title: Codeigniter dbutil throwing unsupported error
body: <p>This is my controller function to backup my database</p>
  
  <pre><code>function backupSystem(){
  // Load the DB utility class
  $this-&gt;load-&gt;dbutil();
  $prefs = array(
  'format' =&gt; 'zip',
  'filename' =&gt; 'mybackup.zip', 
  'add_drop' =&gt; TRUE, 
  'add_insert' =&gt; TRUE, 
  );
  $backup =&amp; $this-&gt;dbutil-&gt;backup($prefs); 
  // Load the file helper and write the file to your server
  $this-&gt;load-&gt;helper('file');
  write_file("&lt;?php echo base_url();?&gt;/backup_db/mybackup.zip", $backup);
  }
  </code></pre>
  
  <p>Here backup_db is the folder i created to store result which is in the same location where application lies</p>
  
  <p>Running the controller throws me this kind of errors</p>
  
  <blockquote>
    <p><strong>A Database Error Occured</strong></p>
    
    <p>Unsupported feature of the database platform you are using.
    Filename:D:\xampp\htdocs\scholarship\system\database\mysqli\mysqli_utility.php</p>
  </blockquote>
  
  <p>Line Number:82 </p>
  
  <p>This project has an older version of codeigniter being used. Is it the older version does not support backup. Also need suggestion is it the best way to backup database because as per the documentation does not recommend to backup larger database with it .</p>