Shortcode to display URL parameter.php

/** Shortcode to display URL parameter
Shortcode: [URLVar param='firstname']
Plugin: https://www.warrenchandler.com/2021/09/11/wordpress-shortcode-to-get-text-from-url-vars-parameters/
–––––––––––––––––––––––––––––––––––––––––––––––––– **/
function wsv_show_url_variable($atts)
{
	extract(
		shortcode_atts(
			array(
				'param' => 'param'
			),
			$atts
		)
	);

	return stripslashes(esc_attr(esc_html($_GET[$param])));
}
add_shortcode('URLVar', 'wsv_show_url_variable');