Untitled

<html>
<head>
<html>
<head>
<link rel="stylesheet" type="text/css" href="style.css" />
</head>
<body>
Please register<br>
<form method='POST'>
Desired username:<input type='text' name='username'/><br>
Password:<input type='password' name='pass'/><br>
Confirm Password:<input type='password' name='cpass'/><br>
<input type='submit' value='register'/><br>
<?php
error_reporting(E_ALL);
$dbc=mysqli_connect('localhost', <user>, <pass>'forum');
$user=mysql_real_escape_string($_POST['username']);
$pass=mysql_real_escape_string($_POST['pass']);
$cpass=mysql_real_escape_string($_POST['cpass']);
if($pass&&$cpass&&$user)
{
    if($pass==$cpass)
    {
        $pass=sha1($pass);
        $query="insert ignore into userdb (uname, password) values (".$user.",".$pass.")";
        mysqli_query($dbc, $query);
    }
    else
    {
        die("Passwords do not match");
    }
}
else
{
    die("Empty Fields!!!!");
}
mysqli_close($dbc);
?>
</body>
</html>