[TYPO3-dev] TCA Backend Input form Validation

[Satish Maurya]

Hi All,

I have development an extension in TYPO3 6.1 and created TCA backend input
form. In this form I have added fields those require to Admin update/change
the value.

I have field Status and in this field added three select values:

- Under Review
- Accepted
- Rejected

I need to send an email to someone if admin change the status as "Accepted"
but I am not sure where I need to write the code and also I want to
understand from where I can get backend TCA form posted data.

Can anyone please help on this?

Also, I need to validate Start and End date . I mean, End date should not
be less than Start date.



Thanks
Satish Maurya