Function: Removes single-use URL parameters and create canonical link based on new URL.

Function: Saves the XML document into a file.

Function: Makes a tree structure for the plugin file editor’s file list.

Function: Outputs the formatted file list for the plugin file editor.

Function: Flushes rewrite rules if siteurl, home or page_on_front changed.

Function: Resets global variables based on $_GET and $_POST.

Function: Displays the given administration message.

Function:

Function: Saves option for number of rows when listing posts, pages, comments, etc.