Today (Saturday) We will make some minor tuning adjustments to MySQL.

You may experience 2 up to 10 seconds "glitch time" when we restart MySQL. We expect to make these adjustments around 1AM Eastern Daylight Saving Time (EDT) US.

IP2LONG(3)								 1								IP2LONG(3)

ip2long - Converts a string containing an (IPv4) Internet Protocol dotted address into a proper address

SYNOPSIS
int ip2long (string $ip_address)
DESCRIPTION
The function ip2long(3) generates an IPv4 Internet network address from its Internet standard format (dotted string) representation. ip2long(3) will also work with non-complete IP addresses. Read http://publibn.boul- der.ibm.com/doc_link/en_US/a_doc_lib/libs/commtrf2/inet_addr.htm for more info.
PARAMETERS
o $ip_address - A standard format address.
RETURN VALUES
Returns the IPv4 address or FALSE if $ip_address is invalid.
CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ |5.2.10 | | | | | | | Prior to this version, ip2long(3) would some- | | | times return a valid number even if passed an | | | value which was not an (IPv4) Internet Protocol | | | dotted address. | | | | +--------+---------------------------------------------------+
EXAMPLES
Example #1 ip2long(3) Example <?php $ip = gethostbyname('www.example.com'); $out = "The following URLs are equivalent:<br /> "; $out .= 'http://www.example.com/, http://' . $ip . '/, and http://' . sprintf("%u", ip2long($ip)) . "/<br /> "; echo $out; ?> Example #2 Displaying an IP address This second example shows how to print a converted address with the printf(3) function in both PHP 4 and PHP 5: <?php $ip = gethostbyname('www.example.com'); $long = ip2long($ip); if ($long == -1 || $long === FALSE) { echo 'Invalid IP, please try again'; } else { echo $ip . " "; // 192.0.34.166 echo $long . " "; // -1073732954 printf("%u ", ip2long($ip)); // 3221234342 } ?>
NOTES
Note Because PHP's integer type is signed, and many IP addresses will result in negative integers on 32-bit architectures, you need to use the "%u" formatter of sprintf(3) or printf(3) to get the string representation of the unsigned IP address. Note ip2long(3) will return FALSE for the IP 255.255.255.255 in PHP 5 <= 5.0.2. It was fixed in PHP 5.0.3 where it returns -1 (same as PHP 4).
SEE ALSO
long2ip(3), sprintf(3). PHP Documentation Group IP2LONG(3)

Featured Tech Videos