 and <em class="parameter"><code>values</code></em> arrays are specified,
    an <em class="firstterm">armor header</em> is added to the armored format for each
    key/value pair. Both arrays must be single-dimensional, and they must
    be of the same length.  The keys and values cannot contain any non-ASCII
    characters.
   </p></div><div class="sect3" id="PGCRYPTO-PGP-ENC-FUNCS-PGP-ARMOR-HEADERS"><div class="titlepage"><div><div><h4 class="title">F.28.3.7. <code class="function">pgp_armor_headers</co