How to use cache in laravel

Laravel is a popular PHP framework that provides rich features and tools to help us build efficient web applications more easily. One very important function is caching, which can reduce database queries and improve application response speed by caching reused data. This article will introduce how to use caching in Laravel.

1. Laravel cache driver

Laravel provides a variety of cache drivers, including files, databases, Redis, Memcached, etc. By default, Laravel uses the file driver, which stores cached data in the file system. We can choose other cache drivers by modifying the configuration file.

Configuration file location: config/cache.php

For example, if we want to use Redis as the cache driver, we can modify the configuration file as follows:

'default' = > 'redis',
...
'redis' => [

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

],

2. Use cache

When using Laravel for data query, we can reduce the number of database queries through caching. The following is a sample code:

$users = Cache::remember('users', $minutes, function () {

return DB::table('users')->get();

});

The above code uses Cache::remember method to cache query results. The first parameter is the cache key name, the second parameter is the cache time (in minutes), and the third parameter is a closure function used to query the database and return the results. If the key exists in the cache, the data in the cache is returned; otherwise, the closure function is executed and the result is stored in the cache.

We can also use the Cache::put method to store data directly into the cache, and then use the Cache::get method to obtain the data in the cache. For example:

Cache::put('key', 'value', $minutes);
$value = Cache::get('key');

3. Custom cache driver

If the cache driver provided by Laravel cannot meet the needs, we can implement our own caching solution by customizing the cache driver. Here is a simple example:

First, define the new cache driver in the config/cache.php file:

'custom' => [

'driver' => 'custom',
'connection' => null,

] ,

Then, register the custom driver in app/Providers/AppServiceProvider.php:

use IlluminateSupportFacadesCache;
use IlluminateSupportServiceProvider;

class AppServiceProvider extends ServiceProvider
{

public function register()
{
    Cache::extend('custom', function ($app) {
        return new CustomCacheDriver();
    });
}

}

Finally, implement specific caching logic in the CustomCacheDriver class:

use IlluminateContractsCacheStore;

class CustomCacheDriver implements Store
{

public function get($key)
{
    // 获取缓存数据
}

public function put($key, $value, $seconds)
{
    // 存储数据到缓存
}

// 其他方法...

}

Summary

This article introduces the basic usage of cache in Laravel and the method of customizing the cache driver. By using cache appropriately, application performance and response speed can be greatly improved. In practical applications, we need to choose appropriate caching solutions and optimization strategies based on specific needs to maximize the role of caching.

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