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Posted by Jerry Stuckle on 09/28/91 11:16
Mark wrote:
> I would really appreciate some help with this. I am a PHP neophyte, so
> please forgive me...
>
> I am building a site that will be used to display image galleries. Some
> galleries are public (can be viewed without logging on) while others require
> authentication. Logged on users are able to see further galleries that have
> been granted to them by the administrator. Different members are granted
> access to different galleries. For example, member6 can see all
> privategalleries, while member7 can see privategallery3 but not
> privategallery4, and member8 can see privategallery4 but not
> privategallery3. Hopefully you get my drift here...
>
> To control all this I have created several tables.
>
> There is a table called GALLERY that contains information about the
> galleries on the site (Gallery Title, gallery description, path to the
> images etc etc)
>
> There is also a table called MEMBERS that contains (surprisingly)
> information about the members (email address, password, name etc etc)
>
> To control access to the various galleries , I have a table called ACCESS,
> that contains two columns, ACCESSMEMBER that contains the member's ID (which
> is the primary key from the MEMBERS table), and ACCESSTO that contains the
> gallery ID (the primary key from the GALLERY table) that they have access
> to.
>
> When the user logs on, the page that displays the available galleries looks
> up in the ACCESS table to see which galleries they are authorised to see,
> and provides appropriate links to those galleries. (The other pages also use
> this table to look up whether a particular gallery or image can be viewed,
> so sneaky users can't see images by molesting the URLs)
>
> ALL OF THE ABOVE WORKS LIKE CLOCKWORK AND IS NOT THE POINT OF MY POST!!!
>
> The problem comes when I want to provide the ability to edit a users access
> permissions.
>
> I have a form that prints out checkboxes for each of the gallery_ids, that
> looks up the ACCESS table and populates the checkboxes with ticks in the
> gallery checkbox that access has been granted to. So for example, if a query
> to the GALLERY table says there are 10 galleries, it provides 10 checkboxes
> whose names are access1, access2, access3 etc, up to access10. If the query
> to the ACCESS table says that this user is granted permission to gallery3,
> gallery5 and gallery7, these boxes are checked. When the form is submitted,
> these 10 variables are then passed onto the page that updates the ACCESS
> table.
>
> THIS IS WHERE I AM SERIOUSLY STUCK!!! (Sorry it has taken so long to get to
> the point...)
>
> My update page now has these 10 lovely variables. I want to produce a loop
> of some sort that works its way through the variables and updates the access
> table appropriately.
>
> I tried the following (or something quite similar)...
>
> $count=1;
> do{
> if ($access$count=='checked')
> {query_to_insert_record_into_access_table_if_record_does_not_already_exist}
> else
> {query_to_remove_record_from_access_table_if_it_does_exist}
> $count++;
> }while ($count<$number_of_galleries+1)
>
> Obviously it didn't work.
>
> The problem was with the bit where I tried to specify the variable using
> $access$count. I knew it wasn't going to work when I tried it. I'm really
> stuck here. <flatter>I'm sure its quite simple to experts like you
> </flatter>
>
> Any ideas or suggestions?
>
> TIA
>
> Mark
>
>
>
>
>
Mark,
Use arrays.
In your form, assume $gid contains the gallery id:
<input type="checkbox" name="access[]" value="$gid">Gallery <?=$gid;?>
Repeat for each gallery.
Then when you go to process it (assuming the form is POSTed),
$_POST['access'] will be an array containing the id's of the galleries
which are checked (if any).
--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================
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