title: Constants and CodeIgniter
body: <p>Can constants in CodeIgniter be used for things like recurring text (say metatags and meta-descriptions) throughout the site?  Something like:</p>
  
  <pre><code>define('METADESCRIPTION', 'This is my site');
  </code></pre>
  
  <p>and then echo METADESCRIPTION into the meta tags?</p>
  
  <pre><code>&lt;meta name="description" content="&lt;?php echo METADESCRIPTION; ?&gt;"&gt; 
  </code></pre>