[TYPO3] Strange Warning: Invalid argument supplied for foreach() in...

[Katja Lampela]

Thanks kiitos Tapio!
-katja

Tapio Markula kirjoitti:
> Katja Lampela
>> Hi all,
>>
>> I was trying to check why installing the extension "Differentiated 
>> formmail recipients" (julle_diffformmailrcp) caused the front end go 
>> completely blank and I enabled in the install tool the sglDebug and 
>> displayErrors.
>>
>>
>> After de-installing the extension everything went back to normal and 
>> I also compared the tables and everything is fine according to the 
>> install tool.
>>
>> Now - the error displaying still on, the weird thing happens: I get 
>> this error message in the left BE frame top everytime I hit "Clear 
>> cache in typo3conf":
>>
>> *Warning*: Invalid argument supplied for foreach() in 
>> */home/mydomain.com/html/typo3conf/temp_CACHED_ps4f0f_ext_tables.php* 
>> on line *2675*
>
> these kinds of warnings are not serious - just warnings.
> Foreach expects to have multilevel array or single level array, which 
> key value has been saved
>
>> Everytime I hit "Clear FE cache" the error disappears and stays away 
>> until I hit the "Clear cache..." again.
>
> happens in some situation - in some situation the handled variable is 
> no t handled properly.
>>
>> Is this something I should worry and any idea what could cause this?
> Usually those don't cause functionality failures. In order to avoid 
> them around foreach loop could be conditions to check that foreach 
> handles a proper array.