r.
If the parameter is not used, a trailing slash added. Examples:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">slash_segment</span><span class="p">(</span><span class="mi">3</span><span class="p">);</span>
<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">slash_segment</span><