-no_xhtml

    By default, CGI.pm versions 2.69 and higher emit XHTML (http://www.w3.org/TR/xhtml1/). The -no_xhtml pragma disables this feature. Thanks to Michalis Kabrianis <kabrianis@hellug.gr> for this feature.

    If start_html()'s -dtd parameter specifies an HTML 2.0 or 3.2 DTD, XHTML will automatically be disabled without needing to use this pragma.