Pub/Sub in Redis

These Redis commands allow you to listen for messages on a given "channel". You may publish messages to the channel from another application, or even using another programming language, allowing easy communication between applications and processes. 

2. Create Your Project with Laravel 8

2.1 Download Laravel 8 to your folder: D:/Project

composer create-project laravel/laravel:^8.0 laravel80 

2.2 Create virtual host to your Project: D:/Project/laravel80

http://laravel80.local

3. How Subscribe a channel of Redis in Laravel

3.1  Make command to subscribe channel

3.1.1 php artisan make:command RedisSubscribe

3.1.2 Edit app/Console/Commands/RedisSubscribe.php

<?php namespace App\Console\Commands;

use Illuminate\Console\Command;

use Illuminate\Support\Facades\Redis;

class RedisSubscribe extends Command

{

    protected $signature = 'redis:subscribe';

    protected $description = 'Subscribe to a Redis channel';

    public function __construct()

    {

        parent::__construct();

    }

    public function handle()

    {

        Redis::subscribe(['trueme-channel'], 

         function (string $message) {

             echo $message;

        });

    }

}

4. Test Subscribe and Publish

4.1 Run redis:subscribe command

4.2 Run http://laravel80.local/publish

4.3 Check results on command step 4.1

$ php artisan redis:subscribe

{"name":"This is message is publish from laravel"}

...

4.4 Check Subscribe channel on Redis-cli

4.5 Goto Redis-cli

# redis-cli

127.0.0.1:6379> 

4.6 Get all channels are subscribed 

127.0.0.1:6379> pubsub channels

1) "laravel_database_trueme-channel"

127.0.0.1:6379> 

4.7 Push message from redis-cli

127.0.0.1:6379> pubsub channels

1) "laravel_database_trueme-channel"

127.0.0.1:6379> Publish laravel_database_trueme-channel "This is message is push from redis-cli"

(integer) 1

127.0.0.1:6379> 

4.7 Check command screen at step 4.1

$ php artisan redis:subscribe

This is message is push from redis-cli

5. Laravel Publish Subscribe Source