<?php

/**

 * 分布式的 memcache set 实现

 */

/**

 * 创建缓存实现memcache 添加分布式服务器  并设置权限

 */

function createCache() {

    $arr = array(

        array("host" => "127.0.0.1", "port" => 11211, "weight" => 20), //127.0.0.1:11211的权重是20%

        array("host" => "127.0.0.1", "port" => 11212, "weight" => 80), //127.0.0.1:11212的权重是80%

    );

    $cache = new memcache();

    foreach ($arr as $ele) {

        //使用长连接，并且设置不同memcache服务器的权重，将memcache服务器添加到连接池

        $cache->addServer($ele["host"], $ele["port"], true, $ele["weight"]);

    }

    return $cache;

}

header("content-type:text/html;charset=utf-8");

$cache = createCache();

for ($i = 0; $i < 10; $i++) {

    //由于使用了分布式，所以这里不需要使用connect或者pconnect打开链接,
    //set方法会调用memcache的分布式缓存分配算法，按照权重将缓存项缓存到连接池的某个服务器

    if ($cache->set($i, $i, 0, 3600)) {

        echo "缓存成功,key:$i,value:$i";

    } else {

        echo "缓存失败";

    }

    echo "<br/>";

}

?>

<?php

/**

 * 分布式的 memcache get 实现

 */

function createCache() {

    $arr = array(

        array("host" => "127.0.0.1", "port" => 11211, "weight" => 20),

        array("host" => "127.0.0.1", "port" => 11212, "weight" => 80)

    );

    $cache = new memcache();

    foreach ($arr as $ele) {

        $cache->addServer($ele ["host"], $ele ["port"], true, $ele ["weight"], 1);

    }

    return $cache;

}

header('content-type:text/html;charset=utf-8');

$cache = createCache();

$val;

for ($i = 0; $i < 10; $i ++) {

    $val = $cache->get($i);

    if (false === $val) {

        echo "缓存获取失败";

    } else {

        echo "缓存获取成功:,key:$val,value:$val";

    }

    echo "<br/>";

}

$cache->close();

?>