Function: Add a link to using values provided in $_POST.

Function: Updates or inserts a link using values provided in $_POST.

Function: Retrieves the default link for editing.

Function: Deletes a specified link from the database.

Function: Retrieves the link category IDs associated with the link specified.

Function: Retrieves link data based on its ID.

Function: Inserts a link into the database, or updates an existing link.

Function: Update link with the specified link categories.

Function: Updates a link in the database.

Function: Outputs the ‘disabled’ message for the ClassicPress Link Manager.