This page redirects to an external site: https://developer.wordpress.org/reference/functions/url_is_accessable_via_ssl/
Determines if the blog can be accessed over SSL.
Determines if blog can be accessed over SSL by using cURL to access the site using the https in the siteurl. Requires cURL extension to work correctly.
<?php url_is_accessable_via_ssl( $url ); ?>
url_is_accessable_via_ssl() is located in wp-includes/functions.php