'MessagesPreLoad': When loading a message from the database.
$title: title of the message (string)
&$message: value (string), change it to the message you want to define
+$code: code (string) denoting the language to try.
'MimeMagicGuessFromContent': Allows MW extensions guess the MIME by content.
$mimeMagic: Instance of MimeMagic.
'SpecialSearchResults': Called before search result display
$term: string of search term
-&$titleMatches: empty or SearchResultSet object
-&$textMatches: empty or SearchResultSet object
+$titleMatches: empty or SearchResultSet object
+$textMatches: empty or SearchResultSet object
'SpecialSearchResultsPrepend': Called immediately before returning HTML
on the search results page. Useful for including an external search