+ $match =~ s/\?/\\?/g; # escape question marks.
+ $match =~ s/\|/\\?/g; # escape pipe char.
+ $match =~ s/\$/\\\$/g; # escape dollar sign.
+ $match =~ s/\[/\\[/g; # escape open bracket.
+ $match =~ s/\]/\\]/g; # escape close bracket.
+ $match =~ s/\(/\\(/g; # escape open quote.
+ $match =~ s/\)/\\)/g; # escape close quote.
+ $match =~ s/\{/\\{/g; # escape open curly bracket.
+ $match =~ s/\}/\\}/g; # escape close curly bracket.
+