Page-level control variables
The following variables can be modified by plugins to affect page-level behaviour:
$page_requestedTitlePrepend
This variable allows a module to insert content to the start of the page's existing title. See Changing a Page Title from within a Plugin for more detail.
$page_requestedTitleAppend
This variable allows a module to insert content at the end of the page's existing title. See Changing a Page Title from within a Plugin for more detail.