I agree with both Peter and Mengü, in a manner of speaking. Assuming you want
visitors to return, I think it's best to use sessions and cookies so that
they're not served the same image twice. Passing that information between pages
is easy with Peter's method. Mengü's technique (albeit slightly altered) would
work well at storing that information for future use.
Storing this information is *very* important. If users keep seeing the same
images, they won't return.
Edward Dudlik
Becoming Digital
www.becomingdigital.com
----- Original Message -----
From: "Peter Beckman" <beckman@purplecow.com>
To: "Matthew Horn" <mhorn@macromedia.com>
Cc: <php-db@lists.php.net>
Sent: Wednesday, 28 May, 2003 10:29
Subject: Re: hotornot functionality
Uh, why not just do this:
<input type='hidden' name='lastid' value='1930'>
Then on the next page, you can get the id. Or geez, it's gonna be there
anyway -- after you do the insert/update of your vote, just pass that ID to
the function that displays the page.
function display($x) {
if (!empty($x['vote'])) {
db_query("insert into vote (pid,vote) values
(".$x['thisid'].",".$x['vote'].")");
}
$r = db_query("select * from pictures order by rand() limit 1");
$row = mysql_fetch_array($r); // sure, do error checking if you want
beginpage($x['thisid'],$x['vote']);
votebar($row['pid']);
echo "<img src='".$row['imgurl']."'>";
endpage();
}
assuming beginpage is responsible for displaying the last image you voted
on.
Peter
On Wed, 28 May 2003, Matthew Horn wrote:
> I am toying with the idea of implementing functionality similar to the
hotornot.com site -- for a different purpose, mind you, but the same kind of
user experience. Here's what it does:
>
> 1. A picture is served up.
> 2. User clicks on a radio button scale from 1 to 10 to "rate" the picture.
> 3. The page refreshes. The rating is re-computed with the user's rating for
the original picture. The original picture becomes that "last rated" pic, and a
new one is served up.
> 4. The user can cycle through as many pictures this way as they want.
>
> I have MySQL and PHP to work with.
>
> What I am trying to do is figure out the best approach to implementing it.
Specifically, when the user clicks on the radio button, that triggers the form
submit via JavaScript. The form submit updates the database with the rating and
then fetches the next row.
>
> The problem that occurred to me as I was putting together a prototype is:
>
> I don't want the user to get the entire result set of all the images in the
database at once. I really want them to get just the two images (the one they
just rated and the one they are about to rate). Is there a way to "remember" the
last row they selected and then use that number to fetch the next one on the
subsequent request? I can keep recycling hidden form fields with a number, which
should work ok, but the problems come up when they reach the last row.
>
> Anyway, just looking to see if you folks have some ideas. I would prefer to
roll my own rather than use one of the available "hotornot-style" PHP scripts to
do this.
>
> --------
>
> Matthew J. Horn
>
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