When the user submitted the form it stays to register page instead logging the user in

This occurs when I reinstall XAMMP but I don’t think that is not the issue.

When I am trying to submit the form before it redirects to index page and logging the user in and starting a session but now after reinstalling XAMMP and recreate the database it is not working.

But there were changes I made upon creating the database I changed the value and type but I don’t think that is the issue here.

Also, the log-in function is not working either it gives the error handler wrong password even thou it is correct since I used the password verify for the password and hashed password.

I really appreciate your help I tried searching and can’t find the correct answer

Here is the code below for my controller.php :

// Check if there are any errors
if (count($errors) == 0) {
    $hashed_password = password_hash($password, PASSWORD_DEFAULT);
    // Insert the new user into the database, but do not log them in

    if (isset($_POST['user_type'])) {
        
        $usertype = $_POST['user_type'];

        $query = "INSERT INTO user_table (username, email, user_type, password) VALUES 
(?, ?, ?, ?)";
        $stmt = $db->prepare($query);
        $stmt->bind_param('ssss', $username, $email, $usertype, $hashed_password);
        $stmt->execute();

        header('Location: ./admin.php');

} else {
        // Insert the new user into the database and log them in
        
        $query = "INSERT INTO user_table (username, email, user_type, password) VALUES 
(?, ?, ?, ?)";
        $stmt = $db->prepare($query);
        $stmt->bind_param('ssss', $username, $email, $usertype, $hashed_password);
        $stmt->execute();
    
        // Check the user's credentials
        $query = $db->prepare("SELECT * FROM user_table WHERE username = ? AND password 
 = ?");
        $query->bind_param('ss', $username, $hashed_password);
        $query->execute();
        $result = $query->get_result();
    
        // If a matching record was found, log the user in
        if ($result->num_rows > 0) {
            $user = $result->fetch_assoc();
        
            // Start a new session
            session_start();
    
            $_SESSION['user_id'] = $user['id'];
            $_SESSION['username'] = $user['username'];
            $_SESSION['user_type'] = $user['user_type'];
            $_SESSION['success']  = "You are now logged in";
            header('location:../index.php');
 }
}

function loginuser() { 

global $db, $username, $password, $errors;


    // Prepare the SQL statement
    $stmt = $db->prepare("SELECT * FROM user_table WHERE username = ?");

    // Bind the username to the prepared statement
    $stmt->bind_param("s", $username);

    // Execute the statement
    $stmt->execute();

    // Get the result
    $result = $stmt->get_result();

    // Check if the username exists in the database
    if ($result->num_rows === 0) {
    // Show an error message if the username does not exist
    $errors['inlgn'] = "Incorrect username or password";
    

    } else {
    // Get the user data
    $user = $result->fetch_assoc();

    // Get the hashed password from the database
    $hashed_password = $user['password'];
    

    // Verify the password using the password_verify() function
    if (password_verify($password, $hashed_password)) {
        
    // The password is correct, so log the user in
    // Start a new session
    session_start();

    // Store the user's ID and username in the session
    $_SESSION['user_id'] = $user['id'];
    $_SESSION['username'] = $user['username'];
    $_SESSION['user_type'] = $user['user_type'];
    

    // Set the success message
    $_SESSION['success'] = "You are now logged in";

    // Redirect the user to the homepage
    header('Location: ./index.php');
    } else {
    // The password is incorrect, so show an error message
    $errors['pwdm'] = "Wrong Password";
    }
}   

}