How do I fix PHP Warning: array_unique() expects parameter 1 to be array, string given in
<p>How to fix </p>

<blockquote>
  <p>PHP Warning: array_unique() expects parameter 1 to be array, string
  given in</p>
</blockquote>

<p>Code :</p>

<pre><code>$subitems_values=sanitize($_REQUEST['subitems']);
$subitems_values = array_unique($subitems_values); // error line.
$SubItemToken=implode(",", $subitems_values);
$cnt=count($subitems_values);
</code></pre>