ip2long
(PHP 4 )
ip2long -- Converts a string containing an (IPv4) Internet Protocol dotted address into a proper address.Description
int ip2long ( string ip_address)The function ip2long() generates an IPv4 Internet network address from its Internet standard format (dotted string) representation. If ip_address is invalid than -1 is returned. Note that -1 does not evaluate as FALSE in PHP.
Note: 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.
Note: ip2long() will return -1 for the ip 255.255.255.255