<?php

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/**

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* SimplePie

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*

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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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*

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* Copyright (c) 2004-2016, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors

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* All rights reserved.

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*

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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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*

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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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*

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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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*

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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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*

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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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*

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* @package SimplePie

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* @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue

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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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/**

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* Handles creating objects and calling methods

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*

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* Access this via {@see SimplePie::get_registry()}

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*

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* @package SimplePie

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*/

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class SimplePie_Registry

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{

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/**

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* Default class mapping

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*

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* Overriding classes *must* subclass these.

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*

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* @var array

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*/

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protected $default = array(

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'Cache' => 'SimplePie_Cache',

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'Locator' => 'SimplePie_Locator',

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'Parser' => 'SimplePie_Parser',

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'File' => 'SimplePie_File',

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'Sanitize' => 'SimplePie_Sanitize',

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'Item' => 'SimplePie_Item',

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'Author' => 'SimplePie_Author',

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'Category' => 'SimplePie_Category',

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'Enclosure' => 'SimplePie_Enclosure',

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'Caption' => 'SimplePie_Caption',

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'Copyright' => 'SimplePie_Copyright',

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'Credit' => 'SimplePie_Credit',

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'Rating' => 'SimplePie_Rating',

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'Restriction' => 'SimplePie_Restriction',

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'Content_Type_Sniffer' => 'SimplePie_Content_Type_Sniffer',

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'Source' => 'SimplePie_Source',

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'Misc' => 'SimplePie_Misc',

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'XML_Declaration_Parser' => 'SimplePie_XML_Declaration_Parser',

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'Parse_Date' => 'SimplePie_Parse_Date',

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);

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/**

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* Class mapping

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*

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* @see register()

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* @var array

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*/

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protected $classes = array();

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/**

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* Legacy classes

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*

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* @see register()

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* @var array

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*/

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protected $legacy = array();

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/**

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* Constructor

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*

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* No-op

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*/

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public function __construct() { }

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/**

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* Register a class

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*

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* @param string $type See {@see $default} for names

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* @param string $class Class name, must subclass the corresponding default

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* @param bool $legacy Whether to enable legacy support for this class

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* @return bool Successfulness

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*/

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public function register($type, $class, $legacy = false)

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{

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if (!@is_subclass_of($class, $this->default[$type]))

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{

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return false;

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}

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$this->classes[$type] = $class;

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if ($legacy)

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{

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$this->legacy[] = $class;

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}

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return true;

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}

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/**

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* Get the class registered for a type

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*

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* Where possible, use {@see create()} or {@see call()} instead

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*

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* @param string $type

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* @return string|null

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*/

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public function get_class($type)

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{

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if (!empty($this->classes[$type]))

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{

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return $this->classes[$type];

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}

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if (!empty($this->default[$type]))

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{

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return $this->default[$type];

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}

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return null;

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}

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/**

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* Create a new instance of a given type

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*

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* @param string $type

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* @param array $parameters Parameters to pass to the constructor

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* @return object Instance of class

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*/

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public function &create($type, $parameters = array())

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{

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$class = $this->get_class($type);

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if (in_array($class, $this->legacy))

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{

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switch ($type)

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{

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case 'locator':

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// Legacy: file, timeout, useragent, file_class, max_checked_feeds, content_type_sniffer_class

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// Specified: file, timeout, useragent, max_checked_feeds

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$replacement = array($this->get_class('file'), $parameters[3], $this->get_class('content_type_sniffer'));

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array_splice($parameters, 3, 1, $replacement);

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break;

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}

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}

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if (!method_exists($class, '__construct'))

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{

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$instance = new $class;

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}

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else

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{

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$reflector = new ReflectionClass($class);

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$instance = $reflector->newInstanceArgs($parameters);

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}

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if (method_exists($instance, 'set_registry'))

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{

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$instance->set_registry($this);

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}

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return $instance;

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}

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/**

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* Call a static method for a type

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*

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* @param string $type

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* @param string $method

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* @param array $parameters

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* @return mixed

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*/

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public function &call($type, $method, $parameters = array())

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{

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$class = $this->get_class($type);

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if (in_array($class, $this->legacy))

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{

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switch ($type)

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{

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case 'Cache':

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// For backwards compatibility with old non-static

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// Cache::create() methods

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if ($method === 'get_handler')

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{

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$result = @call_user_func_array(array($class, 'create'), $parameters);

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return $result;

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}

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break;

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}

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}

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$result = call_user_func_array(array($class, $method), $parameters);

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return $result;

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}

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}

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