$connectdb = mysql_connect('ip','root','pass');
$selectdb = mysql_select_db("vb");
$ip = $_SERVER['REMOTE_ADDR'];
$query = mysql_query("SELECT * FROM clients WHERE ip='".$ip."'");
if (mysql_num_rows($query) == 0) {
echo ' يرجى التحدث مع الادارة لاضافتك';
 } else {
$row = mysql_fetch_assoc($query);
echo $row['id'];
}
mysql_close($connectdb);