How to use laravel redis cache

Laravel is a very popular PHP framework that helps developers build web applications faster. Among them, Laravel's caching system provides a convenient and fast method that can help developers reduce queries to the database. Redis is a high-performance in-memory data storage system and one of the cache drivers that Laravel can use. This article will introduce how to use Laravel Redis cache to improve application performance.

Step 1: Install Redis

First, you need to install Redis on the server. On Ubuntu, you can install it through the following command:

sudo apt-get update
sudo apt-get install redis-server

If you are using For other operating systems, you can download relevant documents from the Redis official website for installation.

Step 2: Configure Laravel

To use Redis cache in an application, you need to make relevant configurations in Laravel's configuration file first. Open the config/cache.php file, find the line 'default' => env('CACHE_DRIVER', 'file'), and modify it to:

'default' => env('CACHE_DRIVER', 'redis'),

Next, you need to add the Redis configuration. Find the line 'stores' => [ and add the following content:

'redis' => [
        'driver' => 'redis',
        'connection' => 'default',
],

In 'connections' => [ Add the following content:

'default' => [
        'host'     => env('REDIS_HOST', '127.0.0.1'),
        'port'     => env('REDIS_PORT', 6379),
        'database' => env('REDIS_DB', 0),
        'password' => env('REDIS_PASSWORD', null),
 ],

Here, we configure the default Redis connection, using parameters such as host, port, database and password. These parameters can be adjusted according to the configuration of Redis on the server. Revise.

Step 3: Use Redis cache

Now that we have completed the Redis configuration in Laravel, we can start using Redis cache. In Laravel, caching operations can be performed in the following ways:

// 获取缓存值
$value = Cache::get('key');

// 存储缓存
Cache::put('key', 'value', $minutes);

// 存储永久缓存
Cache::forever('key', 'value');

// 判断缓存是否存在
if (Cache::has('key')) {
    //
}

// 删除缓存
Cache::forget('key');

// 清空所有缓存
Cache::flush();

It should be noted that when using Redis cache, the parameter $minutes is the number of minutes to cache. If you need to store a permanent cache, you can use the forever method.

In Laravel, you can also set the cache expiration time in the following ways:

// 设置缓存有效期为 5 分钟
Cache::put('key', 'value', 5);

// 设置缓存有效期为 10 分钟
Cache::add('key', 'value', 10);

If you need to customize the cache prefix, you can 'stores' => [ Add the following to:

'redis' => [
        'driver' => 'redis',
        'connection' => 'default',
        'prefix' => 'my_custom_cache_prefix',
],

This way, all cache keys will be prefixed with my_custom_cache_prefix:.

Conclusion

The use of Laravel Redis cache is very simple, and only simple configuration is required to improve the performance of the application. When using Redis cache, you need to pay attention to the cache expiration time and prefix settings. This is just a brief introduction to Laravel Redis caching. For more information, you can view the Laravel official documentation.

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