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memcached 的安装方法详见我博客的另一个页面:http://www.cnblogs.com/chrdai/p/6656443.html 用法: 一、memcache 连接命令: 1、memcache :: addServer($host , $port , $weight=0); // 向服务器池中增加一个服务器 2、memcache :: connect($host , $port , $timeout);// 打开一个memcached服务端连接,$timeout为连接持续(超时)时间,一般不要做更改 <?php /** * ***** memcache 打开一个memcached服务端链接 */ $mem = new memcache(); $mem->connect('127.0.0.1',11211); echo $mem->getversion(); // 1.4.4-14-g9c660c0 3、memcache :: pconnect($host , $port , $timeout); //打开一个到服务器的持久化连接,$timeout为连接持续(超时)时间,一般不要做更改 <?php /** * ***** memcache 打开一个到服务器的持久链接 */ $mem = new memcache(); $mem->pconnect('127.0.0.1',11211); echo $mem -> getversion(); // 1.4.4-14-g9c660c0 4、memcache :: close(); // 这个函数不会关闭持久化连接, 持久化连接仅仅会在web服务器关机/重启时关闭 <?php /** * ***** memcache 关闭memcached服务端链接 */ $mem = new memcache(); $mem->connect('127.0.0.1',11211); $mem->close();
二、memcache 存储命令: 1、memcache :: set($key , $value , $expiration); // 添加一个值,如果已经存在,则覆写, $expiration 为存储时间,默认为 0 <?php $mem = new memcache(); $mem->addServer('127.0.0.1',11211); $mem -> set('string','a simple string', false,3600); // 为什么添加 false,请查看我博客另一个页面 http://www.cnblogs.com/chrdai/p/6774856.html 2、memcache :: add($key , $value , $expiration); // 添加一个值,如果已经存在,则返回false <?php $mem = new memcache(); $mem->addServer('127.0.0.1',11211); if( $mem->add("mystr","this is a memcache test!",false,3600)) { echo '原始数据缓存成功!'; } else { echo '数据已存在:'.$mem->get("mystr"); } 3、memcache :: replace($key , $value , $expiration); // 对一个已有的key进行覆写操作 <?php /** * ***** memcache存储操作 */ $mem = new memcache(); $mem->addServer('127.0.0.1',11211); $mem -> replace('string','replace this string', false,3600); 4、memcache :: append($key , $value ); // 向已存在元素后追加数据 <?php /** * ***** memcache存储命令 */ $mem = new memcache(); $mem->addServer('127.0.0.1',11211); $mem -> set('foo','abc',false,3600); $mem -> append('foo','def'); echo $mem -> get('foo'); // abcdef 5、memcache :: prepend($key , $value ); // 向已存在元素前面追加数据 <?php /** * ***** memcache存储命令 */ $mem = new memcache(); $mem->addServer('127.0.0.1',11211); $mem -> set('foo','abc',false,3600); $mem -> prepend('foo','def',false,3600); echo $mem -> get('foo'); // defabc
三、memcache 查找命令: 1、memcache :: get($key , [ $cache_cb , $cas_token] ); // 获取某个元素 参数:
<?php /** * ***** memcache查找命令 */ $mem = new memcache(); $mem->addServer('127.0.0.1',11211); $mem -> set('foo','abc',false,3600); echo $mem -> get('foo'); // abc
四、memcache 删除命令: 1、memcache::delete ( <?php /** * ***** memcache删除命令 */ $mem = new memcache(); $mem->addServer('127.0.0.1',11211); $mem -> set('foo','abc',false,3600); $mem -> delete('foo'); echo $mem -> get('foo'); // 没有这个值了 2、memcache::flush( <?php /** * ***** memcache 删除memcache中所有的元素 */ $mem = new memcache(); $mem->pconnect('127.0.0.1',11211); $mem -> set('foo','string',false,3600); $mem -> flush(); echo $mem -> get('foo'); // 什么也没有了 五、memcache 自增减命令: 1、memcache::increment($key , [$value=1]); // 将$key 自增 $value ,$value默认为1 <?php /** * ***** memcache 自增减命令 */ $mem = new memcache(); $mem->pconnect('127.0.0.1',11211); $mem -> set('counter',2,false,3600); $mem -> increment('counter',5); echo $mem -> get('counter'); // 7 2、memcache::decrement($key , [$value=1]); // 将$key 自减 $value ,$value默认为1 <?php /** * ***** memcache 自增减命令 */ $mem = new memcache(); $mem->pconnect('127.0.0.1',11211); $mem -> set('counter',10,false,3600); $mem -> decrement('counter',5); echo $mem -> get('counter'); // 5
