take userid and store it in session variable.. when a user purchases prod

I have one application, one user purchase some products in
my application? and another person came he is also purchase
some products?how can we identify which user purchase which
items?
my answer is by using session id? but i dont know how? can
u give me programming for that?

Question Posted / nidhi

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Answer Posted / nidhi

take userid and store it in session variable.. when a user
purchases product store product details along with session
(userid) in database or an xml file and when u want to
retrive fetch from it.

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