Display different results on different page/profiles - mysql

Question

I dont know if I lost the information in my brain, or if I never had it, but I have created a tweet so a user can follow other users.
The problem now is that every user display the same information.
I Was trying to add WHERE $_SESSION['uid'] to my query but that doesn't help do the trick.
Still shows the same info.
Any tips ?
<?php
foreach(fetch_follotweets() as $tweet){
echo $tweet['firstname'];
echo $tweet['lastname'];
echo $tweet['username'];
echo $tweet['date'];
echo $tweet['profile_img'];
$tweet['message'];
}
function fetch_follotweets(){
global $db;
$query = $db->query(" SELECT
user.email,
user.username,
tweets.message,
tweets.date,
userdetails.profile_img,
userdetails.firstname,
userdetails.lastname,
following.id,
following.user_id,
following.follow_id
FROM user
JOIN userdetails
ON user.id = userdetails.user_id
JOIN tweets
ON userdetails.user_id = tweets.user_id
JOIN following
ON following.follow_id
WHERE following.follow_id = tweets.user_id AND
user.id='{$_SESSION['uid']}
ORDER BY tweets.date DESC");
$tweet = array();
while(($row = $query->fetch(PDO::FETCH_ASSOC)) !==FALSE) {
$tweet[] = $row;
}
return $tweet;
}
?>

Answer 1

Without the WHERE clause, the SQL would get the details of all the users
Also, I think that the JOIN on tweets & following should be a LEFT JOIN ( to get the records even if none of them is present )
SELECT
user.email,
user.username,
tweets.message,
tweets.date,
userdetails.profile_img,
userdetails.firstname,
userdetails.lastname,
t.ids_of_users_followed
FROM
user
JOIN userdetails
ON user.id = userdetails.user_id
LEFT JOIN (
SELECT
GROUP_CONCAT( following.follow_id ) AS ids_of_users_followed
following.user_id
FROM
following
GROUP BY
following.user_id
) as t ON ( t.user_id = user.id )
JOIN tweets
ON ( userdetails.user_id = tweets.user_id OR FIND_IN_SET( tweets.user_id, t.ids_of_users_followed ) )
WHERE
user.id = :? => Make sure to add the logged in user_id here
ORDER BY
tweets.date DESC