php-doc-en/reference/network/functions/gethostbyaddr.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.7 $ -->
<!-- splitted from ./en/functions/network.xml, last change in rev 1.2 -->
  <refentry id="function.gethostbyaddr">
   <refnamediv>
    <refname>gethostbyaddr</refname>
    <refpurpose>
     Get the Internet host name corresponding to a given IP address
    </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>string</type><methodname>gethostbyaddr</methodname>
      <methodparam><type>string</type><parameter>ip_address</parameter></methodparam>
     </methodsynopsis>
    <para>
     Returns the host name of the Internet host specified by
     <parameter>ip_address</parameter> or a string containing the unmodified 
     <parameter>ip_address</parameter> on failure.
    </para>
    <para>
     <example>
      <title>A simple <function>gethostbyaddr</function> example</title>
      <programlisting role="php">
<![CDATA[
<?php
$hostname = gethostbyaddr($_SERVER['REMOTE_ADDR']);
  
echo $hostname;
?>
]]>
      </programlisting>
     </example>
    </para>
    <para>
     See also <function>gethostbyname</function>, and
     <function>gethostbynamel</function>.
    </para>
   </refsect1>
  </refentry>

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