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<?php

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/**

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* SimplePie

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* A PHP-Based RSS and Atom Feed Framework.

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* Takes the hard work out of managing a complete RSS/Atom solution.

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* Redistribution and use in source and binary forms, with or without modification, are

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* permitted provided that the following conditions are met:

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* * Redistributions of source code must retain the above copyright notice, this list of

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* conditions and the following disclaimer.

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* * Redistributions in binary form must reproduce the above copyright notice, this list

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* of conditions and the following disclaimer in the documentation and/or other materials

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* provided with the distribution.

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* * Neither the name of the SimplePie Team nor the names of its contributors may be used

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* to endorse or promote products derived from this software without specific prior

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* written permission.

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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS

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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY

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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS

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* AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

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* POSSIBILITY OF SUCH DAMAGE.

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* @package SimplePie

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* @author Ryan Parman

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* @author Sam Sneddon

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* @author Ryan McCue

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* @link http://simplepie.org/ SimplePie

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* @license http://www.opensource.org/licenses/bsd-license.php BSD License

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/**

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* Caches data to memcache

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* Registered for URLs with the "memcache" protocol

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* For example, `memcache://localhost:11211/?timeout=3600&prefix=sp_` will

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* connect to memcache on `localhost` on port 11211. All tables will be

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* prefixed with `sp_` and data will expire after 3600 seconds

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* @package SimplePie

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* @subpackage Caching

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* @uses Memcache

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class SimplePie_Cache_Memcache implements SimplePie_Cache_Base

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{

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/**

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* Memcache instance

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* @var Memcache

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protected $cache;

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/**

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* Options

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* @var array

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protected $options;

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/**

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* Cache name

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* @var string

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protected $name;

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/**

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* Create a new cache object

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* @param string $location Location string (from SimplePie::$cache_location)

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* @param string $name Unique ID for the cache

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* @param string $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data

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public function __construct($location, $name, $type)

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{

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$this->options = array(

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'host' => '127.0.0.1',

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'port' => 11211,

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'extras' => array(

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'timeout' => 3600, // one hour

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'prefix' => 'simplepie_',

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);

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$this->options = SimplePie_Misc::array_merge_recursive($this->options, SimplePie_Cache::parse_URL($location));

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$this->name = $this->options['extras']['prefix'] . md5("$name:$type");

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$this->cache = new Memcache();

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$this->cache->addServer($this->options['host'], (int) $this->options['port']);

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}

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/**

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* Save data to the cache

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* @param array|SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property

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* @return bool Successfulness

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public function save($data)

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{

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if ($data instanceof SimplePie)

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{

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$data = $data->data;

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}

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return $this->cache->set($this->name, serialize($data), MEMCACHE_COMPRESSED, (int) $this->options['extras']['timeout']);

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}

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/**

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* Retrieve the data saved to the cache

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* @return array Data for SimplePie::$data

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public function load()

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{

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$data = $this->cache->get($this->name);

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if ($data !== false)

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{

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return unserialize($data);

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}

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return false;

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}

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/**

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* Retrieve the last modified time for the cache

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* @return int Timestamp

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public function mtime()

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{

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$data = $this->cache->get($this->name);

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if ($data !== false)

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{

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// essentially ignore the mtime because Memcache expires on its own

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return time();

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}

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return false;

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}

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/**

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* Set the last modified time to the current time

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* @return bool Success status

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public function touch()

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{

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$data = $this->cache->get($this->name);

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if ($data !== false)

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{

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return $this->cache->set($this->name, $data, MEMCACHE_COMPRESSED, (int) $this->options['extras']['timeout']);

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}

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return false;

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}

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/**

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* Remove the cache

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* @return bool Success status

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public function unlink()

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{

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return $this->cache->delete($this->name, 0);

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}

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}

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