Comments on: Convert an IP address to IP number with PHP, ASP, C# and VB.Net http://www.justin-cook.com/wp/2006/11/28/convert-an-ip-address-to-ip-number-with-php-asp-c-and-vbnet/ A web, technology, programming and SEO blog by Justin Cook Wed, 10 Mar 2010 21:22:18 -0600 http://wordpress.org/?v=2.8.6 hourly 1 By: Jack http://www.justin-cook.com/wp/2006/11/28/convert-an-ip-address-to-ip-number-with-php-asp-c-and-vbnet/comment-page-1/#comment-155780 Jack Tue, 11 Aug 2009 14:51:26 +0000 http://www.justin-cook.com/wp/2006/11/28/convert-an-ip-address-to-ip-number-with-php-asp-c-and-vbnet/#comment-155780 See similar converter in action at <a href="http://www.webtoolhub.com/tn561377-ip-address-number-converter.aspx" rel="nofollow">http://www.webtoolhub.com/tn561377-ip-address-number-converter.aspx</a> See similar converter in action at http://www.webtoolhub.com/tn561377-ip-address-number-converter.aspx

]]> By: Josh http://www.justin-cook.com/wp/2006/11/28/convert-an-ip-address-to-ip-number-with-php-asp-c-and-vbnet/comment-page-1/#comment-155732 Josh Tue, 04 Aug 2009 12:58:11 +0000 http://www.justin-cook.com/wp/2006/11/28/convert-an-ip-address-to-ip-number-with-php-asp-c-and-vbnet/#comment-155732 SQL/MySQL Anyone? DELIMITER $$ DROP FUNCTION IF EXISTS `__schema__`.`INT2IP` $$ CREATE FUNCTION `__schema__`.`INT2IP` ( address INT UNSIGNED ) RETURNS VARCHAR(15) BEGIN RETURN CONCAT_WS('.', address >> 24 & 255, address >> 16 & 255, address >> 8 & 255, address & 255 ); END $$ DROP FUNCTION IF EXISTS `__schema__`.`IP2INT` $$ CREATE FUNCTION `__schema__`.`IP2INT` ( address VARCHAR(15) ) RETURNS INT UNSIGNED BEGIN RETURN SUBSTRING_INDEX( address, '.', 1 ) * 16777216 + SUBSTRING_INDEX( SUBSTRING_INDEX( address, '.', 2 ),'.',-1 ) * 65536 + SUBSTRING_INDEX( SUBSTRING_INDEX( address, '.', -2 ),'.',1 ) * 256 + SUBSTRING_INDEX( address, '.', -1 ); END $$ DELIMITER ; SQL/MySQL Anyone?

DELIMITER $$

DROP FUNCTION IF EXISTS `__schema__`.`INT2IP` $$
CREATE FUNCTION `__schema__`.`INT2IP` ( address INT UNSIGNED ) RETURNS VARCHAR(15)
BEGIN

RETURN CONCAT_WS('.',
address >> 24 & 255,
address >> 16 & 255,
address >> 8 & 255,
address & 255 );

END $$

DROP FUNCTION IF EXISTS `__schema__`.`IP2INT` $$
CREATE FUNCTION `__schema__`.`IP2INT` ( address VARCHAR(15) ) RETURNS INT UNSIGNED
BEGIN

RETURN
SUBSTRING_INDEX( address, '.', 1 ) * 16777216 +
SUBSTRING_INDEX( SUBSTRING_INDEX( address, '.', 2 ),'.',-1 ) * 65536 +
SUBSTRING_INDEX( SUBSTRING_INDEX( address, '.', -2 ),'.',1 ) * 256 +
SUBSTRING_INDEX( address, '.', -1 );

END $$

DELIMITER ;

]]> By: pim http://www.justin-cook.com/wp/2006/11/28/convert-an-ip-address-to-ip-number-with-php-asp-c-and-vbnet/comment-page-1/#comment-154601 pim Fri, 13 Feb 2009 13:09:23 +0000 http://www.justin-cook.com/wp/2006/11/28/convert-an-ip-address-to-ip-number-with-php-asp-c-and-vbnet/#comment-154601 Those 256 * 256 * 256 always make me laugh. Here's a PHP version that's roughly 2 times faster than the one in the post. And yes, I'm aware of ip2long. function ip2num( $ip ) { if ( empty( $ip ) ) return 0; $ip = explode( '.', $ip ); return ( $ip[0] << 24 ) | ( $ip[1] << 16 ) | ( $ip[2] << 8 ) | $ip[3]; } Those 256 * 256 * 256 always make me laugh. Here's a PHP version that's roughly 2 times faster than the one in the post. And yes, I'm aware of ip2long.

function ip2num( $ip )
{
if ( empty( $ip ) ) return 0;
$ip = explode( '.', $ip );

return ( $ip[0] << 24 ) | ( $ip[1] << 16 ) | ( $ip[2] << 8 ) | $ip[3];
}

]]>