<?php $retorno = `ls -l /`; echo $retorno;
Standard input is empty
total 48 drwxr-xr-x 2 root root 4096 Jul 21 2015 bin drwxr-xr-x 4 root root 4096 Jul 21 2015 dev drwxr-xr-x 69 root root 4096 Jul 22 2015 etc drwxr-xr-x 3 root root 4096 May 14 02:15 home drwxr-xr-x 10 root root 4096 Jul 21 2015 lib drwxr-xr-x 2 root root 4096 Jul 21 2015 opt dr-xr-xr-x 175 root root 0 Mar 28 19:21 proc drwx------ 3 root root 4096 Jul 21 2015 root drwxr-xr-x 2 root root 4096 Jul 21 2015 sbin drwxr-xr-x 2 root root 4096 Jul 21 2015 sys drwxr-xr-t 5 root root 4096 May 14 02:15 tmp drwxr-xr-x 10 root root 4096 Nov 9 2015 usr drwxr-xr-x 7 root root 4096 Jul 22 2015 var