set-cookie-on-element-click.php

<?php

add_action( 'wp_footer', 'my_custom_popup_scripts', 500 );

function my_custom_popup_scripts() { ?>

<script type="text/javascript">
	
	(function ($, document, undefined) {
		$('css-selector-for-the-close-button').click(function (e) { $('#popmake-166').trigger('pumSetCookie'); });
	}(jQuery, document))
	
</script><?php
	
}

How exactly should I write that code in my functions.php file? It's giving me errors. And when I remove the php and script tags, it won't accept the $. Please advise. Thank you.