 it's automatically
passed to the Output class, which will be called automatically by CodeIgniter at the end of system execution.
It is possible, however, for you to manually intervene with the output if you need to, using either of the two following functions:</p>

<h2>$this->output->set_output();</h2>

<p>Permits you to manually set the final output string.  Usage example:</p>

<code>$this->output->set_output($data);</code>

<p><strong>Important:</strong> If you do set your output manually, it must be the