Contact page HTML5 - PDO - MySQL - localhost - WAMP

Contact page

<article id = "page-contact" class="page-round">
    <!-- Contact -->
    <header>
        <h2>Contact</h2>					
    </header>
    <p>Email [email protected]</p>		
    <?php
    if (isset($_POST['submit'])) {
        $dbh = new PDO('mysql:host=localhost;dbname=register', 'root', '', array(
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_EMULATE_PREPARES => false,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC));
        try {
            $stmt = $dbh->prepare("INSERT INTO registered(Name, Email, Message) values (?,?,?)");
            $stmt->bindParam(1, $name);
            $stmt->bindParam(2, $email);
            $stmt->bindParam(3, $message);
            $human = $_POST['human'];
            if ($human == '4') {
                if (empty($_POST["name"])) {
                    
                } else {
                    $name = $_POST["name"];
                }
                if (empty($_POST["email"])) {
                    
                } else {
                    $email = $_POST["email"];
                }
                if (empty($_POST["message"])) {
                    
                } else {
                    $message = $_POST["message"];
                }
            } else {
                echo '<b><p><font color="red">Something went wrong, please and try again!</font></p></b>';
            }
            $stmt->execute();
            echo'<b><p><font color="green">Thank you, I will contact you soon!</font></p></b>';
        } catch (PDOException $e) {
            if ($e->errorInfo[1] == 1048) {
                echo '<b><p><font color="red">You missed either name, spam, message or email.</font></p></b>';
            } elseif ($e->errorInfo[1] == 1062) {
                // duplicate entry, do something else
                echo '<b><p><font color="red">This email has already been added!</font></p></b>';
            } else {
                // an error other than duplicate entry occurred
                echo "Exception caught: $e";
            }
        }
    }
    ?>
    <form method="post" action="#page-contact">
        <label class="name">Name</label>
        <input class="name" name="name" type="name" placeholder="Type Here">
        <label class="email">Email</label>
        <input class="email" name="email" type="email" placeholder="Type Here">
        <label class="human">*What is 2+2? (Anti-spam)</label>
        <input class="human" name="human" placeholder="Type Here">
        <div id="message">
            <label>Message</label>
            <textarea name="message" type="message" placeholder="Type Here"></textarea>
            <input id="submit" name="submit" type="submit" value="submit">					
        </div>
    </form>
    <nav class="next-prev">
        <a class="prev page-projects" href="#page-projects">Menu<img class="arrow-up"></img></a>
        <hr />
        <a class="next page-about" href="#page-about">Next<img class="arrow"></img></a>
    </nav>					
</article>