Question

i am creating form, i found some method called persistData().

I have explored the Zend_Form class but there is no documentation.

I ams curious about its usefulness. Can anyone give me an explanation?

Answer 1

This function – is part of plans for future functionality.

The plan was to use it for persisting data in the session between requests
— which would be useful for multi-page forms. But it was a low priority
feature, so developer placed a stub only; there’s also a test marked incomplete
for it in the test suite.

PROOF LINK