What design considerations should be taken into account when creating a PHP guestbook to ensure user-friendliness and aesthetics?

When creating a PHP guestbook, it is important to consider the user interface design to ensure user-friendliness and aesthetics. This includes using a clean and intuitive layout, providing clear instructions for users, implementing validation for user input, and incorporating features such as pagination for better navigation.

<!-- Example PHP code snippet for a guestbook form with user-friendly design considerations -->
<form action="submit.php" method="post">
    <label for="name">Name:</label><br>
    <input type="text" id="name" name="name" required><br><br>
    
    <label for="message">Message:</label><br>
    <textarea id="message" name="message" rows="4" cols="50" required></textarea><br><br>
    
    <input type="submit" value="Submit">
</form>