gethostbyname
(PHP 4, PHP 5)
gethostbyname — Get the IPv4 address corresponding to a given Internet host name
说明
string gethostbyname ( string $hostname )Returns the IPv4 address of the Internet host specified by hostname.
参数
- hostname
-
The host name.
返回值
Returns the IPv4 address or a string containing the unmodified hostname on failure.
范例
Example #1 A simple gethostbyname() example
<?php
$ip = gethostbyname('www.example.com');
echo $ip;
?>
参见
- gethostbyaddr() - Get the Internet host name corresponding to a given IP address
- 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
