The SearchHighLight? Help:WikiPlugin is an Help:ActionPage plugin, which is only used internally.

When someone is referred from a search engine like Google, Yahoo or our own fulltextsearch, the terms the user searched for are highlighted. See also

Plugin Arguments

s: The search term
case_exact: boolean.
regex: boolean.

PHP Warning

Warning: "substr() expects parameter 3 to be long, string given"

Notice: "readonly database"