[TYPO3-core] RFC #16832: Bug: error when using t3lib_TCEmain->clear_cacheCmd in frontend

[Xavier Perseguers]

Hi Steffen,

> i investigated this issue, and it's nonsense to call tcemain from FE as
> this is not intended to do so.
>
> Clearing cache in FE is possible as it's built in. The only senseful is
> clearing page cache, configuration cache or rte cache is not allowed
> from FE context.
>
> To clear cahce in FE there are two functions available:
>
> $GLOBALS['TSFE']->clearPageCacheContent() <= clears all page cache
> $GLOBALS['TSFE']->clearPageCacheContent_pidList($pidList) <= clears
> cache of pages for given uid's

What is missing though is a way to _automatically_ respect pageTS 
TCEMAIN.clearCacheCmd instructions. As more and more extensions allow 
users to change their records from frontend whereas this was back then 
only thought to be done from backend (or with a logged-in BE user, it's 
the same for me), we have a lack of support of this very useful way of 
clearing cache of some pages upon record update.

Cheers
Xavier