How can JavaScript be utilized to handle form submissions and page redirection in PHP to avoid header modification warnings?

When handling form submissions in PHP, if there is any output sent to the browser before the header() function is called to redirect the page, it will result in a "header modification" warning. To avoid this issue, JavaScript can be utilized to handle the form submission and redirect the page without any output being sent to the browser before the header redirection. 

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Process form data
    // Perform any necessary validation or processing

    // Redirect using JavaScript instead of header() function
    echo '<script>window.location.replace("redirect_page.php");</script>';
    exit;
}
?>

Keywords

JavaScript form submissions page redirection PHP header modification warnings

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