TYPO3 Core

Many extensions using substituteMarkerArrayCached will fail in 4.3 as the function changed. All arguments has to be an array, otherwise you get following error:

Catchable fatal error: Argument [2,3,4] passed to tslib_cObj::substituteMarkerArrayCached() must be an array, null given

Thanks for Steffen Kamper for reporting. After some discussion in the -dev list, the idea came up to keep the type hinting but to allow the special case "null" (also uninitialized variable) to keep older extensions happy.

(issue imported from #M9533)