gethostbyname

(PHP 4, PHP 5)

gethostbyname — Get the IPv4 address corresponding to a given Internet host name

string gethostbyname ( string $hostname )

Returns the IPv4 address of the Internet host specified by hostname.

Returns the IPv4 address or a string containing the unmodified hostname on failure.

Example #1 A simple gethostbyname() example


<?php
$ip = gethostbyname('www.example.com');

echo $ip;
?>

gethostbyaddr() - 获取指定的IP地址对应的主机名
gethostbynamel() - Get a list of IPv4 addresses corresponding to a given Internet host name
inet_pton() - Converts a human readable IP address to its packed in_addr representation
inet_ntop() - Converts a packed internet address to a human readable representation