=over =item $MULTILINE_MATCHING =item $* Set to 1 to do multi-line matching within a string, 0 to tell Perl that it can assume that strings contain a single line, for the purpose of optimizing pattern matches. Pattern matches on strings containing multiple newlines can produce confusing results when "C<$*>" is 0. Default is 0. (Mnemonic: * matches multiple things.) Note that this variable influences the interpretation of only "C<^>" and "C<$>". A literal newline can be searched for even when C<$* == 0>. Use of "C<$*>" is deprecated in modern Perls, supplanted by the C and C modifiers on pattern matching. =back