title: Get apache linux user from php
body: <p>I'm on a foreign linux system and need to determine the user that apache runs on (and so does php). </p>
  
  <p>The aim:
  I need to get the owner of the script (this is no problem as I can use SplFileInfo) and compare it to the owner of the apache process.</p>
  
  <p>I'm open to any alternative proposals.</p>
  
  <p>Regards,
  Mario</p>
  
  <p>Edit:
  Additional info:</p>
  
  <p>The script is a thumbnail generator, that uses an XML file to generate thumbs from larger images. The script needs to create folders and write files. As I cannot influence the php configuration and I do not have any shell access, this has to be done very silently. 
  The creation process stopps via exception and sends a mail on failue. As most of php's function cannot throw exceptions on failue, I need some manual checks to determine the environment I'm in. Therefore I need the apache user to compare it to some directory or fileowner.</p>