gethostbyaddr

(PHP 3, PHP 4, PHP 5)

gethostbyaddr --  Get the Internet host name corresponding to a given IP address

Description

string gethostbyaddr ( string ip_address )

Returns the host name of the Internet host specified by ip_address or a string containing the unmodified ip_address on failure.

例子 1. A simple gethostbyaddr() example

<?php
$hostname
= gethostbyaddr($_SERVER['REMOTE_ADDR']);
  
echo
$hostname;
?>

See also gethostbyname(), and gethostbynamel().