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Top Forums Web Development How do I verify my web visitor is still online Post 302277028 by angheloko on Thursday 15th of January 2009 07:39:37 AM
Old 01-15-2009
Hi heman007,

I agree with otheus. Additionally, checking the IP of the user's machine would probably be only possible and practical on intranets. User's accessing your site from a computer shop will all have the same IP.

Like what otheus said, set your cookies "expires" property. In your table you'll have a column, say 'LastAccess', which updates everytime a user does something in your site (like clicking a post).

You must then have a script at the server-side that regularly checks the LastAccess field vs. the current time. If the difference exceeds a certain threshold (which translates to inactivity of the user) then you can delete or flag that record. Normally, the threshold will be equal to the value of the "expires" property of the cookie.
 

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Tree::Simple::Visitor::VariableDepthClone(3pm)		User Contributed Perl Documentation	    Tree::Simple::Visitor::VariableDepthClone(3pm)

NAME
Tree::Simple::Visitor::VariableDepthClone - A Visitor for cloning parts of Tree::Simple hierarchy SYNOPSIS
use Tree::Simple::Visitor::VariableDepthClone; # create an visitor my $visitor = Tree::Simple::Visitor::VariableDepthClone->new(); $visitor->setCloneDepth(3); # pass our visitor to the tree $tree->accept($visitor); my $partial_tree = $visitor->getClone(); DESCRIPTION
This visitor will clone METHODS
new There are no arguments to the constructor the object will be in its default state. You can use the "setNodeFilter" method to customize its behavior. includeTrunk ($boolean) Based upon the value of $boolean, this will tell the visitor to include the trunk of the tree in the traversal as well. This basically means it will clone the root node as well. setCloneDepth ($number) setNodeFilter ($filter_function) This method accepts a CODE reference as its $filter_function argument and throws an exception if it is not a code reference. This code reference is used to filter the tree nodes as they are cloned. visit ($tree) This is the method that is used by Tree::Simple's "accept" method. It can also be used on its own, it requires the $tree argument to be a Tree::Simple object (or derived from a Tree::Simple object), and will throw and exception otherwise. getClone This method returns the cloned partial tree. BUGS
None that I am aware of. Of course, if you find a bug, let me know, and I will be sure to fix it. CODE COVERAGE
See the CODE COVERAGE section in Tree::Simple::VisitorFactory for more inforamtion. SEE ALSO
These Visitor classes are all subclasses of Tree::Simple::Visitor, which can be found in the Tree::Simple module, you should refer to that module for more information. AUTHOR
stevan little, <stevan@iinteractive.com> COPYRIGHT AND LICENSE
Copyright 2005 by Infinity Interactive, Inc. <http://www.iinteractive.com> This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.10.1 2005-10-24 Tree::Simple::Visitor::VariableDepthClone(3pm)
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