How can the EVA principle be applied when writing PHP code to display data from a MySQL database in a dropdown box?

When displaying data from a MySQL database in a dropdown box in PHP, the EVA principle can be applied by separating the concerns of the application into distinct layers: the Model, View, and Controller. The Model handles interactions with the database, the View is responsible for displaying the data, and the Controller acts as an intermediary between the Model and View. 

// Controller
<?php
// Include database connection file
include 'db_connection.php';

// Retrieve data from the database
$query = "SELECT id, name FROM dropdown_data";
$result = mysqli_query($connection, $query);

// Store the retrieved data in an array
$data = [];
while ($row = mysqli_fetch_assoc($result)) {
    $data[] = $row;
}

// Load the view file
include 'dropdown_view.php';
?>

// View (dropdown_view.php)
<!DOCTYPE html>
<html>
<head>
    <title>Dropdown Box</title>
</head>
<body>
    <select>
        <?php foreach ($data as $row): ?>
            <option value="<?php echo $row['id']; ?>"><?php echo $row['name']; ?></option>
        <?php endforeach; ?>
    </select>
</body>
</html>

Keywords

PHP MySQL EVA principle dropdown box data display

Related Questions