n><span class="o">-&gt;</span><span class="na">foo</span><span class="p">(</span><span class="nv">$parts</span><span class="p">);</span>
</pre></div>
</div>
</div>
<div class="section" id="constants">
<h2><a class="toc-backref" href="#id10">Constants</a><a class="headerlink" href="#constants" title="Permalink to this headline">¶</a></h2>
<p>Constants follow the same guidelines as do variables, except constants
should always be fully uppercase. <em>Always use CodeIgniter constants when
appropriate, i.e. SLA