创建表
<pre>
CREATE TABLE `user` (
`id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(100) NOT NULL,
`ip` int(10) unsigned NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
</pre>
插入几条数据
<pre>
INSERT INTO `user` (`id`, `name`, `ip`) VALUES
(2, 'Abby', inet_aton('192.168.1.1')),
(3, 'Daisy', inet_aton('172.16.11.66')),
(4, 'Christine', inet_aton('220.117.131.12'));
</pre>
查询显示为电地址
<pre>
mysql> select id,name,inet_ntoa(ip) as ip from `user`;
+----+-----------+----------------+
| id | name | ip |
+----+-----------+----------------+
| 2 | Abby | 192.168.1.1 |
| 3 | Daisy | 172.16.11.66 |
| 4 | Christine | 220.117.131.12 |
+----+-----------+----------------+
</pre>
比较方法
如果需要找出在某个网段的用户(例如:172.16.11.1 ~ 172.16.11.100),可以利用PHP的ip2long方法,把ip地址转为整型,再进行比较。
<pre>
mysql> select ip,name,inet_ntoa(ip) as ip from `user` where ip>=2886732545 and ip<=2886732644;
+------------+-------+---------------+
| ip | name | ip |
+------------+-------+---------------+
| 2886732610 | Daisy | 172.16.11.66 |
+------------+-------+---------------+
</pre>
注意:使用ip2long方法把ip地址转为整型时,对于大的ip会出现负数,采取如下方案
<pre>
<?php
$ip = '192.168.101.100';
$ip_long = sprintf('%u',ip2long($ip));
echo $ip_long.PHP_EOL;
?>
</pre>