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-   vB3 Programming Discussions (https://vborg.vbsupport.ru/forumdisplay.php?f=15)
-   -   cross linking two arrays ? (https://vborg.vbsupport.ru/showthread.php?t=49394)

fla5h 02-26-2003 05:57 PM
cross linking two arrays ?
 
Can someone help ?

I'm trying to write good code, keeping queries to a minimum etc.

What I want to do is take a query which returns an array, then you do a while loop to cycle through the array.

Is there anyway to crossreferece this with another array without putting it into the loop ?

Lets post an example, it will probably help, lol

If you take the karma hack, usercp bit.

PHP Code:

// ############################### start karma ###############################

if($karmaenable==1) {

    $karmas=$DB_site->query("SELECT karma.postid as postid,karmapos,karmaneg,reason,post.threadid as threadid,post.dateline as dateline,thread.title as title FROM karma LEFT JOIN post ON karma.postid=post.postid LEFT JOIN thread ON post.threadid=thread.threadid WHERE karma.userid='$bbuserinfo[userid]' ORDER BY timestamp DESC LIMIT 0,5");

    $uk=$DB_site->query_first("SELECT karma FROM user WHERE userid='$bbuserinfo[userid]'");

    $haskarma=0;
    while($karma=$DB_site->fetch_array($karmas)) {

        if ($karma[karmapos] > $karma[karmaneg])
            $karmaposneg="karmapos.gif";
        else if ($karma[karmaneg] > $karma[karmapos])
            $karmaposneg="karmaneg.gif";
        else
            $karmaposneg="karmabalance.gif";

        $karma[timeline]=vbdate($timeformat,$karma[dateline]);
        $karma[dateline]=vbdate($dateformat,$karma[dateline]);

        $karma[reason]=bbcodeparse($karma[reason]);

        if (strlen($karma[title]) > 25)
            $karma[title] = substr($karma[title],0,23)."<smallfont>...</smallfont>";

        eval("\$karmacommentbits .= \"".gettemplate("karma_usercpcommentbits")."\";");
        $haskarma=1;

    }

    if ($haskarma==1)
        eval("\$karmacomments = \"".gettemplate("karma_usercpcomments")."\";");
    else
        eval("\$karmacomments = \"".gettemplate("karma_usercpnocomments")."\";");
} 
if I altered this line

PHP Code:
$karmas=$DB_site->query("SELECT karma.postid as postid,karmapos,karmaneg,reason,post.threadid as threadid,post.dateline as dateline,thread.title as title FROM karma LEFT JOIN post ON karma.postid=post.postid LEFT JOIN thread ON post.threadid=thread.threadid WHERE karma.userid='$bbuserinfo[userid]' ORDER BY timestamp DESC LIMIT 0,5"); 
to this

PHP Code:
$karmas=$DB_site->query("SELECT karma.postid as postid,karmapos,karmaneg,reason,post.threadid as threadid,post.dateline as dateline,thread.title as title,whoadded FROM karma LEFT JOIN post ON karma.postid=post.postid LEFT JOIN thread ON post.threadid=thread.threadid WHERE karma.userid='$bbuserinfo[userid]' ORDER BY timestamp DESC LIMIT 0,5"); 
this would return the

$karmas[whoadded] who return the array
$karma[whoadded] who return the id's one by one in the while loop

What if I wanted to return the username of the user.

I would have to do something like

PHP Code:
$DB_site->query("SELECT username FROM user WHERE userid=$karmas[whoadded]); 
hoo would I link these two queries together so in the while loop I can call

$karma[whoadded] = userid
$karma[username] = username

I hope I have explained this, can anyone help please ?

Am I right I can do this using 2 queries ?

fla5h 02-27-2003 02:16 PM
Sorry to bump this thread, but do I take it that its not possible

Or I have not described what I need very well ?

Can anyone comment even if its not the total solution ?

Thanks :)

Nomb 02-27-2003 04:46 PM
I think I understand what you want, take a look at this:

PHP Code:
$karmas=$DB_site->query("SELECT karma.postid as postid,karmapos,karmaneg,reason,post.threadid as threadid,post.dateline as dateline,thread.title as title,whoadded,user.username 
                FROM karma, user 
                LEFT JOIN post ON karma.postid=post.postid LEFT JOIN thread ON post.threadid=thread.threadid 
                WHERE karma.userid='$bbuserinfo[userid]' AND user.userid='$bbuserinfo[userid]'
                ORDER BY timestamp DESC LIMIT 0,5"); 

Nomb 02-27-2003 05:42 PM
Actually, looking back and re-reading this ... I don’t think you need to do this whole "whoadded" thing at all.

Use the same code I posted above but remove the whoadded from the first line.

Now use these:

$karma[userid]

$karma[username]

* Note: It’s karma, not karma(s)

fla5h 02-27-2003 05:45 PM
Nomb, thanks for the reply.

Looking at your post, is this correct ?

When it queries the user table, I was after the username WHERE userid = $whoadded

that would return the usernames of the people who gave me karma ?

But am I able to do the query in this way as it wont know what whoadded is until its run ?

Any ideas ?

fla5h 02-27-2003 06:05 PM
just seen your reply, I dont want my username, as in User=$bbuserinfo[username]. I want the usernames of the users that gave me karma.

their id's are collected in the whoadded column

Can you suggest what i do ?

Thanks for all your help so far :)

Nomb 02-27-2003 06:21 PM
O, ok, I didn't know what the hell this hack was lol.

Um ... you're gonna need two queries then because you have two different WHERE conditions.

Pretty sure.

fla5h 02-27-2003 06:37 PM
yep, but do you know how I need to do it ?

If I do the first query I'll get the karma details and the userid of the person who donated the karma.

Then I need to do another query to get the usernames for the user id's

But how do I then combine them ?

Before I put them into the mysql_fetch_array ?

Nomb 02-27-2003 07:12 PM
How are userid's stored in the whoadded row?

Like this: 6,4,9,18 ?

fla5h 02-27-2003 07:53 PM
it will only be one number in each individual row.

I would guess so anyway.

only one person can add karma to every karma id


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