How to use Memcached commands in PHP

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Release: 2023-03-22 11:20:02
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In this article, Pig Mastiff shares with you how to use the Memcached command in PHP and makes a summary. I hope it can help everyone.

Portal: http://www.php.net/manual/zh/book.memcached.php
There is no memcached extension under windows, only memcache extension. Personal test, there is still a big difference between the two. So it is recommended to do it in linux.

<?php    $mem = new Memcached();    //添加一台服务器资源
    $mem->addServer(&#39;127.0.0.1&#39;, &#39;11211&#39;);    //添加多台,分布式存储,第三个参数为权重值
    /*
            $servers = array(
            array(&#39;127.0.0.1&#39;, 11211, 33),
            array(&#39;127.0.0.2&#39;, 11211, 67),
        );
        $res = $mem->addServers($servers);

    */

    //设置:键  值  过期时间(秒)
    $mem->set(&#39;name&#39;, &#39;huangyuxin&#39;, 5);    //注意:最大生命周期可设置为60*60*24*30 三十天的时间 
    //再往后的话要加上时间戳 time()+60*60*24*31(三十一天)

    //获取值
    $value = $mem->get(&#39;name&#39;);    //添加值,如果存在此键,false
    $result = $mem->add(&#39;name&#39;,&#39;zhangsan&#39;);    //追加: 键 值 ,追加在一个已经存在的值得后面,不存在也为false
    //setOption 这一句必须加上,不然追加不上
    //prepend 前面追加
    //如果Memcached::OPT_COMPRESSION常量开启,这个操作会失败,并引发一个警告,因为向压缩数据 后追加数据可能会导致解压不了。
    $mem->setOption(Memcached::OPT_COMPRESSION, false);    $mem->append(&#39;name&#39;,&#39;haha&#39;);    $value = $mem->get(&#39;name&#39;);    //这个是减掉元素的值,两个参数,第二个参数决定减掉数值几,默认是 1 ,increment 是加
    $mem->set(&#39;age&#39;, 12, 30);    $mem->decrement(&#39;age&#39;);    $mem->decrement(&#39;age&#39;,2);    $value = $mem->get(&#39;age&#39;);    //删除元素
    $mem->delete(&#39;age&#39;);    $mem->delete(&#39;age&#39;,60);    /*
    注意:
        服务端在这段时间拒绝对这个key的add和replace命令. 
        由于这个时间段的存在, 元素被放入一个删除队列
        表明它不可以通过get命令获取到值
        但是同时 add和replace命令也从服务端内存删除
    (表明元素会被立即删除并且之后对这个 key的存储命令也会成功)
*/

    //删除多个
    $mem->add(&#39;age&#39;, 12, 60);    $mem->add(&#39;name&#39;, &#39;huangyuxin&#39;, 60);    $res = $mem->deleteMulti(array(&#39;age&#39;,&#39;name&#39;));    //作废 :flush不会 真正的释放已有元素的内存, 而是逐渐的存入新元素重用那些内存。
    $mem->flush(10);//10秒内清除元素

    //获取所有键
    $mem->getAllKeys();    /*
        Memcached::getDelayed()向Memcached服务端发出一个检索
        keys指定的多个 key对应元素的请求。这个方法不会等待响应而
        是立即返回。当你需要收集元素值时, 调Memcached::fetch()
        或 Memcached::fetchAll()。如果with_cas设置为true,会
        同时请求每个元素的CAS标记。
    */
    $m->set(&#39;int&#39;, 99);    $m->set(&#39;array&#39;, array(11, 12));    $m->getDelayed(array(&#39;int&#39;, &#39;array&#39;), true);
    var_dump($m->fetchAll());    //获取多个值的信息
    $mem->set(&#39;age&#39;, 12, 60);    $mem->set(&#39;name&#39;, &#39;huangyuxin&#39;, 60);    $res = $mem->getMulti(array(&#39;age&#39;, &#39;name&#39;));    //设置多个键
    $items = array(    &#39;key1&#39; => &#39;value1&#39;,    &#39;key2&#39; => &#39;value2&#39;,    &#39;key3&#39; => &#39;value3&#39;,
);    $mem->setMulti($items);    $res = $mem->get(&#39;key1&#39;);//value

