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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.8 $ -->
<!-- splitted from ./en/functions/network.xml, last change in rev 1.2 -->
<refentry id="function.checkdnsrr">
<refnamediv>
<refname>checkdnsrr</refname>
<refpurpose>
Check DNS records corresponding to a given Internet host name or
IP address
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>int</type><methodname>checkdnsrr</methodname>
<methodparam><type>string</type><parameter>host</parameter></methodparam>
<methodparam choice="opt"><type>string</type><parameter>type</parameter></methodparam>
</methodsynopsis>
<simpara>
Searches DNS for records of type <parameter>type</parameter>
corresponding to <parameter>host</parameter>. Returns &true; if any
records are found; returns &false; if no records were found or if
an error occurred.
</simpara>
<simpara>
<parameter>type</parameter> may be any one of: A, MX, NS, SOA,
PTR, CNAME, AAAA, A6, SRV, NAPTR or ANY. The default is MX.
</simpara>
<simpara>
<parameter>host</parameter> may either be the IP address in
dotted-quad notation or the host name.
</simpara>
<para>
<note>
<simpara>
AAAA type added with PHP 5.0.0
</simpara>
</note>
</para>
<para>
<note>
<simpara>
This function is not implemented on Windows platforms. Try the
<ulink url="&url.php.pear;">PEAR</ulink> class
<ulink url="&url.pear.package;Net_DNS">Net_DNS</ulink>.
</simpara>
</note>
</para>
<simpara>
See also <function>dns_get_record</function>,
<function>getmxrr</function>,
<function>gethostbyaddr</function>,
<function>gethostbyname</function>,
<function>gethostbynamel</function>, and the named(8) manual
page.
</simpara>
</refsect1>
</refentry>
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