Using WordPress ‘has_filter()’ PHP function
Checks if any filter has been registered for a hook.
add_filter
Using WordPress ‘get_the_taxonomies()’ PHP function
The `get_the_taxonomies()` function in WordPress allows you to retrieve all taxonomies associated with a post, including their labels and terms
Using WordPress ‘get_the_author_url()’ PHP function
Retrieve the URL to the home page of the author of the current post.
Using WordPress ‘is_allowed_http_origin()’ PHP function
The `is_allowed_http_origin()` function in WordPress checks whether the HTTP origin is an authorized one