你如何在PHP中使用memcache

Question

我終於在家用電腦上運行了memcache，所以我終於可以開始使用它了！

雖然我正在嘗試使用代碼，但我沒有一個好的開始

php.net @memcache-set我無法獲得他們發布的示例代碼

我試過這個：

<?php
/* procedural API */
$memcache_obj = memcache_connect('memcache_host', 11211);
memcache_set($memcache_obj, 'var_key', 'some variable', 0, 30);
echo memcache_get($memcache_obj, 'var_key');
?>

---

然后

<?php
/* OO API */
$memcache_obj = new Memcache;
$memcache_obj->connect('memcache_host', 11211);
$memcache_obj->set('var_key', 'some really big variable', MEMCACHE_COMPRESSED, 50);
echo $memcache_obj->get('var_key');
?>

---

並從上面的代碼中得到了這些錯誤;

Warning: Memcache::connect() [memcache.connect]: Can't connect to memcache_host:11211, A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. (10060) in C:\webserver\htdocs\test\memcache\index.php on line 36

Warning: Memcache::set() [memcache.set]: Failed to extract 'connection' variable from object in C:\webserver\htdocs\test\memcache\index.php on line 42

Warning: Memcache::get() [memcache.get]: Failed to extract 'connection' variable from object in C:\webserver\htdocs\test\memcache\index.php on line 44

---

然后我在網上找到了這個代碼，它確實有效

<?php
$memcache = new Memcache;
$memcache->connect('localhost', 11211) or die ("Could not connect");

$tmp_object = new stdClass;
$tmp_object->str_attr = 'test';
$tmp_object->int_attr = 123;
// add cache
$memcache->set('key', $tmp_object, false, 30) or die ("Failed to save data at the server");
echo "Store data in the cache (data will expire in 30 seconds)<br/>\n";
// get cache
$get_result = $memcache->get('key');
echo "Data from the cache:<br/>\n";
var_dump($get_result);
?>

---

我怎樣才能從PHP.net中獲取示例？

---

此外，我很想看到任何涉及memcache的emample代碼，你可能想要分享我真的很感激看到一些有用的例子

Answer 1

您是否意識到需要將“memcache_host”替換為您的主機名和/或localhost？ 還是我完全忽略了這一點？ 此外，嘗試telnet localhost 11211 ，然后telnet your-memcache-host-name 11211 ，看看你是否得到相同的結果（你應該）。

Answer 2

如果你想使用Memcached with PHP進行數據庫查詢，這里有一個我用過的例子：

$memcache = new Memcache;
$memcache->connect('127.0.0.1', 11211);
$qry = QUERY;
$C = connection to ur database;
findValue($qry, $c);

    function findValue($qry,$c)
    {
        $id = md5($qry);

         if ($gotten = $memcache->get($id)) {
               echo $id." retrieved from memcached </br> ";
               return $gotten;
         } else {
             ### Daemon running but it was NOT cached
             echo  " from database (was NOT cached)";
             # Never mind - fetch it and store for next time!
             $gotten = dbfetch($qry,$c);
             $memcache->set($id,$gotten);
             return $gotten;
        }
    }

Answer 3

我正在使用php的月經來減少我的數據庫命中做這樣的事情

    $memcache = new Memcache;

    //Ip address and and port number.
    $memcache->connect('192.168.xxx.xxx', 'xxxx');

    //Fetching data from memcache server
    $arrobj = $memcache->get("arrobj");

    if( false == is_array( $arrobj ) ) {

       $arrobj = data retrieve from Database.

       //Storing data in memcache server for 100 sec.
       $memcache->set( "arrobj", $arrobj, MEMCACHE_COMPRESSED, 100 );
    }

您也可以訪問http://php.net/manual/en/memcache.set.php獲取示例！