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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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* Used to create cache objects

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* This class can be overloaded with {@see SimplePie::set_cache_class()},

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* although the preferred way is to create your own handler

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* via {@see register()}

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* @package SimplePie

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* @subpackage Caching

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class SimplePie_Cache

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{

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/**

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* Cache handler classes

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* These receive 3 parameters to their constructor, as documented in

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* {@see register()}

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* @var array

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protected static $handlers = array(

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'mysql' => 'SimplePie_Cache_MySQL',

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'memcache' => 'SimplePie_Cache_Memcache',

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'memcached' => 'SimplePie_Cache_Memcached',

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'redis' => 'SimplePie_Cache_Redis'

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);

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/**

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* Don't call the constructor. Please.

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private function __construct() { }

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/**

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* Create a new SimplePie_Cache object

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* @param string $location URL location (scheme is used to determine handler)

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* @param string $filename Unique identifier for cache object

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* @param string $extension 'spi' or 'spc'

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* @return SimplePie_Cache_Base Type of object depends on scheme of `$location`

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public static function get_handler($location, $filename, $extension)

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{

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$type = explode(':', $location, 2);

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$type = $type[0];

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if (!empty(self::$handlers[$type]))

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{

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$class = self::$handlers[$type];

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return new $class($location, $filename, $extension);

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}

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return new SimplePie_Cache_File($location, $filename, $extension);

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}

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/**

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* Create a new SimplePie_Cache object

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* @deprecated Use {@see get_handler} instead

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public function create($location, $filename, $extension)

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{

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trigger_error('Cache::create() has been replaced with Cache::get_handler(). Switch to the registry system to use this.', E_USER_DEPRECATED);

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return self::get_handler($location, $filename, $extension);

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}

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/**

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* Register a handler

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* @param string $type DSN type to register for

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* @param string $class Name of handler class. Must implement SimplePie_Cache_Base

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public static function register($type, $class)

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{

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self::$handlers[$type] = $class;

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}

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/**

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* Parse a URL into an array

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* @param string $url

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* @return array

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public static function parse_URL($url)

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{

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$params = parse_url($url);

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$params['extras'] = array();

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if (isset($params['query']))

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{

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parse_str($params['query'], $params['extras']);

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}

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return $params;

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}

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}

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