<?php  session_start(); ?>
<?php
include 'config.php';
if(isset($_POST['submit'])){
$submittedUser = $_POST['username'];
$submittedPass = $_POST['password'];
$encrypteduser = password_hash($submittedUser, PASSWORD_ARGON2I);

$con=mysqli_connect($servername, $dbusername, $dbpassword, $dbname);
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
if ($stmt = mysqli_prepare($con, "SELECT * FROM users Where username =?")) {
                    mysqli_stmt_bind_param($stmt, "s", $encrypteduser);
                    mysqli_stmt_execute($stmt);
                    $result = mysqli_stmt_get_result($stmt);
}

while($row = mysqli_fetch_array($result))
{
$username = $row['username'];
$password = $row['password'];
}
if (password_verify($submittedUser, $username) && password_verify($submittedPass, $password))
{
$_SESSION['user']=$username;

echo "<script> location.href='index.php'; </script>";
        exit;
}
else
{
 echo "<script> location.href='login.php'; </script>";
        exit;
}
mysqli_close($con);
}
?>