Encrypting/Protecting Source Code PHP
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/3177497/php-protecting-code">PHP - protecting code</a>  </p>
</blockquote>



<p>I am considering making my software written in PHP available for download. There are 2 things I would like to accomplish:</p>

<ol>
<li>Require the user to enter a KEY to use it</li>
<li>Make it hard to copy the code and redistribute it.</li>
</ol>

<p>Are these possible in php, if so what resources can I use?</p>
