Filter Hook: Filters to filter course requirements

Function: Return the course target_audience which belongs with _target_audience meta with the course

Filter Hook: Filters the course target_audience data

Function: Return course target_audience as array, it will convert every line to array elements

Filter Hook: Filters to filter course target_audience

Function: Return the placeholder image source

Filter Hook: Filter the return value of dozent_placeholder_img_src();

Function: Get all user social links generated by DozentLMS

Filter Hook: Filter single social link by given meta key, it will return one single array from the all available social links

Filter Hook: Filter hook to modify the output of dozent_get_user_social_links(); function