[BUGFIX] Fix broken phpinfo() section

Due calls to t3lib_div::view_array() which don't work, the section 'phpinfo()' is broken.
Fix it by using the internal method

Change-Id: Iae1388f87c812059161fd87353066e95ebef5b39
Reviewed-on: https://review.typo3.org/30517
Reviewed-by: Francois Suter
Tested-by: Francois Suter