What are the drawbacks of redirecting to the same page after processing a POST request in PHP?

Redirecting to the same page after processing a POST request in PHP can lead to a form resubmission prompt if the user refreshes the page, potentially causing duplicate form submissions. To solve this issue, after processing the POST request, you can redirect to the same page using a GET request to prevent the form data from being resubmitted. 

if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    // Process the form data

    // Redirect to the same page using GET request
    header("Location: {$_SERVER['REQUEST_URI']}");
    exit;
}

Keywords

redirect POST request session data form resubmission browser cache

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