How can CSS formatting impact the layout of a PHP website, especially when redirecting to index.php?

CSS formatting can impact the layout of a PHP website by controlling the visual presentation of the content. When redirecting to index.php, it is important to ensure that the CSS styles are properly linked and applied to maintain the desired layout of the website.

<!DOCTYPE html>
<html>
<head>
    <title>My PHP Website</title>
    <link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>
    <?php
    // PHP code for redirection to index.php
    header("Location: index.php");
    exit;
    ?>
</body>
</html>