How can PHP and HTML be effectively combined to create a user-friendly interface for inputting and displaying dynamic form fields based on database content?

To create a user-friendly interface for inputting and displaying dynamic form fields based on database content, PHP can be used to interact with the database and dynamically generate HTML elements. By retrieving data from the database and populating form fields with this data, users can easily input information. Additionally, dynamic form fields can be displayed based on the content of the database, providing a customized and interactive experience for users.

<?php
// Connect to the database
$connection = mysqli_connect("localhost", "username", "password", "database");

// Retrieve data from the database
$query = "SELECT * FROM form_fields";
$result = mysqli_query($connection, $query);

// Display dynamic form fields based on database content
echo "<form>";
while ($row = mysqli_fetch_assoc($result)) {
    echo "<label>{$row['field_name']}</label>";
    echo "<input type='text' name='{$row['field_name']}'><br>";
}
echo "<input type='submit' value='Submit'>";
echo "</form>";

// Close the database connection
mysqli_close($connection);
?>