What are the best practices for handling form submissions and redirects in PHP to prevent errors like headers already sent?

When handling form submissions and redirects in PHP, it's important to ensure that no output is sent to the browser before headers are set for redirection. To prevent errors like "headers already sent," you can use output buffering to capture any output before sending headers. 

<?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();
?>

Keywords

header ob_start ob_end_flush output buffering form handling

Related Questions