cross linking two arrays ?

[fla5h]

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.



// ############################### 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


$karmas=$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


$karmas=$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

$DB_site->query("SELECT username FROM user WHERE userid=$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]

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]

I think I understand what you want, take a look at this:


$karmas=$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]

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]

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]

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]

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]

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]

How are userid's stored in the whoadded row?

Like this: 6,4,9,18 ?

[fla5h]

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

[Nomb]

I thought you said whoadded contained the user id's of those people that have added karma to you (you meaning your userid aka $bbuserinfo[userid]).

?

If you're unsure browse the karma table via phpmyadmin and see what is contained in the whoadded row for your userid.

[fla5h]

mmm, I'll try to explain this as best as I can, cos I still new at this.

on every row of the karma table, the whoadded column has one value.

But because the querie asks for the first 5 rows in the table that contain my userid , this would return an array of 5 userid's from the whoadded rows ?

This is correct aint it ?

Then with these 5 user id's I want to find out what their username is.

So in the mysql_fetch_array loop I can add the username variable in their.

I can therefore in the usercp, instead of just showing the karma and the comment I can show the username of the person who gave it to me.

That make sence ?

Thanks for your continuing help :)

[fla5h]

Bump ?

[fla5h]

Tis ok now I sussed it :D