[TYPO3-core] RFC #14280: Bug: simple value cannot overwrite array value in "t3lib_div::array_merge_recursive_overrule"

[Christian Kuhn]

Hey,

Mikkel Ricky wrote:
> Problem:
> Only array values can overwrite array values in 
> "t3lib_div::array_merge_recursive_overrule", i.e. if the first array 
> contains a key with an array value and the second array contains the 
> same key with a simple value then the value of the key in result will be 
> the array value from the first array.

Thanks for your RFC! By reading, two things came to my mind:
- The method should be covered by unit tests, this RFC is a good 
opportunity to add them.
- We need to make sure that no existing code relies on the current 
behavior, otherwise we could easily introduce some bugs that might be 
hard to find later on.

Regards
Christian