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not sure what you are asking... it will give you the last post of the last unread topic...
if you want the last post of the first unread topic (what I said I would want)... change this line
$redirect = sp_permalink_from_postid(spdb_table(SFTOPICS, 'topic_id='.end($saveUser->newposts['topics']), 'post_id'));
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Well, what I need is: the first unread post of each topic.
If I never read a topic it drive me to first post, if I read partially it drive me to the first post that I didn't read.
This should be the normal behavior for each topic.
My english is terrible, I know, my apologies, hope that now it's more clear.
Thanks for your patience
Hakuna Matata
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first unread post of each topic??? how do you want to load multiple topics?? yes, just getting confused... 
did you even try my code?
how about just loading the list of unread topics??? as if you had clicked on that button mentioned earlier?
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Mr Papa said
first unread post of each topic??? how do you want to load multiple topics?? yes, just getting confused...
did you even try my code?
how about just loading the list of unread topics??? as if you had clicked on that button mentioned earlier?
Yes, I see that I created confusion, apologies.
And yes, I tried your code, it works well for meaning you conceived but it's not what I need 
I try again to explain me better with this scenario:
1) I go in forum page and see list of topics
2) I click in one topic's title and
3) the list of posts that appears, starts with the first post that I didn't read (like if use a permalink to that post).
Simple as that
Hope it's more clear now 
Hakuna Matata
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now I just struggle with the use case... cannot image how that could be enjoyable user experience...
are you using the unread post list at the bottom of group view?? you users should already see a list of their unread topics... not every post, but a list of topics and the number of unread in each of those topics... then can click and go to that topic...
making that topic expand to a list of posts would be a significant change to core code... and not sure of the worth... each link would take you to the same topic and 99% of the time, the same page in that topic...
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I think what Marco is asking for Steve is the old chestnut of a list of all topics for all users with a 'bookmark' to show how far they have read through each one.
I will say my usual piece. If someone has a good, workable, efficient model they can show me then we would consider it but at the moment the sheer quantity of data required for even quite a small forum could be enormous.
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YELLOW
SWORDFISH
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Ok, now I understand why this feature isn't implemented by default: you just didn't experienced it as user.
In some major forum software like Simplemachines, PHPBB and VBulletin too, this is the normal behavior: you click on thread title and go automatically to the first post that didn't read, indipendently if there are other methods to see unread posts or threads and I can assure you that this is very comfy.
Not all user have organized mind and rely on list of unread posts, many of them simply browse between topics and click on title that, for some motivation, awakes their attention and, doing that, if they already partially read that topic in the past, the better experience of use it's to be addressed to the first unread post, not the first, not the last one.
So I want to ask you, if I take off the topics update dropdown menus (to make interface cleaner, for example) how can I reach the last unread post?
As there is a customized list for each user that shows which are the topics that user didn't read, it means that somewhere it's already memorized this information, right? so, should be so difficult to connect it to thread's title?
Anyway, if it's so difficult, I don't want waste your time, this is a really comfy feature but you are not obliged to add it, of course.
I think that SP it's a good forum, I insisted with client to switch to it, loosing many material of previous SMF one, like attachments, shortcodes and so on, because I rely on it and on your support, but there are some little refines that could make it even better and I advice which ones, IMHO.
In WP panorama SP it's the best, other forums are not forum but Bulletin Boards, like BBpress, nothing to compare, but all is perfectible 
Thanks a lot for your time
Marco
Hakuna Matata
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Let me ask you a question (related to my comment in post 16 above).
Let's say you display 15 posts of a topic per page. A user starts reading at the top of the page and reads, say, 6 of the posts before moving to a different topic. How can we possibly determine how many of the posts on that page were actually read and how many were left to be read? Because I have no idea how that would be remotely possible.
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YELLOW
SWORDFISH
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Yellow Swordfish said
Let me ask you a question (related to my comment in post 16 above).Let's say you display 15 posts of a topic per page. A user starts reading at the top of the page and reads, say, 6 of the posts before moving to a different topic. How can we possibly determine how many of the posts on that page were actually read and how many were left to be read? Because I have no idea how that would be remotely possible.
It's easy: registering the movement of eyes and thoughts of user, need only a good brain scanner 
Seriously, I'm sure that you can find a better solution but this is my idea, using cookies, I made a little flow chart, hope it make sense.
Thanks
Marco
Hakuna Matata
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This is not actually possible. There are very strict limits to both how big cookies can be and how many one domain can store. You also have to remember that when a domain is requested by the user - all of the cookies for that domain are passed in the http header - one very good reason for limiting how many can be created.
If one wanted to try and follow this model then a better solution would be to use the local storage engine capability that is a part of the html5 specification and is supported on all major browsers. That might be worth investigating. Not - I hasten to add - that such a process would be simple and easy to implement.
One of the main problems with both cookies and local storage of course, is that they are only retained on the device being used at the time. Like perhaps most people these days, I surf the web using my laptop, my iPad and my mobile phone and neither cookies nor local storage are transferable between devices so the resulting behaviour from one device would not be echoed when I looked at the same page on a different device.
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YELLOW
SWORDFISH
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