How can unset() or other PHP functions be effectively used to prevent re-entry issues in form submissions?

To prevent re-entry issues in form submissions, you can use the unset() function in PHP to unset the form data after it has been successfully processed. This ensures that the form data is not resubmitted if the user refreshes the page or navigates back to the form. 

// Process form submission
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate and process form data

    // Unset form data to prevent re-entry
    unset($_POST);
}

Keywords

unset PHP functions re-entry issues form submissions prevent

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