What are the potential drawbacks of using frames in PHP for URL manipulation?

Using frames in PHP for URL manipulation can lead to issues with search engine optimization (SEO) as search engines may not be able to properly index the content within frames. Additionally, frames can make it difficult for users to bookmark or share specific pages within the website. To solve this issue, it is recommended to use PHP header functions to redirect users to the desired URL instead of using frames for URL manipulation.

<?php
// Redirect users to the desired URL using PHP header function
header("Location: http://www.example.com/newpage.php");
exit;
?>