What best practices should be followed when dealing with form submissions in PHP to avoid redirection issues?

When dealing with form submissions in PHP to avoid redirection issues, it is best practice to use a technique called Post/Redirect/Get (PRG) pattern. This involves processing the form submission, then redirecting to a different page to avoid resubmission when the user refreshes the page. By following this pattern, you can prevent multiple form submissions and potential data duplication. 

// Process form submission
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Handle form data
    // Redirect to a different page
    header("Location: success.php");
    exit;
}

Keywords

form submissions PHP redirection security validation

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