title: Apache running as nobody, but whoami shows "root" or my user name
body: <p>the problem is that I <code>used ps aux | grep apache</code> which says the apache is running as nobody.
  But then I used <code>exec("whoami")</code>, it gives a different result: root or gt. It depends on the owner of the script. If the script is owned by <code>root</code>, whoami is <code>root</code>; if owned by <code>gt</code>, then whoami is <code>gt</code>.
  I also checked httpd.conf, the apache user is nobody, group is nobody.</p>
  
  <p>So could anybody explain this thing?</p>
  
  <p>Thank you!</p>