Forumchem - Forum with AI(ALICE BOT & HAL9000) and TTS

Im trying to design a website for a school project and I created this code for the registration page.

$userreg = $_POST[newuser];
$passreg = $_POST[newpass];

$taken = false;
$database = seniorproject;
$password = ;
$username = root;

if($userreg&&$passreg)

$con = mysql_connect(localhost,$username,$password) or die ("Unable to log in to database");
***($database, $con) or die ("Unable to connect");

mysql_query("INSERT INTO user VALUES(,$userreg, $passreg)") or die ("Error");

echo "Account Creation Successful";

mysql_close($con);

header("Location: index.html");

else
echo "Error: You need to have both a username and password";


?>

But it keeps giving me this error: Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /Applications/XAMPP/xamppfiles/htdocs/register.php:13 Stack trace: #0 main thrown in /Applications/XAMPP/xamppfiles/htdocs/register.php on line 13

Whats wrong? any help would be appreciated, thanks guys!