Question

Everytime a user reads a post, it assigns a cookie, eg.

set_cookies($id,'read',60*60*24);

But the problem is how do i select all the posts that hasn’t been read by the user?

SELECT * from posts where (post is unread)

It doesn’t require a login. Table structure:

ID | Content | Category

Answer 1

With your solution, you’d do something like this:

$ids = array();
if (isset($_COOKIES)) {
    foreach ($_COOKIES as $cookie => $value) {
        if (is_numeric($cookie) && $value == 'read') {
            $ids[] = $cookie;
        }
    }
}

if (isset($ids[0])) {
    $posts = implode(',',$ids);
    $query = "SELECT * from posts where id in ({$posts})";
    // Do the query
} else {
    // no read posts.
}

But you should really look into storing your read variables differently.