Untitled

<?php
$dbhost = "localhost";
$dbname = "test";
$dbusername = "root";
$dbpass = "";
try {
    $DBH = new PDO("mysql:host=$dbhost;dbname=$dbname", $dbusername, $dbpass);
}
catch(PDOException $db) {
    echo $db->getMessage();
}

if (isset($_POST['submit'])) {
    $title = $_POST['title'];
    $message = $_POST['message'];
    try {
        $STH = $DBH->prepare("INSERT INTO example (title, message) values (:title, :message)");
        $STH->bindParam(':title', $title);
        $STH->bindParam(':message', $message);
        $STH->execute();
    }
    catch(PDOException $db) {
        echo $db->getMessage();
    }
    echo "Данные введены успешно";
}
if (isset($_POST['print'])) {
    $STH = $DBH->query('SELECT title, message from example');

}

?>
<!DOCTYPE html>
<html>
<head>
    <title></title>
</head>
<body>
<form  action="action.php" method="POST">
    <p>Заголовок<input type="text" name="title"/></p>
    <p>Сообщение<textarea name="message"></textarea></p>
    <input type="submit" name="submit" value="Оправить" />
    <p><input type="submit" name="print" value="Вывести"</p></br>
    <?php   while ($row = $STH->fetch(PDO::FETCH_ASSOC)):
    echo $row['title'] . "</br>";
    echo $row['message'] . "</br>";
    endwhile;
    ?>
</form>
</body>
</html>