A brief analysis of how to delete key in laravel redis

Redis is a popular in-memory database used to cache frequently accessed data. Laravel is a popular PHP framework that provides many powerful cache processing libraries. In this article, we will discuss how to delete key in laravel redis.

In laravel, we can use the Illuminate\Support\Facades\Redis facade to access redis. We need to configure the redis connection in config/database.php. Here is the sample code:

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

Now that we have configured the redis connection, we can get and set values ​​from redis using the following methods:

// 设置值
Redis::set('key', 'value');

// 获取值
$value = Redis::get('key');

Delete key

Delete key Very easy too. We can use the del method to delete one or more keys.

// 删除单个key
Redis::del('key');

// 删除多个key
Redis::del(['key1', 'key2', 'key3']);

Let’s imagine a scenario. We are developing a legal paparazzi website and need to create a list named "article" (implemented using a redis list), which stores the keys of all articles. When editing or deleting an article, we need to remove the corresponding article key from the list.

Deletion operations can be accomplished by finding and deleting the corresponding key in the list. Here is the code sample:

$articleKey = 'article:1';
$listKey = 'article:keys';

// 从列表中删除键
Redis::lrem($listKey, 1, $articleKey);

// 删除实际键
Redis::del($articleKey);

In the above code, we are using lrem method to remove article keys from the list. The first parameter is the list key, the second parameter is the number of elements to be deleted (we want to delete one element), and the third parameter is the element itself to be deleted. We then use the del method to delete the actual article key.

Summary

As we can see, using laravel redis is very simple. We can use the red gates facade to access redis and use set, get, del and other methods for caching operations. Deleting a key is also a simple task and can be accomplished with a simple lrem call.

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