Checking if a constant is empty
<p>Why is this not possible?</p>

<pre><code>if(!empty( _MY_CONST)){
  ...
</code></pre>

<p>But yet this is:</p>

<pre><code>$my_const = _MY_CONST;
if(!empty($my_const)){
  ...
</code></pre>

<hr>

<pre><code>define( 'QUOTA_MSG' , '' ); // There is currently no message to show

$message = QUOTA_MSG;
if(!empty($message)){
  echo $message;
}
</code></pre>

<p>I just wanted to make it a little cleaner by just referencing the constant itself.</p>
