Practice and thinking on optimizing data interaction with Memcache caching technology in PHP

Practice and thinking of Memcache caching technology to optimize data interaction in PHP

In modern Web applications, data interaction is a very important issue. It is not efficient enough and will limit Web applications. Program scalability and performance. In order to speed up data interaction, our usual approach is to optimize the design of the database, improve the performance of the hardware and increase the server capacity. However, these methods all have a common limitation: they increase the cost of the system.

In recent years, Memcache technology has provided a very good solution to this problem. Memcache is a caching technology that caches data for an entire web application. This technique can be used to speed up data access and reduce the load on the database server. This article will introduce how to use Memcache to optimize data interaction in PHP.

What is Memcache caching technology?

Memcache is a memory caching technology that is used to speed up data access in web applications. Unlike traditional disk storage, Memcache stores data in memory, which means it can query, read, and write data very quickly. Memcache caching technology is commonly used to cache pages, query results, objects and other data.

Use Memcache to optimize data interaction in PHP

Using Memcache caching technology in PHP can optimize the performance of data interaction. The following are the steps to use Memcache caching technology:

1. Install and configure the Memcache extension

To use Memcache, you need to install and configure the Memcache extension. Here are the steps on how to install and configure the Memcache extension on Ubuntu 16.04:

$ sudo apt-get update
$ sudo apt-get install memcached
$ sudo apt-get install php-memcached

After installation and configuration are complete, you will need to restart the Apache server for it to take effect.

2. Use the Memcache class to connect to the Memcached server

In PHP, the Memcache class is used to connect to the Memcached server. You can connect to the Memcached server using the following code:

$memcache = new Memcache;
$memcache->connect('localhost', 11211);

In this example, The port we connect to the local Memcached server is 11211.

3. Store data in Memcache

It is easy to store data in Memcache. If we want to store data into Memcache, we can use the following syntax:

$memcache->set('key', 'value', 0, 60);

In this In the example, we store the value with key "key" and value "value" into Memcache, and it will be kept for 60 seconds. If we want to store the data permanently, set the third parameter to 0.

4. Retrieve data from Memcache

Retrieving data from Memcache is also easy. We can retrieve data from Memcache using the following syntax:

$memcache->get('key');

In this example, we retrieve the key "key" from Memcache value. If we try to retrieve a value that does not exist, null is returned.

5. Delete data from Memcache

If we want to delete data from Memcache, we can use the following syntax:

$memcache->delete('key' );

In this example, we delete the value with the key "key" from Memcache. If we try to delete a value that doesn't exist, nothing will happen.

Conclusion

In this article, we introduced the basic ideas and practical steps of Memcache caching technology to optimize data interaction in PHP. Such efficient and flexible technology can greatly improve the performance of web applications and reduce the load on databases and servers. Although Memcache caching technology may not be a perfect solution to all problems, it is indeed a very useful tool that can effectively optimize the performance of data interaction.

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