PHP 忒聊 綴豖 ヶ輛 ip2long (PHP 4) Description The function ip2long() generates an IPv4 Internet network address from its Internet standard format (dotted string) representation. 瞰赽 1. ip2long() Example ?php $ip = gethostbyname("www.example.com"); $out = "The following URLs are equivalent: br \n"; $out .= "http://www.example.com/, http://".$ip."/, and http://".sprintf("%u",ip2long($ip))."/ br \n"; echo $out;? 蛁: Because PHP's integer type is signed, and many IP addresses will result in negative integers, you need to use the "%u" formatter of sprintf() or printf() to get the string representation of the unsigned IP address. 瞰赽 2. Displaying an IP address ?php $ip = gethostbyname("www.example.com"); printf("%u\n", ip2long($ip)); echo $out;? See also: long2ip() 綴豖 れ萸 ヶ輛 getservbyport 奻珨撰 long2ip