What is the best practice for clearing form field values in PHP after submitting a form to prevent duplicate submissions?

When a form is submitted in PHP, it is common to clear the form field values to prevent duplicate submissions. This can be achieved by resetting the values of the form fields after processing the form data. By doing this, the user will see an empty form after submitting, reducing the chances of accidental resubmissions. 

// Check if the form has been submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Process form data here
    
    // Clear form field values
    $_POST = array();
}

Keywords

PHP form submission form fields prevent duplicates clearing values

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