What does === mean in php
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/1117967/what-does-mean">What does &ldquo;===&rdquo; mean?</a>  </p>
</blockquote>



<p>i am seeing === often in php statements, but don't know what it mean.
e.g if ($pwd === PwdHash($pass,substr($pwd,0,9))).
thanks</p>
