Using WordPress ‘add_existing_user_to_blog()’ PHP function
Adds a user to a blog based on details from maybe_add_existing_user_to_blog() .
HTTPS
Using WordPress ‘comments_link_feed()’ PHP function
Outputs the link to the comments for the current post in an XML safe way.
Using WordPress ‘comment_form()’ PHP function
Outputs a complete commenting form for use within a template.
Using WordPress ‘build_query()’ PHP function
Builds URL query based on an associative and, or indexed array.