Описание
string
inet_pton ( string address )
This function converts a human readable IPv4 or IPv6 address (if PHP
was built with IPv6 support enabled) into an address family appropriate
32bit or 128bit binary structure.
Замечание: Для Windows-платформ
эта функция не реализована.
See also ip2long(),
inet_ntop(), and
long2ip().