    //返回系统常量
    var_dump($mem->getOption(Memcached::OPT_COMPRESSION));    //返回最后一次操作的结果描述消息
    $mem->add(&#39;a&#39;, &#39;bar&#39;); // first time should succeed
    echo $mem->getResultMessage(), "\n"; //SUCCESS

    //查看此key在哪个服务器上
    $mem->add(&#39;a&#39;, &#39;bar&#39;); // first time should succeed
    $res = $mem->getServerByKey(&#39;a&#39;);    //array(3) { ["host"]=> string(9) "127.0.0.1" ["port"]=> int(11211) ["weight"]=> int(0) } 

    //返回服务器列表
    var_dump($mem->getServerList());    //返回服务器状态
    var_dump($mem->getServerList());    //服务器版本
    print_r($mem->getVersion());    //判断是否是持久链接
    $res = $mem->isPersistent();    //Memcached::replace()和Memcached::set()类似,但是如果 服务端不存在key, 操作将失败。
    $m->set(&#39;hh&#39;, &#39;aaaa&#39;);    $m->replace(&#39;hh&#39;, &#39;bbbb&#39;);    $res = $m->get(&#39;hh&#39;);    //删除从已知的服务器列表中的所有缓存服务器,重置回空。
    $mem->resetServerList();    //对某一key重新设置生命周期
    $m->set(&#39;aaaa&#39;, &#39;aaaa&#39;, 600);    $m->touch(&#39;aaaa&#39;, 5);    $value= $m->get(&#39;aaaa&#39;);    //关闭打开的链接
    $m->quit();

    var_dump($value);
Copy after login
Copy after login

The following suffix is ​​ByKey, which is generally used by multiple Memcached Servers. If you master the above commands, you will basically use them below.

touch->touchByKey
setMulti->setMultiByKey
getMulti->getMultiBykey
replace->replaceByKey
append->appendByKey
prepend->prependByKey
getServerByKey
getdelay->getDelayedByKey 
increment->incrementByKey
decrement->decrementByKey
add->addByKey
get->getByKey
delete->deleteMultiByKey
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Copy after login
$m->addByKey(&#39;指定服务器&#39;,&#39;键&#39;,"值")
Copy after login

Waiting more than taking action is equal to waiting to die.

Portal: http://www.php.net/manual/zh/book.memcached.php
There is no memcached extension under windows, only memcache extension. Personal test, there is still a big difference between the two. So it is recommended to do it in linux.

<?php    $mem = new Memcached();    //添加一台服务器资源
    $mem->addServer(&#39;127.0.0.1&#39;, &#39;11211&#39;);    //添加多台,分布式存储,第三个参数为权重值
    /*
            $servers = array(
            array(&#39;127.0.0.1&#39;, 11211, 33),
            array(&#39;127.0.0.2&#39;, 11211, 67),
        );
        $res = $mem->addServers($servers);

    */

    //设置:键  值  过期时间(秒)
    $mem->set(&#39;name&#39;, &#39;huangyuxin&#39;, 5);    //注意:最大生命周期可设置为60*60*24*30 三十天的时间 
    //再往后的话要加上时间戳 time()+60*60*24*31(三十一天)

    //获取值
    $value = $mem->get(&#39;name&#39;);    //添加值,如果存在此键,false
    $result = $mem->add(&#39;name&#39;,&#39;zhangsan&#39;);    //追加: 键 值 ,追加在一个已经存在的值得后面,不存在也为false
    //setOption 这一句必须加上,不然追加不上
    //prepend 前面追加
    //如果Memcached::OPT_COMPRESSION常量开启,这个操作会失败,并引发一个警告,因为向压缩数据 后追加数据可能会导致解压不了。
    $mem->setOption(Memcached::OPT_COMPRESSION, false);    $mem->append(&#39;name&#39;,&#39;haha&#39;);    $value = $mem->get(&#39;name&#39;);    //这个是减掉元素的值,两个参数,第二个参数决定减掉数值几,默认是 1 ,increment 是加
    $mem->set(&#39;age&#39;, 12, 30);    $mem->decrement(&#39;age&#39;);    $mem->decrement(&#39;age&#39;,2);    $value = $mem->get(&#39;age&#39;);    //删除元素
    $mem->delete(&#39;age&#39;);    $mem->delete(&#39;age&#39;,60);    /*
    注意:
        服务端在这段时间拒绝对这个key的add和replace命令. 
        由于这个时间段的存在, 元素被放入一个删除队列
        表明它不可以通过get命令获取到值
        但是同时 add和replace命令也从服务端内存删除
    (表明元素会被立即删除并且之后对这个 key的存储命令也会成功)
*/