六、memcache 查看服务器信息命令: 1、memcache::getVersion(); // 查看当前版本 <?php /** * ***** memcache查看当前版本命令 */ $mem = new memcache(); $mem->addServer('127.0.0.1',11211); echo $mem->getVersion(); //1.4.4-14-g9c660c0 2、memcache::getServerStatus($host , [$port]); // 获取服务器的在线/离线状态,$port默认为11211 <?php /** * ***** memcache 查看服务器是否在线命令 */ $mem = new memcache(); $mem->pconnect('127.0.0.1',11211); var_dump($mem -> getServerStatus('127.0.0.1', 11211)); // 1 3、memcache::getStats(); // 获取服务器统计信息 <?php /** * ***** memcache 查看服务器统计信息命令 */ $mem = new memcache(); $mem->pconnect('127.0.0.1',11211); var_dump($mem -> getStats()); /* array (size=35) 'pid' => string '10972' (length=5) 'uptime' => string '3054797089' (length=10) 'time' => string '252939981' (length=9) 'version' => string '1.4.4-14-g9c660c0' (length=17) 'pointer_size' => string '64' (length=2) 'curr_connections' => string '12' (length=2) 'total_connections' => string '35' (length=2) 'connection_structures' => string '14' (length=2) 'cmd_get' => string '173' (length=3) 'cmd_set' => string '183' (length=3) 'cmd_flush' => string '2' (length=1) 'get_hits' => string '121' (length=3) 'get_misses' => string '52' (length=2) 'delete_misses' => string '0' (length=1) 'delete_hits' => string '9' (length=1) 'incr_misses' => string '4' (length=1) 'incr_hits' => string '14' (length=2) 'decr_misses' => string '0' (length=1) 'decr_hits' => string '8' (length=1) 'cas_misses' => string '1' (length=1) 'cas_hits' => string '1' (length=1) 'cas_badval' => string '0' (length=1) 'auth_cmds' => string '0' (length=1) 'auth_errors' => string '0' (length=1) 'bytes_read' => string '9204' (length=4) 'bytes_written' => string '14008' (length=5) 'limit_maxbytes' => string '67108864' (length=8) 'accepting_conns' => string '1' (length=1) 'listen_disabled_num' => string '0' (length=1) 'threads' => string '4' (length=1) 'conn_yields' => string '0' (length=1) 'bytes' => string '270' (length=3) 'curr_items' => string '3' (length=1) 'total_items' => string '154' (length=3) 'evictions' => string '0' (length=1) */ 4、memcache::getExtendedStats(); // 获取缓存服务器池中所有服务器统计信息 <?php /** * ***** memcache 获取缓存服务器池中所有服务器统计信息命令 */ $mem = new memcache(); $mem->pconnect('127.0.0.1',11211); var_dump($mem -> getExtendedstats()); /* array (size=1) '127.0.0.1:11211' => array (size=35) 'pid' => string '10972' (length=5) 'uptime' => string '3054797301' (length=10) 'time' => string '252940193' (length=9) 'version' => string '1.4.4-14-g9c660c0' (length=17) 'pointer_size' => string '64' (length=2) 'curr_connections' => string '12' (length=2) 'total_connections' => string '35' (length=2) 'connection_structures' => string '14' (length=2) 'cmd_get' => string '173' (length=3) 'cmd_set' => string '183' (length=3) 'cmd_flush' => string '2' (length=1) 'get_hits' => string '121' (length=3) 'get_misses' => string '52' (length=2) 'delete_misses' => string '0' (length=1) 'delete_hits' => string '9' (length=1) 'incr_misses' => string '4' (length=1) 'incr_hits' => string '14' (length=2) 'decr_misses' => string '0' (length=1) 'decr_hits' => string '8' (length=1) 'cas_misses' => string '1' (length=1) 'cas_hits' => string '1' (length=1) 'cas_badval' => string '0' (length=1) 'auth_cmds' => string '0' (length=1) 'auth_errors' => string '0' (length=1) 'bytes_read' => string '9211' (length=4) 'bytes_written' => string '14758' (length=5) 'limit_maxbytes' => string '67108864' (length=8) 'accepting_conns' => string '1' (length=1) 'listen_disabled_num' => string '0' (length=1) 'threads' => string '4' (length=1) 'conn_yields' => string '0' (length=1) 'bytes' => string '270' (length=3) 'curr_items' => string '3' (length=1) 'total_items' => string '154' (length=3) 'evictions' => string '0' (length=1) */
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