What are the advantages of using associative arrays with keys instead of numerical values in PHP form submissions for better data organization and processing?

When processing form submissions in PHP, using associative arrays with keys instead of numerical values allows for better data organization and processing. Associative arrays make it easier to access specific form fields by their names, rather than relying on their numerical index. This approach also provides more flexibility in handling form data, as you can easily add, remove, or modify fields without affecting the rest of the data structure.

// Sample PHP code snippet demonstrating the use of associative arrays in form submissions

// Assuming form data is submitted via POST method
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Initialize an empty associative array to store form data
    $formData = [];

    // Loop through each form field and populate the associative array
    foreach ($_POST as $key => $value) {
        $formData[$key] = $value;
    }

    // Access specific form fields by their names
    $username = $formData['username'];
    $email = $formData['email'];

    // Process the form data as needed
    // ...
}