What are the potential issues with automatically reloading a page with POST data in PHP?

When automatically reloading a page with POST data in PHP, the main issue is that the POST data will be resubmitted every time the page is refreshed, potentially causing unintended actions or duplicate submissions. To solve this issue, you can use the Post/Redirect/Get (PRG) pattern, where after processing the POST data, you redirect the user to another page using the GET method to prevent the resubmission of POST data. 

// Process POST data
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Process the POST data here
    
    // Redirect to another page using GET method
    header("Location: another_page.php");
    exit();
}

Keywords

POST data page reload session variables form submission CSRF protection

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