how to check version of codeigniter framework?
<p>I recently setup a old Codeigniter framework on my xampp.But i don't know the version of this framework.
 I use the code </p>

<pre><code>&lt;?php echo CI_VERSION; ?&gt; 
</code></pre>

<p>but its give me error</p>

<pre><code>Notice: Use of undefined constant CI_VERSION - assumed 'CI_VERSION' in /opt/lampp/htdocs/projectname/views/v_header.php on line 57
CI_VERSION
</code></pre>

<p>Please guide me, I am new in Codeigniter. </p>