What is the Post/Redirect/Get pattern and how can it be implemented in PHP forms?

The Post/Redirect/Get (PRG) pattern is a web development design pattern that helps prevent duplicate form submissions and improve user experience. It involves redirecting the user to a different URL after processing a form submission using the POST method. This prevents users from accidentally resubmitting the form data by refreshing the page. 

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Process form data

    // Redirect to a different URL to prevent form resubmission
    header("Location: success.php");
    exit();
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>Form Example</title>
</head>
<body>
    <form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>">
        <!-- Form fields go here -->
        <input type="submit" value="Submit">
    </form>
</body>
</html>

Keywords

Post/Redirect/Get pattern PHP forms implementation form submission header redirection

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