How to deny the use of dangerous PHP functions?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/1865020/php-how-to-disable-dangerous-functions">PHP: How To Disable Dangerous Functions</a>  </p>
</blockquote>



<p>Hi, this is my situation: I must let my clients enter PHP code, but only safe functions like string function, date function etc. So I need the danger PHP functions list to remove them by using string replace before save to PHP file. Any suggestion?</p>
