[TYPO3] EXT development: How to set 'cache_clearAtMidnight'?

[Martin Bless]

I'm working on an extension that's supposed to insert a 'Citation Of
The Day' on a page. It's mainly a frontend plugin.

Q: How can I make sure in my PHP code, that caching of pages
containing this plugin ends at midnight?

I'd like to have the effect of
   # page.config.no_cache = false
   # page.config.cache_period = 86400
   # page.config.cache_clearAtMidnight = true
for the affected pages only.

Please, can somebody give me a hint or a pointer?

Thanks, and: Have a nice day!

Martin

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