owever <code class="docutils literal"><span class="pre">config_item()</span></code> can be used
to retrieve single keys. See <a class="reference internal" href="../libraries/config.html"><em>Config Library</em></a>
documentation for more information.</p>
</dd></dl>

<dl class="function">
<dt id="set_status_header">
<code class="descname">set_status_header</code><span class="sig-paren">(</span><em>$code</em><span class="optional">[</span>, <em>$text = ''</em><span class="optional">]</span><span class="sig-pa