What potential pitfalls should be considered when transitioning from using array-based field names to individual field names with IDs in PHP forms?

When transitioning from using array-based field names to individual field names with IDs in PHP forms, potential pitfalls to consider include the need to update all form processing logic to handle individual field names, the risk of introducing errors during the transition process, and the possibility of breaking existing functionality that relies on array-based field names.

// Example of updating form processing logic to handle individual field names with IDs
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $field1 = $_POST["field1"];
    $field2 = $_POST["field2"];
    
    // Process form data using individual field names
}