How to use caching mechanism in CakePHP?

CakePHP is a popular PHP framework that provides many features, one of which is a built-in caching mechanism. Caching is a technology that temporarily stores data for quick access. In web development, using caching is one of the common optimization techniques. It can improve application performance and reduce requests to the database or other resources. In this article, we will discuss how to use the caching mechanism in CakePHP.

1. Types of cache

CakePHP supports multiple cache types, including file cache, memory cache and APC (Alternative PHP Cache) cache. In the following sections, we introduce these three cache types and discuss how to use them.

2. File Caching

File caching is a technology that stores data into files and reads data from files. It is a simple cache type suitable for small applications or applications with less read and write load. In CakePHP, you can use the Cache class to read and write file caches.

To use file caching, follow these steps:

• Create a file cache directory to store cache files. It is recommended to place this directory under the application's tmp/cache directory.

• In the app/Config/core.php file of the application, set the default parameters of the file cache:

  Cache::config('default', array(

    'engine' => 'File',
    'path' => CACHE . 'data/',
    'prefix' => 'cake_default_',
    'serialize' => true,
    'duration' => 3600,

  ));

In the above code, we set the default cache engine to file cache, and specified the storage path of the cache file, the prefix of the cache key, and the sequence The flag of the cached data and the duration of the cache.

• Use the methods of the Cache class in the code to read and write cached data:

  // Write cached data
  Cache::write(' my_cache_key', $data);

  //Read cache data
  $data = Cache::read('my_cache_key');

In the above code , we use the write method to write data to the cache, and the read method to read data from the cache.

3. Memory cache

Memory cache is a technology that stores data in memory. It is faster than file caching and suitable for applications with high read and write loads. CakePHP supports multiple memory caching engines, including Memcache, Redis and APCu.

To use MemCache, follow these steps:

• Install and configure the required MemCache engine on the server. In this article, we will use Memcache as the memory caching engine.

• In the app/Config/core.php file of the application, set the default parameters of the memory cache:

  Cache::config('default', array(

  'engine' => 'Memcache',
  'duration' => '+1 day',
  'probability' => 100,
  'prefix' => '_myapp_',
  'servers' => array(
      '127.0.0.1:11211'
  ),
  'persistent' => true,
  'compress' => false,

  ));

In the above code, we set the default cache engine to Memcache and specified the cache duration, cache key prefix, Memcache server Address and port as well as flags for persistent connections and compressed data.

• Use the methods of the Cache class in the code to read and write cached data:

  // Write cached data
  Cache::write(' my_cache_key', $data);

  //Read cache data
  $data = Cache::read('my_cache_key');

In the above code , we use the write method to write data to the cache, and the read method to read data from the cache.

4. APC Cache

APC cache is a technology that stores data into APC. APC is a PHP built-in caching tool that can store and retrieve data quickly. In CakePHP, caching can be implemented using the APC engine.

To use APC cache, follow these steps:

• Make sure the APC cache extension is installed on the server.

• In the app/Config/core.php file of the application, set the default parameters of the APC cache:

  Cache::config('default', array(

  'engine' => 'Apc',
  'duration' => '+1 day',
  'prefix' => 'myapp_',

  ));

In the above code, we set the default cache engine to APC and specified the duration of the cache and the prefix of the cache key.

• Use the methods of the Cache class in the code to read and write cached data:

  // Write cached data
  Cache::write(' my_cache_key', $data);

  //Read cache data
  $data = Cache::read('my_cache_key');

In the above code , we use the write method to write data to the cache, and the read method to read data from the cache.

5. Conclusion

CakePHP’s caching mechanism provides a way to quickly store and retrieve data, which can help us improve the performance of our applications. In this article, we discussed ways to use file caching, memory caching, and APC caching, and provided corresponding code examples. In order to obtain the best performance, it is recommended to choose an appropriate cache type based on the actual situation.

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