[CLEANUP] Initialize variables and fix invalid function calls

* Initialize some uninitialized variables
* Fix invalid argument count on function calls
* Fix case typo in function call
* Fix some phpdoc issues

Resolves: #79865
Releases: master
Change-Id: I4e41940d849daa818735f75169e7cc686ee908c9
Reviewed-on: https://review.typo3.org/51725


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>