[TYPO3-core] RFC: #3819: t3lib_div::getIndpEnv('TYPO3_DOCUMENT_ROOT') delivers wrong value in Backend

[Steffen Kamper]

Hi,

this is a SVN patch request.

Type: Bugfix

BT Reference: http://bugs.typo3.org/view.php?id=3819

Branches: 4_2, 4_3, 4_4, trunk

(original description)
When in backend mode, t3lib_div::getIndpEnv() delivers a wrong value 
when asked for 'TYPO3_DOCUMENT_ROOT'. When the root of your 
TYPO3-Installation is e.g. located in /srv/www/htdocs/t3inst/, it 
returns /srv/www/htdocs/t3inst/typo3/.

In my tests i get wrong path when using installation in subdirectory. it 
delivers the apache document root instead of the subdir.

Attached patch is very simple and fixes this. It also works with a 
symlinked installation.

Many other problems are based on this problem, so if this is fixed, some 
problems are solved automatically. let's fix this 4 year old bug!

vg Steffen
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