[TYPO3-core] RFC #16177: Add DB structure update pre-processing hook in EM

[Xavier Perseguers]

Hi,

>> The hook has a break in the for loop. This means that the hook will be
>> executed only for the first extension and not for the others.
>
> I think the idea is that each hook will have its own rendering and
> processing time, one after the other. So first you see the "form" for
> the first hook caller, then you submit it, do stuff, until that first
> hook is "satisfied" and no longer outputs anything, then the second hook
> will be called. This would avoid a mix of different forms or "wizards"
> on the same page.

Exactly!

Cheers
Xavier