i got this PHP question from my friend about variable dollar sign
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/2715654/what-does-mean-in-php">what does $$ mean in PHP?</a>  </p>
</blockquote>



<p>what is the different between $thisvariable and $$thisvariable. as you notice, the first variable has one dollar sign while the second got two dollar signs.</p>
