title: Zend Guard vs. ionCube
body: <p>I've developped a php script and I want to protect my files, so what do you think is the best choice for doing this.</p>
  
  <ul>
  <li>ionCube starting from 199$</li>
  <li>Zend Guard 800$</li>
  </ul>
  
  <p>Is there any other cheaper tools or even free ?</p>