namei -m /home/agent/work/www/index.php
f: /home/agent/work/www/index.php
 drwxr-xr-x /
 drwxr-xr-x home
 drwxr-xr-x agent
 drwxr-xr-x work
 drwxr-xr-x www
 -rw------- index.php

Here is the output of:
grep agent /etc/apache2/sites-available/default 
 DocumentRoot /home/agent/work/www/
 <Directory /home/agent/work/www/>