$sql = "INSERT INTO toplist
(serverName, serverPassword, serverIp, serverPort, serverBanner,
serverShortDescription, serverDescription)
VALUES
('$_POST[serverName]', '$_POST[serverPassword]', '$_POST[serverIp]',
'$_POST[serverPort]', '$_POST[serverBanner]',
'$_POST[serverShortDescription]', '$_POST[serverDescription]')";
if (!mysql_query($sql, $con)) {
die('Error: ' . mysql_error());
}
echo "The server " . $_POST[serverName] . "," . $_POST[serverIp]
. " has been added.";
mysql_close($con);
如何使得当“serverIp”条目不存在时,它会被添加到数据库中,若已经存在,则不做任何操作。这个过程是否对大小写敏感?你是否可以通过以此方式进行绕过:bY tYpInG LiKe tHiS?