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gethostbyname

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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

  • checkdnsrr
  • closelog
  • define_syslog_variables
  • dns_check_record
  • dns_get_mx
  • dns_get_record
  • fsockopen
  • gethostbyaddr
  • gethostbyname
  • gethostbynamel
  • gethostname
  • getmxrr
  • getprotobyname
  • getprotobynumber
  • getservbyname
  • getservbyport
  • header
  • headers_list
  • headers_sent
  • header_register_callback
  • header_remove
  • http_response_code
  • inet_ntop
  • inet_pton
  • ip2long
  • long2ip
  • openlog
  • pfsockopen
  • setcookie
  • setrawcookie
  • socket_get_status
  • socket_set_blocking
  • socket_set_timeout
  • syslog
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