strtoupper isn't working in my code : <pre><code>&lt;?php
if(!empty($_POST['code'])){
$code = strtoupper($code);
$param[':code'] = $_POST['code'];
$sql .= 'AND `code` = :code';
}
?&gt;
</code></pre>

<p>strtoupper don't working. Why? Any advices?</p>
