title: difference between define(...) and @define(...)
body: <p>Quick question, what is the difference between the following two declarations:</p>
  
  <pre><code>define('I_LIKE_AT_SIGNS', false);
  </code></pre>
  
  <p>and </p>
  
  <pre><code>@define('I_LIKE_AT_SIGNS', true);
  </code></pre>
  
  <p>I.e. what does the <code>@</code>-sign do?</p>