title: Don't wait for the process to exit
body: <p>I have a PHP script that is called from a cron job every minute. This script takes some info from the database and then calls another PHP script using the System function (passing it some parameters).</p>
  
  <p>That means that I can start up to 10 scripts from this "main" one. And what I would like to do is that I would call the script and continue the execution of the main script, that is, not wait for the System call to complete and then call the next one. </p>
  
  <p>How can this be done?</p>