<?php
$con = mysql_connect("localhost","36664","Strong1");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("36664", $con);

if (!mysql_query($sql,$con))
  {
  die('Error: ' . mysql_error());
  }
$user = mysql_real_escape_string($user);
$query = "SELECT * FROM members WHERE username='$user';";
$res = mysql_query($query);
if (mysql_num_rows($res) > 0) {
echo "Sorry that username already exists, please go back and choose another.";
} else
$sql="INSERT INTO members (username, password)
VALUES
('$_POST[user]','$_POST[passwd]')";

mysql_close($con)
?>