodparam"><span class="type">array</span> <tt class="parameter reference">&$mxhosts</tt></span> [, <span class="methodparam"><span class="type">array</span> <tt class="parameter reference">&$weight</tt></span> ] )</div> <p class="para rdfs-comment"> Searches DNS for MX records corresponding to <i><tt class="parameter">hostname</tt></i>. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">hostname</tt></i></span> <dd> <p class="para"> The Internet host name. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">mxhosts</tt></i></span> <dd> <p class="para"> A list of the MX records found is placed into the array <i><tt class="parameter">mxhosts</tt></i>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">weight</tt></i></span> <dd> <p class="para"> If the <i><tt class="parameter">weight</tt></i> array is given, it will be filled with the weight information gathered. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> if any records are found; returns <b><tt>FALSE</tt></b> if no records were found or if an error occurred. </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <blockquote><p><b class="note">Note</b>: This function should not be used for the purposes of address verification. Only the mailexchangers found in DNS are returned, however, according to <a href="http://www.faqs.org/rfcs/rfc2821" class="link external">» RFC 2821</a> when no mail exchangers are listed, <i><tt class="parameter">hostname</tt></i> itself should be used as the only mail exchanger with a priority of <i>0</i>. <br /> </p></blockquote> <blockquote><p><b class="note">Note</b>: This function is not implemented on Windows platforms. Try the <a href="http://pear.php.net/" class="link external">» PEAR</a> class <a href="http://pear.php.net/package/Net_DNS" class="link external">» Net_DNS</a>. <br /> </p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.checkdnsrr.html" class="function" rel="rdfs-seeAlso">checkdnsrr()</a></li> <li class="member"><a href="function.dns-get-record.html" class="function" rel="rdfs-seeAlso">dns_get_record()</a></li> <li class="member"><a href="function.gethostbyname.html" class="function" rel="rdfs-seeAlso">gethostbyname()</a></li> <li class="member"><a href="function.gethostbynamel.html" class="function" rel="rdfs-seeAlso">gethostbynamel()</a></li> <li class="member"><a href="function.gethostbyaddr.html" class="function" rel="rdfs-seeAlso">gethostbyaddr()</a></li> <li class="member">the <i>named(8)</i> manual page</li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.gethostbynamel.html">gethostbynamel</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.getprotobyname.html">getprotobyname</a></div> <div class="up"><a href="ref.network.html">Network Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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