    //删除多个
    $mem->add(&#39;age&#39;, 12, 60);    $mem->add(&#39;name&#39;, &#39;huangyuxin&#39;, 60);    $res = $mem->deleteMulti(array(&#39;age&#39;,&#39;name&#39;));    //作废 :flush不会 真正的释放已有元素的内存, 而是逐渐的存入新元素重用那些内存。
    $mem->flush(10);//10秒内清除元素

    //获取所有键
    $mem->getAllKeys();    /*
        Memcached::getDelayed()向Memcached服务端发出一个检索
        keys指定的多个 key对应元素的请求。这个方法不会等待响应而
        是立即返回。当你需要收集元素值时, 调Memcached::fetch()
        或 Memcached::fetchAll()。如果with_cas设置为true,会
        同时请求每个元素的CAS标记。
    */
    $m->set(&#39;int&#39;, 99);    $m->set(&#39;array&#39;, array(11, 12));    $m->getDelayed(array(&#39;int&#39;, &#39;array&#39;), true);
    var_dump($m->fetchAll());    //获取多个值的信息
    $mem->set(&#39;age&#39;, 12, 60);    $mem->set(&#39;name&#39;, &#39;huangyuxin&#39;, 60);    $res = $mem->getMulti(array(&#39;age&#39;, &#39;name&#39;));    //设置多个键
    $items = array(    &#39;key1&#39; => &#39;value1&#39;,    &#39;key2&#39; => &#39;value2&#39;,    &#39;key3&#39; => &#39;value3&#39;,
);    $mem->setMulti($items);    $res = $mem->get(&#39;key1&#39;);//value

    //返回系统常量
    var_dump($mem->getOption(Memcached::OPT_COMPRESSION));    //返回最后一次操作的结果描述消息
    $mem->add(&#39;a&#39;, &#39;bar&#39;); // first time should succeed
    echo $mem->getResultMessage(), "\n"; //SUCCESS

    //查看此key在哪个服务器上
    $mem->add(&#39;a&#39;, &#39;bar&#39;); // first time should succeed
    $res = $mem->getServerByKey(&#39;a&#39;);    //array(3) { ["host"]=> string(9) "127.0.0.1" ["port"]=> int(11211) ["weight"]=> int(0) } 

    //返回服务器列表
    var_dump($mem->getServerList());    //返回服务器状态
    var_dump($mem->getServerList());    //服务器版本
    print_r($mem->getVersion());    //判断是否是持久链接
    $res = $mem->isPersistent();    //Memcached::replace()和Memcached::set()类似,但是如果 服务端不存在key, 操作将失败。
    $m->set(&#39;hh&#39;, &#39;aaaa&#39;);    $m->replace(&#39;hh&#39;, &#39;bbbb&#39;);    $res = $m->get(&#39;hh&#39;);    //删除从已知的服务器列表中的所有缓存服务器,重置回空。
    $mem->resetServerList();    //对某一key重新设置生命周期
    $m->set(&#39;aaaa&#39;, &#39;aaaa&#39;, 600);    $m->touch(&#39;aaaa&#39;, 5);    $value= $m->get(&#39;aaaa&#39;);    //关闭打开的链接
    $m->quit();

    var_dump($value);
Copy after login
Copy after login

The following suffix is ​​ByKey, which is generally used by multiple Memcached Servers. If you master the above commands, you will basically use them below.

touch->touchByKey
setMulti->setMultiByKey
getMulti->getMultiBykey
replace->replaceByKey
append->appendByKey
prepend->prependByKey
getServerByKey
getdelay->getDelayedByKey 
increment->incrementByKey
decrement->decrementByKey
add->addByKey
get->getByKey
delete->deleteMultiByKey
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Copy after login
$m->addByKey(&#39;指定服务器&#39;,&#39;键&#39;,"值")
Copy after login

Related recommendations:

How to install Memcached service method in linux

Ubuntu memcached installation and configuration method in php

PHP memory caching function memcached example

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