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


gethostbyaddr

(PHP 4, PHP 5)

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

说明

string gethostbyaddr ( string $ip_address )

Returns the host name of the Internet host specified by ip_address.

参数

ip_address

The host IP address.

返回值

Returns the host name or the unmodified ip_address on failure.

范例

Example #1 A simple gethostbyaddr() example

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

echo 
$hostname;
?>

参见

  • gethostbyname() - Get the IPv4 address corresponding to a given Internet host name
  • gethostbynamel() - Get a list of IPv4 addresses corresponding to a given Internet host name


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