一个简单的memcache类

<?php 
 
class cache_memcache { 
 
    private $_memcached; 
    protected $_memcached_conf = array( 
        'default_host' => '127.0.0.1', 
        'default_port' => 11211, 
        'default_weight' => 1, 
    ); 
 
    public function __construct() { 
 
        $this->_memcached = new Memcache($this->_memcached_conf); 
        $this->_memcached->addserver('127.0.0.1', '11211'); 
    } 
 
    // Save data into cache 
    public function save($key, $data, $ttl = 3600) { 
        if (get_class($this->_memcached) == 'Memcached') { 
            return $this->_memcached->set($key, array($data, time(), $ttl), $ttl); 
        } else if (get_class($this->_memcached) == 'Memcache') { 
            return $this->_memcached->set($key, array($data, time(), $ttl), 0, $ttl); 
        } 
 
        return false; 
    } 
 
    // Fetch data from cache 
 
    public function get($key) { 
        $data = $this->_memcached->get($key); 
        return (is_array($data)) ? $data[0] : false; 
    } 
 
    // Detele data from cache 
    public function delete($key) { 
        return $this->_memcached->delete($key); 
    } 
 
    //   
    // clean will marks all the items as expired, 
    so occupied memory will be overwritten by new items. 
    public function clean() { 
        return $this->_memcached->flush(); 
    } 
 
    public function ServerStatus() { 
        $server_status = $this->_memcached->getstats(); 
        echo "<table border='1'>"; 
        echo "<tr><td>Memcache Server version:</td><td> " . $server_status["version"] . "</td>
        </tr>"; 
    echo "<tr><td>Process id of this server process </td><td>" . $server_status["pid"] . "</td>
    </tr>"; 
        echo "<tr><td>Number of seconds this server has been running </td>
        <td>" . $server_status["uptime"] . "</td></tr>"; 
        echo "<tr><td>Accumulated user time for this process </td>
        <td>" . $server_status["rusage_user"] . " seconds</td></tr>"; 
        echo "<tr><td>Accumulated system time for this process </td>
        <td>" . $server_status["rusage_system"] . " seconds</td></tr>";
        echo "<tr><td>Total number of items stored by this server ever since it started</td>
        <td>" . $server_status["total_items"] . "</td></tr>"; 
        echo "<tr><td>Number of open connections </td>
        <td>" . $server_status["curr_connections"] . "</td></tr>"; 
        echo "<tr>
        <td>Total number of connections opened since the server started running </td>
        <td>" . $server_status["total_connections"] . "</td></tr>"; 
        echo "<tr><td>Number of connection structures allocated by the server </td>
        <td>" . $server_status["connection_structures"] . "</td></tr>"; 
        echo "<tr><td>Cumulative number of retrieval requests </td>
        <td>" . $server_status["cmd_get"] . "</td></tr>"; 
        echo "<tr><td> Cumulative number of storage requests </td>
        <td>" . $server_status["cmd_set"] . "</td></tr>"; 
     $percCacheHit = ((real) $server_status["get_hits"] / (real) $server_status["cmd_get"] * 100); 
        $percCacheHit = round($percCacheHit, 3); 
        $percCacheMiss = 100 - $percCacheHit; 
        echo "<tr><td>Number of keys that have been requested and found present </td>
        <td>" . $server_status["get_hits"] . " ($percCacheHit%)</td></tr>"; 
        echo "<tr><td>Number of items that have been requested and not found </td>
        <td>" . $server_status["get_misses"] . "($percCacheMiss%)</td></tr>"; 
        $MBRead = (real) $server_status["bytes_read"] / (1024 * 1024); 
        echo "<tr><td>Total number of bytes read by this server from network </td>
        <td>" . $MBRead . " Mega Bytes</td></tr>"; 
        $MBWrite = (real) $server_status["bytes_written"] / (1024 * 1024); 
        echo "<tr><td>Total number of bytes sent by this server to network </td>
        <td>" . $MBWrite . " Mega Bytes</td></tr>"; 
        $MBSize = (real) $server_status["limit_maxbytes"] / (1024 * 1024); 
        echo "<tr><td>Number of bytes this server is allowed to use for storage.</td>
        <td>" . $MBSize . " Mega Bytes</td></tr>"; 
        echo "<tr>
        <td>Number of valid items removed from cache to free memory for new items.</td>
        <td>" . $server_status["evictions"] . "</td>
        </tr>"; 
        echo "</table>"; 
    } 
 
} 
 
?>

require_once'memcache2.php'; 
$getData = new cache_memcache (); 
$res = $getData->get("Shibly"); 
if ($res) { 
    echo $res; 
} else { 
    echo "No data to display. The cache may be destroyed"; 
}
 
 
 
$srv_stat = new cache_memcache(); 
$srv_stat->ServerStatus();
 
 
require_once('memcache2.php'); 
$setData = new cache_memcache(); 
$data =  $setData->save("Shibly","Hello there ! you've stored me in a memcached server !"); 
 
if($data) 
{ 
    echo "You've successfully stored data in the memcached server.
     Please Run the example_get_cache.php file to retrive your data";
} 
 
else{ 
    echo "There is something wrong with your caching server"; 
}