[TYPO3-dev] Reading FlexForm data from processDatamap_preProcessFieldArray hook

[Steve Webster]

Hi All,

I am developing an extension where I want to manipulate the contents of 
my FlexForm in the processDatamap_preProcessFieldArray hook.  E.g. when 
someone clicks the save button I want to also write a local XML file 
before writing to the DB.

I can manipulate the $incomingFieldArray manually and pull the data out 
but I really wanted to use one of the built in methods to do this for 
future proofing.  Is there any static methods I can use, the only ones I 
can find are within tslib_pibase and therefore need to be instantiated 
first?

Thanks,

Steve.