AddInputFilter
AddInputFilter filter[;filter...] extension [extension ...] directory, files, location, .htaccess AddInputFilter is only available in Apache 2.0.26 and later.
AddInputFilter maps the filename extensions
extension to the filter or filters that will
process client requests and POST input when they are received by the
server. This is in addition to any filters defined elsewhere,
including the SetInputFilter directive. This
mapping is merged over any already in force, overriding any mappings
that already exist for the same extension.
If more than one filter is specified, they must be separated by
semicolons in the order in which they should process the content.
Both the filter and extension arguments are case
insensitive, and the extension may be specified with or without a
leading dot.