Filter Hook: Filter single date time properties

Filter Hook: Filter the default course price type, return when price type is not set at the course.

Filter Hook: Filter the default value of dozent_get_discussion_questions();

Filter Hook: Filter the profile photo id returned by dozent_get_profile_photo_id();

Filter Hook: Filter the dozent_get_question_types() return

Filter Hook: Dozent Quiz Functions

Filter Hook: Filter quiz single option when $option_key is exists

Filter Hook: Filter quiz options

Filter Hook: Filter the return of dozent_get_courses_by_instructor() function

Filter Hook: Filter the default quizzes status for Count course including {post_status}