What are the common Memcached operations in PHP programming?

As a programming language, PHP has a wide range of application fields, especially in Web development. Among them, application server caching technology is a very critical link in the field of Web development. Memcached is currently the most widely used application-level server caching technology. This article will introduce common Memcached operations in PHP programming.

1. Connecting to the Memcached server

The first step in using Memcached in PHP is to connect to the Memcached server. The following is a basic code example:

$memcached = new Memcached();
$memcached->addServer('127.0.0.1', 11211);

2. Caching data

When using Memcached, the most basic operation is to cache data. The following are some common cached data operations:

// 缓存字符串数据
$memcached->set('key', 'value');

// 缓存整数数据
$memcached->set('key', 100);

// 缓存数组数据
$memcached->set('key', array('foo' => 'bar'));

// 缓存对象数据
$object = new stdClass();
$object->foo = 'bar';
$memcached->set('key', $object);

3. Get cached data

In order to obtain cached data, you can use the following operations:

// 获取已缓存的字符串数据
$value = $memcached->get('key');

// 获取已缓存的整数数据
$value = $memcached->get('key');

// 获取已缓存的数组数据
$value = $memcached->get('key');

// 获取已缓存的对象数据
$value = $memcached->get('key');

4. Replace cached data

If you need to update the data in the cache, you can use the following operation to replace the old value with the new value:

// 替换已缓存的字符串数据
$memcached->replace('key', 'new value');

// 替换已缓存的整数数据
$memcached->replace('key', 200);

// 替换已缓存的数组数据
$memcached->replace('key', array('baz' => 'qux'));

// 替换已缓存的对象数据
$newObject = new stdClass();
$newObject->baz = 'qux';
$memcached->replace('key', $newObject);

5. Delete cached data

If you need to delete data from the cache, you can use the following operations:

// 删除已缓存的数据
$memcached->delete('key');

6. Add cache data

Sometimes you need to check whether it already exists If the key with the same name does not exist, add the data to the cache. The following is a basic code example:

// 添加新数据到缓存
$memcached->add('newkey', 'new value');

7. Increment and decrement operations

If you need to increment or decrement a cached integer, you can use the following operations:

// 递增一个整数
$memcached->increment('key', 5);

// 递减一个整数
$memcached->decrement('key', 2);

The above are common Memcached operations in PHP programming. Because Memcached provides convenient and fast data access, using it can greatly improve application performance. Of course, this is only part of the operations of Memcached, and you need to learn more by yourself.

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