Function: Get the course rating by course ID

Function: Query rating and reviews

Filter Hook: Filter the default query parameter of dozent_get_course_reviews();

Function: Get single review result from database by review ID

Filter Hook: Filter review result

Function: Get the DozentLMS course archive URL

Filter Hook: Filters the course archive page URL

Function: Get all available selling platforms

Filter Hook: Filters the list of selling platforms available on the DozentLMS.

Function: Updates a post meta field based on the given post ID. or delete existing meta if $meta_value is empty