What are the limitations of using PHP to close windows on a web page?

When using PHP to close windows on a web page, one limitation is that PHP is a server-side language and cannot directly interact with the client-side browser. To close a window using PHP, you would need to use JavaScript, which is a client-side language that can manipulate the browser window. You can use PHP to generate JavaScript code that will close the window when executed by the browser.

<?php
echo '<script type="text/javascript">';
echo 'window.close();';
echo '</script>';
?>