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How to get all cached keys with certain prefix from the Cache in Laravel?

Is there a way in newer laravel versions to cache many things with a certain prefix and then get all by doing Cache::get(‘prefix_*) or something ?
I’m trying to cache the Online Users for like 5 minutes and I want the cache to expire for each user individually, unless the expiration is updated for it by using a middleware.
But the problem I have run into is that I can’t retrieve all users if I store them as individual Keys:

 Cache::put('online_users_'.auth()->id(), auth()->user(), now()->addMinutes(5));

And I would like to get them by using something like :

Cache::get('online_users_'); or Cache::get('online_users_*');

I could try using tags for this problem , but as they are not even explained in the docs after laravel 10 , I was wondering if there is another way around this , that would allow for the individual keys to expire in their own and be individually stored.
Thanks.

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2

Answers


  1. Chosen as BEST ANSWER
    0

    I would appreciate a solution for the file driver ,but I managed the following using the REDIS driver ,to get all the keys and values based on the prefix online_user_*:

     public function index()
    {
        $cursor = '0';
        $onlineUsers= [];

        do {
            [$cursor, $keys] = Redis::scan($cursor, 'MATCH', 'online_user_*');

            foreach ($keys as $key) {
                $onlineUsers[$key] = Redis::get($key);
            }
        } while ($cursor !== '0');

        return view('view.name', [
           
            'onlineUsers' => $onlineUsers,
        ]);
    }

    I also had to remove the prefix from database.php

     // 'prefix' => env('REDIS_PREFIX', Str::slug(env('APP_NAME', 'laravel'), '_') . '_database_'),

  2. 0

    Since your idea is to put all "online users" in the same cache, you can do it like this:

    Cache::put('online_users', [auth()->id() => auth()->user()], now()->addMinutes(5));

    This essentially creates a key:value array inside your online_users cache.

    Now, when you try to get the records from the cache:

    Cache::get('online_users');

    You would get data like this:

    [
    1 => UserObject2,
    2 => UserObject1
]

    where 1 or 2 will be your auth users ID, and UserObject1 or UserObject2 will be an object that gets returned by auth()->user().

    You can then even get a specific user object from cache, like this:

    Cache::get('online_users')[auth()->id];
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