I will try flushing after sessin destroy.By that time following is my code. 1. From php files I am receiving parameter to my perl file through GET. 2. In Perl File – It is multiple form almost 4 four pages On every page submit session_start functions check for whether session exists or not .If, yes then it reinitialize else create new. So, on page 1 it creates new session id and till I submit my page session Id is saved as hidden field in form and it propagate from one page to last page and I keep on initialing it. It a huge code I cann’t paste here these are the lines in my code to start and destroy the session.

my $q=new CGI;
my %KVP=$q->Vars;

$id=KVP{'sessionid'}) //post hidden variable 

$session=&session_start($q,$id);
$sessionid=$session->id;
.
.
.

if($session)
{
    session_destroy($session);

    //This doesn’t empty the cgisess_ var in /tmp
}

sub session_start()
{
  my($cgi,$session_id)=@_;

  if($session_id eq '')
  {
    #create new session
    $session = new CGI::Session(undef, $cgi, {Directory=>'/tmp/'});
  }
  else
  {
      #reinitialse with session with session id
    $session= new CGI::Session(undef, $session_id, {Directory=>'/tmp'}
+)
  }
  return $session;
}


sub session_destroy()
{
    my($session)=@_;
    $session->delete();
}
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This is what i understand from myself and tried to implement it on my project. If you find something is not good practice or this thing can be done in more efficient way . Kindly advice me on it also. Thanks .