What kind of statement this is?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/3737139/reference-what-does-this-symbol-mean-in-php">Reference - What does this symbol mean in PHP?</a>  </p>
</blockquote>



<pre><code>is_int (func_get_arg($i)) ? $sum += func_get_arg($i) : die('use only integers');
</code></pre>

<p>what kind of statement this is or what is the name of this statement.where can i learn more about this statement?</p>
