I had a problem for intialisation of session variable ...

the problem descibed was as follow

"Suppose I book an order at rainola.com and confirm it.

I then go to some other website.

After that I revisit rainola.com and click on “send order”
button on top horizontal bar.

I can see details of my previous order in
order table."

Please suggest me solution for this

You could use cookies as well as session variables, whenever the session gets updated update the cookies, and if now session variables and yes cookies, update the session variables with whats in the cookies.

assuming that the objective required is "user should not see the same order upon returning to the ordering website"....

Solution =
1) Identify landing page.
2) Reset session if its a landing page.

Now...
how do you know if its a landing page...
1) Check PHP_referer
.....a) str replace http:// with ''(blank)
.....b) str_replace www. with ''(blank)
.....c) match domain with current domain
2) If match then..nothing...else reset session...destroy > recreate.