$ip = $_SERVER['REMOTE_ADDR'];

$dbhost = 'XXXXXXXX';
$dbuser = 'XXXXXXXX';
$dbpass = 'XXXXXXXXX';
$conn = mysql_connect($dbhost, $dbuser, $dbpass) or die ('Error connecting to mysql');
$dbname = 'XXXXXXXXXX';
mysql_select_db($dbname);


$logip = "INSERT INTO mytable (myfield) VALUES ($ip)";