non ho capito bene come validarlo:

codice:
#  Warning  Line 5, Column 41: character "<" is the first character of a delimiter but occurred as data.

…a http-equiv="Content-Type" content="<?php bloginfo('html_type'); ?>; charset

✉

This message may appear in several cases:

    * You tried to include the "<" character in your page: you should escape it as "&lt;"
    * You used an unescaped ampersand "&": this may be valid in some contexts, but it is recommended to use "&amp;", which is always safe.
    * Another possibility is that you forgot to close quotes in a previous tag.

cosa mi suggerite??