<?php

      mysql_connect("localhost", "DB_USER", "DB_PASS");
      mysql_select_db("DB_NAME");

      function addUser($username, $password, $email){
              $username = mysql_real_escape_string($username);
              $password = md5($password);
              $email = mysql_real_escape_string($email);
              $ip = $_SERVER['REMOTE_ADDR'];

              mysql_query("INSERT INTO `users` (`id`, `username`, `pass`, `email`, `ip`) VALUES (NULL, '$username', '$password', '$email', '$ip');");
      }
      ?>