Untitled

<?php


class Guestbook {
    private $pdo;

    function __construct()
    {
        $this->pdo = new PDO('mysql:host=localhost;dbname=guestbook_test', 'root', '');
    }

    public function saveGuestbookEntry($author, $email, $message)
    {
        if ($this->validateGuestbookEntry($author, $email, $message) === true) {
            $cursor = $this->pdo->prepare('INSERT INTO guestbook_entries (author, email, message, create_date) VALUES (?, ?, ?, NOW())');
            $cursor->execute(array($author, $email, $message));
            $cursor->closeCursor();
        } else {
            $this->showError('Your input looks incorrect, please check it');
        }
    }

    private function validateGuestbookEntry($author, $email, $message)
    {
        if (
            strlen($author) >= 2 &&
            filter_var($email, FILTER_VALIDATE_EMAIL) &&
            strlen($message) >= 5
        ) {
            return true;
        } else {
            return false;
        }
    }

    private function showError($message)
    {
        echo '<div class="error">' . $message . '</div>';
    }

    public function getGuestbookEntries()
    {
        $cursor = $this->pdo->prepare('SELECT * FROM guestbook_entries ORDER BY create_date DESC');
        $cursor->execute();
        $result = $cursor->fetchAll(PDO::FETCH_ASSOC);
        $cursor->closeCursor();

        return $result;
    }
}

$guestbookInstance = new Guestbook();

if (isset($_POST['submit'])) {
    $guestbookInstance->saveGuestbookEntry($_POST['author'], $_POST['email'], $_POST['message']);
}

?>
<!doctype html>
<html>
    <head>
        <meta charset="UTF-8">
    </head>
    <body>
        <section>
            <form action="#" method="post">
                <input type="text" name="author" placeholder="Author"><br>
                <input type="text" name="email" placeholder="Email"><br>
                <textarea name="message" placeholder="Message"></textarea><br>
                <input type="submit" value="Send" name="submit">
            </form>
        </section>
        <section>
            <?php
                $entries =  $guestbookInstance->getGuestbookEntries();
                if (count($entries) > 0) {
                    foreach ($entries as $entry) {
                        echo "<div>";
                        echo "<h3>{$entry['message']}</h3>";
                        echo "<p>{$entry['author']}</p>";
                        echo "</div>";
                    }
                } else {
                    echo "<p>No entries found.</p>";
                }
            ?>
        </section>
    </body>
</html>