What is the significance of using unique identifiers, such as database record IDs, as array keys in form submissions in PHP?

Using unique identifiers, such as database record IDs, as array keys in form submissions in PHP ensures that each form submission is uniquely identified and can be easily processed or updated in the database. This approach helps prevent data duplication and allows for efficient data manipulation. By using unique identifiers as array keys, you can easily retrieve and update specific form submissions without having to iterate through the entire array.

// Assuming $formData is an array containing form submissions with unique identifiers as keys
if(isset($_POST['submit'])) {
    $formId = $_POST['form_id']; // Assuming form_id is passed in the form submission
    $formData[$formId] = $_POST;
    
    // Process or update the form submission with the unique identifier $formId
}