#8211; Additional output data to append</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Output instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Output</p>
</td>
</tr>
</tbody>
</table>
<p>Appends data onto the output string.</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nv">$this</span><span c