how to create php scheduled process?
<p>I was asked to create an web apps that will send updates to user for certain time.</p>

<p>for example</p>

<ol>
<li>user1 asking for updates every 5 minutes from June - August 2009 </li>
<li>user2 asking for updates every 10 minutes for today only  </li>
<li>user3 asking for updates every 1 day from june - august 2009</li>
</ol>

<p>I have no idea how to automatic the background process ... should I add to cron ?
can cron works on windows server (apache on windows) ? </p>
