The wrapper of PHP-Memcached

memcached.caching.php

/**
 * There are two PHP Memcache extensions available from the PHP Extension Community Library: PHP Memcached and PHP Memcache.
 * This wrapper is for "PHP Memcached"
 *
 * Usuage: see in the comment
 * 
 * 
 */
class CacheMemcached
{

    public $iTtl = 600; // Time To Live (number of second)
    public $bEnabled = true; // Memcached enabled?
    public $oCache = null;

    // constructor
    public function __construct()
    {
        if (class_exists('Memcached')) {
            $this->oCache = new Memcached();
            if (!$this->oCache->addServer('localhost', 11211)) { 
                $this->oCache = null;
                $this->bEnabled = false;
            }
        } else {
            $this->bEnabled = false;
        }
    }

    // get data from cache server
    public function getData($sKey)
    {
        $vData = $this->oCache->get($sKey);
        return false === $vData ? null : $vData;
    }

    // save data to cache server
    public function setData($sKey, $vData)
    {
        return $this->oCache->set($sKey, $vData, $this->iTtl);
    }

    // delete data from cache server
    public function delData($sKey)
    {
        return $this->oCache->delete($sKey);
    }

    // flush data from cache server
    public function flushData()
    {
        return $this->oCache->flush();
    }

}

An example to use this Wrapper:

$key = 'MYDATA';

$mData = '';

$oCache = new CacheMemcached();
if ($oCache->bEnabled) {
    $mData = $oCache->getData($key);
}
else {
    // your code to fetch data ...
    $mData = fetchMyData();
    if ($oCache->bEnabled) { // if Memcache enabled
        $oCache->setData($key, $mData);
    }
}
echo $mData;