Code that limits the number of registrants of the same IP address

Today, let's take a look at the code that limits the number of registrants of the same IP address. Note that we need to use the datediff function, which is very simple.

$ Ex_ SQL = mysql_query ("Select * from wk_member where m_ip = '$ ip' and datediff (m_dtime,' $ dtime') = 0 ");
If (mysql_num_rows ($ ex_ SQL) <5 ){
$ SQL;
If (mysql_query ($ SQL )){
$ _ SESSION ['uid'] = array (mysql_insert_id (), $ uid, $ mo );
Exit ("<script> location = 'registerok. php'; </script> ");
} Else {
Alert ('registration failed! ','');
}
} Else {
Alert ('Sorry, only five users can be registered with the same IP address each day ','');
}

In this way, you can create a program to restrict IP addresses by voting. In the end, please indicate www.111cn.cn/phper/php.html for original reprinting on this site.