Function: Return the Usermeta Quiz array for the Essay Post ID.
Function: Updates the essays post meta with a reference to the quiz attempt user meta.
Function: Updates the user’s submitted essay data.
Action Hook: Fires after the essay response data is updated.
Function: Updates the user’s quiz data.
Action Hook: Fires after the essay quiz data is updated.
Function: Updates the quiz activity for a user.
Function: Updates the quiz statistics for the given quiz attempt.
Action Hook: Fires after the essay question stats are updated.
Function: Handles the AJAX file upload for an essay question.
Filter Hook: Filters whether to allow essay upload or not if the user is not logged in.
Function: Handles the file uploads for the essays.
Function: Deletes the uploaded file when essay post is deleted.
Action Hook: Fires after a new essay is submitted.
Function: Gets the essay data for this particular submission
Function: Adds a new essay response.
Filter Hook: Filters list of allowed html tags in essay content.
Filter Hook: Filters new essay submission `wp_insert_post` arguments.
Function: Registers the essay post type.
Function: Adds the essay post type capabilities.