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
