memcache/memcached PHP Operating Manual (pure manuscript version) memcached Java memcached official website Redis memcached Comparison

Source: Internet
Author: User
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Memcache and memcached is actually a thing, just php if the extension is not the same one is Php_memcache.dll and Php_memcached.dll, 2009 years or so someone rich memcache usage and performance, Have memcached, usage also has a great improvement such as adding getmulti () Bulk Get key value

Memcache class

$memcache = new Memcache;
$memcache->connect('127.0.0.1', 11211);
$memcache->pconnec('127.0.0.1', 11211); // 打开一个到服务器的持久化连接 , 连接不会在脚本执行结束后或者close()被调用后关闭
$memcache->addServer('123.57.210.55', 11211,$persistent,$weight); // 向连接池中添加一个memcache服务器 $persistent 是否持久化连接 $weight    控制桶的数量提升被选中的权重 $timeout 表示连续持续时间
$memcache->set('name', 'TK'); // 默认存储不压缩 不过期 , 其中字符串和数值直接存储,其他类型序列化后存储    set其实是add方法和replace方法集合
$memcache->set('email', 'julylovin@163.com',MEMCACHE_COMPRESSED,5);// MEMCACHE_COMPRESSED设置存储是否压缩 , 5表示5秒后过期但是最大只能设置2592000秒(30天)   如果设置为0 表示永不过期, 可以设置将来的时间戳
$memcache->set('info',array('age'=>'26','salary'=>'1000'));  // 可以直接存储数组,redis中存储需要手动serialize()序列化
$memcache->add('counter', '10', MEMCACHE_COMPRESSED, 0); //如果键值存在会返回false , 如果不存在, 和set方法一样,生成一个counter的key并赋值10
$memcache->replace ('counter', '10'); //如果键值不存在会返回false , 如果存在, 替换counter的值为10
$memcache->increment('counter', 3); // 首先将元素当前值转换成数值然后减去value 操作counter键值+3    若键不存在 则返回false 不能用于压缩的键值操作,否则get键会失败
$memcache->decrement('counter', 3); // 操作counter键值-3 , 若键不存在 则返回false
$memcache->delete('counter', 3); // 操作删除键counter , 3表示3秒内删除,默认是0即立即删除
$memcache->flush(); //flush()立即使所有已经存在的元素失效
$memcache->getExtendedStats (); // 返回一个二维关联数据的服务器统计信息。数组的key由host:port方式组成
$memcache->getServerStatus ('127.0.0.1'); // 获取返回一个服务器的在线/离线状态  0表示离线 非0在线
$memcache->getStats(); // 获取服务器统计信息
$memcache->getVersion(); // 返回服务器版本信息
$memcache->setCompressThreshold ($threshold, $min_saving); //  开启大值自动压缩   $threshold设置压缩阀值 2000字节 ,即字节数大于2K 就压缩    $min_saving  0--1之间  0.2表示压缩20%
$memcache->setServerParams('memcache_host', 11211, 1, 15, true, '_callback_memcache_failure'); // $memcache->addServer('memcache_host', 11211, false, 1, 1, -1, false);   已经通过addServer 配置过服务器 使用setServerParams 重新设置配置信息

The above describes the memcache/memcached PHP operating manual (pure manuscript version), including the content of the memcached, I hope to be interested in PHP tutorial friends helpful.

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