Function getDirectorySize

Returns the size of a directory. AKA the combined filesizes of all files within it. Note that this function uses filesize(). There could be problems with files that are larger than 2GiB

Package: Core\Backend
Copyright: four for business AG <www.4fb.de>
License: http://www.contenido.org/license/LIZENZ.txt
Author: Willi Man, Timo Trautmann
Located at includes/functions.file.php

Parameters summary
`string`	`$sDirectory`	The directory
`boolean`	`$bRecursive = false`	true if all the subdirectories should be included in the calculation

Return value summary
`boolean`	int false in case of an error or the size