unlink() is a function for file system handling.
It will simply delete the file in context.
Unset () is used to destroy a variable in PHP. In can be
used to remove a single variable, multiple variables, or an
element from an array. It is phrased as Unset ($remove).
Also Known As: Unset Variable, Destroy Variable
how to maintained the session from one page to another page
based on the url and then entered into the first page is
logging into instead of secondpage it goes to the another
url.ie first login session togoes to the one url and next
login session it goes to another url
how is it possible in php
please give me answer in that question