php: keyword lookup
<p>I'm looking for a little php script that looks up keywords in a mysql table and gives the response, based on the most matching keywords. 
For example:</p>

<ul>
<li><p>imput:who are you </p></li>
<li><p>mysql table: KEYWORDS:who,you RESPONSE: I'm a robot</p></li>
<li><p>script returns: I'm a robot</p></li>
</ul>
