Question

I am having a problem locating comments for a given user with the following table structure:

usertable (id, userid, name)
comments (id, commentname, date)

Note: usertable.id is not the same as comments.id, and they are both autoincrement

How should I go about updating these tables to fix this problem?

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Update

Is this code good for all users get their own votes when someone voted as thilo savage told me ?

$sth = thumbsup::db()->prepare(
     'INSERT INTO'
    .thumbsup::config('database_table_prefix')
    .'votes_users(vid, userid) VALUES (?,?)');

$sth->execute(array($this->vid, $userid));

Answer 1

EDIT: Rewritten to use many-to-many relationship because current tables can’t be altered.

Create a new table called comments_users with these fields:
cuid (primary key and auto increment) | cid | uid

Then get all of a user’s comments with this code:

    $user_id = '1234';

// get all the user's comment ids from comments_users table
$find = mysql_query("SELECT `cid` FROM `comments_users` WHERE `uid` = '".$user_id."'");

// generate a query that grabs all those comments
$load = "SELECT * FROM `comments` WHERE ";
while ($row  = mysql_fetch_array($find) {
    $load .= "`id` = '".$row['cid']."' OR ";
}

// shop off the last OR
$load = substr($load,0,-4);

// put all the user's comments into comments array
$q = mysql_query($load);
while ($comment = mysql_fetch_array($q)) {
    $comments[] = $comment
}

print_r($comments);

As far as inserting goes, you’ll insert comments into the comments table like you normally would, but then you’d ALSO insert a row into comments_users table filling in the appropriate cid and uid for that comment