What are the potential pitfalls of using header redirection in PHP for form submissions?

Using header redirection for form submissions in PHP can lead to potential pitfalls such as headers already sent errors if there is any output before the header function is called. To solve this issue, it is recommended to use output buffering to prevent any output before the header function is called. 

<?php
ob_start();

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

ob_end_flush();
?>

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