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+<?php
+/**
+ * Container for all Memcache-based cache methods. Inherits additional methods from <CacheCore>. Adheres
+ * to the ICacheCore interface.
+ *
+ * @version 2012.04.17
+ * @copyright 2006-2012 Ryan Parman
+ * @copyright 2006-2010 Foleeo, Inc.
+ * @copyright 2012 Amazon.com, Inc. or its affiliates.
+ * @copyright 2008-2010 Contributors
+ * @license http://opensource.org/licenses/bsd-license.php Simplified BSD License
+ * @link http://github.com/skyzyx/cachecore CacheCore
+ * @link http://getcloudfusion.com CloudFusion
+ * @link http://php.net/memcache Memcache
+ * @link http://php.net/memcached Memcached
+ */
+class CacheMC extends CacheCore implements ICacheCore
+{
+ /**
+ * Holds the Memcache object.
+ */
+ var $memcache = null;
+
+ /**
+ * Whether the Memcached extension is being used (as opposed to Memcache).
+ */
+ var $is_memcached = false;
+
+
+ /*%******************************************************************************************%*/
+ // CONSTRUCTOR
+
+ /**
+ * Constructs a new instance of this class.
+ *
+ * @param string $name (Required) A name to uniquely identify the cache object.
+ * @param string $location (Optional) The location to store the cache object in. This may vary by cache method. The default value is NULL.
+ * @param integer $expires (Optional) The number of seconds until a cache object is considered stale. The default value is 0.
+ * @param boolean $gzip (Optional) Whether data should be gzipped before being stored. The default value is true.
+ * @return object Reference to the cache object.
+ */
+ public function __construct($name, $location = null, $expires = 0, $gzip = true)
+ {
+ parent::__construct($name, null, $expires, $gzip);
+ $this->id = $this->name;
+
+ // Prefer Memcached over Memcache.
+ if (class_exists('Memcached'))
+ {
+ $this->memcache = new Memcached();
+ $this->is_memcached = true;
+ }
+ elseif (class_exists('Memcache'))
+ {
+ $this->memcache = new Memcache();
+ }
+ else
+ {
+ return false;
+ }
+
+ // Enable compression, if available
+ if ($this->gzip)
+ {
+ if ($this->is_memcached)
+ {
+ $this->memcache->setOption(Memcached::OPT_COMPRESSION, true);
+ }
+ else
+ {
+ $this->gzip = MEMCACHE_COMPRESSED;
+ }
+ }
+
+ // Process Memcached servers.
+ if (isset($location) && sizeof($location) > 0)
+ {
+ foreach ($location as $loc)
+ {
+ if (isset($loc['port']) && !empty($loc['port']))
+ {
+ $this->memcache->addServer($loc['host'], $loc['port']);
+ }
+ else
+ {
+ $this->memcache->addServer($loc['host'], 11211);
+ }
+ }
+ }
+
+ return $this;
+ }
+
+ /**
+ * Creates a new cache.
+ *
+ * @param mixed $data (Required) The data to cache.
+ * @return boolean Whether the operation was successful.
+ */
+ public function create($data)
+ {
+ if ($this->is_memcached)
+ {
+ return $this->memcache->set($this->id, $data, $this->expires);
+ }
+ return $this->memcache->set($this->id, $data, $this->gzip, $this->expires);
+ }
+
+ /**
+ * Reads a cache.
+ *
+ * @return mixed Either the content of the cache object, or boolean `false`.
+ */
+ public function read()
+ {
+ if ($this->is_memcached)
+ {
+ return $this->memcache->get($this->id);
+ }
+ return $this->memcache->get($this->id, $this->gzip);
+ }
+
+ /**
+ * Updates an existing cache.
+ *
+ * @param mixed $data (Required) The data to cache.
+ * @return boolean Whether the operation was successful.
+ */
+ public function update($data)
+ {
+ if ($this->is_memcached)
+ {
+ return $this->memcache->replace($this->id, $data, $this->expires);
+ }
+ return $this->memcache->replace($this->id, $data, $this->gzip, $this->expires);
+ }
+
+ /**
+ * Deletes a cache.
+ *
+ * @return boolean Whether the operation was successful.
+ */
+ public function delete()
+ {
+ return $this->memcache->delete($this->id);
+ }
+
+ /**
+ * Implemented here, but always returns `false`. Memcache manages its own expirations.
+ *
+ * @return boolean Whether the cache is expired or not.
+ */
+ public function is_expired()
+ {
+ return false;
+ }
+
+ /**
+ * Implemented here, but always returns `false`. Memcache manages its own expirations.
+ *
+ * @return mixed Either the Unix time stamp of the cache creation, or boolean `false`.
+ */
+ public function timestamp()
+ {
+ return false;
+ }
+
+ /**
+ * Implemented here, but always returns `false`. Memcache manages its own expirations.
+ *
+ * @return boolean Whether the operation was successful.
+ */
+ public function reset()
+ {
+ return false;
+ }
+}
+
+
+/*%******************************************************************************************%*/
+// EXCEPTIONS
+
+class CacheMC_Exception extends CacheCore_Exception {}