find friends who also tweet this - php

Question

I'm working out a social tool like twitter, but I got stuck on "who also tweet this twitter."
There's a list of twitters on my page, and I wanna display who also tweeted this for each tweet.
I'm using MySQL + php + Smarty.
Here's the code:
/* ---- php ---- */
// Get twitters that tweeted over 200 times.
$sql = mysql_query("SELECT id, content, user, tweets FROM twitter_list WHERE tweets > '200'");
$twitter_array = array();
while($tweet_row = mysql_fetch_array($sql)){
array_push($twitter_array, $tweet_row);
// Get the users who tweeted these twitters.
$twitter_id = $tweet_row['id'];
// Find out 5 friends who also tweeted this twitter. twitter_relation stores who tweets what.
$friends_who_also_tweet = mysql_query("SELECT tid, twitter_id, user_id FROM tweet_relation WHERE twitter_id = '$twitter_id' ORDER BY tid DESC LIMIT 5");
$friends_who_also_tweet_array = array();
while($friends_who_also_tweet_row = mysql_fetch_array($friends_also_tweet_array)){
array_push($friends_who_also_tweet_array, $friends_who_also_tweet_row);
}
if($friends_who_also_tweet_array){
$sm->assign("fwat", $friends_who_also_tweet_array);
}
}
if($twitter_array){
$sm->assign("twitter", $twitter_array);
}
$smarty->display('twt.html');
/* ---- HTML: twt.html ---- */
...
{section name=twitter loop=$twitter}
<div class="content">{$twitter[twitter].content}</div>
<div class="who_also_tweet">
{section name=who loop=$fwat}
<div class="i_also_tweet">{$fwat[who].user_id}</div>
{/section}
</div>
{/section}
I wish to get the array of twitter, and for each twitter, retrieve the 5 users who tweets it. But it only display the first twitter's users, I suspect while() might be wrong but cannot find it out. Anyone could lend me a hand? Many thanks.

Answer 1

$twitter_array = array();
then:
if($twitter_array){
$sm->assign("twitter", $twitter_array);
}
You never added anything to that array. I'm assuming you mean to do it here (since $tweet_array is never declared):
array_push($tweet_array, $tweet_row);
In fact, this variable also gets assigned and then never referred to as well:
$friends_who_also_tweet
Your variable naming is really confusing, and I think it may be contributing to your problems.
Edit: Also, why do you assign this with every iteration of the first While loop? It is just going to overwrite the previous values:
if($friends_who_also_tweet_array){
$sm->assign("fwat", $friends_who_also_tweet_array);
}