adding zend project folders into old campcaster.
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naomiaro
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245
library/Zend/Cache.php
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245
library/Zend/Cache.php
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Cache
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* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Cache.php 20096 2010-01-06 02:05:09Z bkarwin $
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*/
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/**
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* @package Zend_Cache
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* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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abstract class Zend_Cache
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{
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/**
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* Standard frontends
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*
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* @var array
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*/
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public static $standardFrontends = array('Core', 'Output', 'Class', 'File', 'Function', 'Page');
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/**
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* Standard backends
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*
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* @var array
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*/
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public static $standardBackends = array('File', 'Sqlite', 'Memcached', 'Apc', 'ZendPlatform', 'Xcache', 'TwoLevels');
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/**
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* Standard backends which implement the ExtendedInterface
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*
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* @var array
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*/
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public static $standardExtendedBackends = array('File', 'Apc', 'TwoLevels', 'Memcached', 'Sqlite');
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/**
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* Only for backward compatibily (may be removed in next major release)
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*
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* @var array
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* @deprecated
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*/
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public static $availableFrontends = array('Core', 'Output', 'Class', 'File', 'Function', 'Page');
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/**
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* Only for backward compatibily (may be removed in next major release)
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*
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* @var array
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* @deprecated
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*/
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public static $availableBackends = array('File', 'Sqlite', 'Memcached', 'Apc', 'ZendPlatform', 'Xcache', 'TwoLevels');
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/**
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* Consts for clean() method
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*/
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const CLEANING_MODE_ALL = 'all';
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const CLEANING_MODE_OLD = 'old';
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const CLEANING_MODE_MATCHING_TAG = 'matchingTag';
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const CLEANING_MODE_NOT_MATCHING_TAG = 'notMatchingTag';
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const CLEANING_MODE_MATCHING_ANY_TAG = 'matchingAnyTag';
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/**
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* Factory
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*
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* @param mixed $frontend frontend name (string) or Zend_Cache_Frontend_ object
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* @param mixed $backend backend name (string) or Zend_Cache_Backend_ object
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* @param array $frontendOptions associative array of options for the corresponding frontend constructor
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* @param array $backendOptions associative array of options for the corresponding backend constructor
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* @param boolean $customFrontendNaming if true, the frontend argument is used as a complete class name ; if false, the frontend argument is used as the end of "Zend_Cache_Frontend_[...]" class name
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* @param boolean $customBackendNaming if true, the backend argument is used as a complete class name ; if false, the backend argument is used as the end of "Zend_Cache_Backend_[...]" class name
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* @param boolean $autoload if true, there will no require_once for backend and frontend (usefull only for custom backends/frontends)
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* @throws Zend_Cache_Exception
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* @return Zend_Cache_Core|Zend_Cache_Frontend
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*/
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public static function factory($frontend, $backend, $frontendOptions = array(), $backendOptions = array(), $customFrontendNaming = false, $customBackendNaming = false, $autoload = false)
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{
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if (is_string($backend)) {
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$backendObject = self::_makeBackend($backend, $backendOptions, $customBackendNaming, $autoload);
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} else {
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if ((is_object($backend)) && (in_array('Zend_Cache_Backend_Interface', class_implements($backend)))) {
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$backendObject = $backend;
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} else {
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self::throwException('backend must be a backend name (string) or an object which implements Zend_Cache_Backend_Interface');
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}
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}
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if (is_string($frontend)) {
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$frontendObject = self::_makeFrontend($frontend, $frontendOptions, $customFrontendNaming, $autoload);
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} else {
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if (is_object($frontend)) {
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$frontendObject = $frontend;
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} else {
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self::throwException('frontend must be a frontend name (string) or an object');
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}
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}
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$frontendObject->setBackend($backendObject);
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return $frontendObject;
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}
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/**
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* Frontend Constructor
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*
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* @param string $backend
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* @param array $backendOptions
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* @param boolean $customBackendNaming
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* @param boolean $autoload
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* @return Zend_Cache_Backend
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*/
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public static function _makeBackend($backend, $backendOptions, $customBackendNaming = false, $autoload = false)
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{
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if (!$customBackendNaming) {
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$backend = self::_normalizeName($backend);
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}
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if (in_array($backend, Zend_Cache::$standardBackends)) {
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// we use a standard backend
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$backendClass = 'Zend_Cache_Backend_' . $backend;
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// security controls are explicit
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require_once str_replace('_', DIRECTORY_SEPARATOR, $backendClass) . '.php';
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} else {
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// we use a custom backend
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if (!preg_match('~^[\w]+$~D', $backend)) {
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Zend_Cache::throwException("Invalid backend name [$backend]");
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}
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if (!$customBackendNaming) {
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// we use this boolean to avoid an API break
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$backendClass = 'Zend_Cache_Backend_' . $backend;
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} else {
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$backendClass = $backend;
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}
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if (!$autoload) {
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$file = str_replace('_', DIRECTORY_SEPARATOR, $backendClass) . '.php';
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if (!(self::_isReadable($file))) {
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self::throwException("file $file not found in include_path");
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}
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require_once $file;
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}
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}
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return new $backendClass($backendOptions);
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}
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/**
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* Backend Constructor
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*
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* @param string $frontend
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* @param array $frontendOptions
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* @param boolean $customFrontendNaming
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* @param boolean $autoload
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* @return Zend_Cache_Core|Zend_Cache_Frontend
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*/
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public static function _makeFrontend($frontend, $frontendOptions = array(), $customFrontendNaming = false, $autoload = false)
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{
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if (!$customFrontendNaming) {
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$frontend = self::_normalizeName($frontend);
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}
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if (in_array($frontend, self::$standardFrontends)) {
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// we use a standard frontend
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// For perfs reasons, with frontend == 'Core', we can interact with the Core itself
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$frontendClass = 'Zend_Cache_' . ($frontend != 'Core' ? 'Frontend_' : '') . $frontend;
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// security controls are explicit
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require_once str_replace('_', DIRECTORY_SEPARATOR, $frontendClass) . '.php';
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} else {
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// we use a custom frontend
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if (!preg_match('~^[\w]+$~D', $frontend)) {
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Zend_Cache::throwException("Invalid frontend name [$frontend]");
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}
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if (!$customFrontendNaming) {
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// we use this boolean to avoid an API break
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$frontendClass = 'Zend_Cache_Frontend_' . $frontend;
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} else {
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$frontendClass = $frontend;
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}
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if (!$autoload) {
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$file = str_replace('_', DIRECTORY_SEPARATOR, $frontendClass) . '.php';
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if (!(self::_isReadable($file))) {
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self::throwException("file $file not found in include_path");
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}
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require_once $file;
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}
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}
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return new $frontendClass($frontendOptions);
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}
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/**
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* Throw an exception
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*
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* Note : for perf reasons, the "load" of Zend/Cache/Exception is dynamic
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* @param string $msg Message for the exception
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* @throws Zend_Cache_Exception
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*/
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public static function throwException($msg, Exception $e = null)
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{
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// For perfs reasons, we use this dynamic inclusion
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require_once 'Zend/Cache/Exception.php';
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throw new Zend_Cache_Exception($msg, 0, $e);
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}
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/**
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* Normalize frontend and backend names to allow multiple words TitleCased
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*
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* @param string $name Name to normalize
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* @return string
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*/
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protected static function _normalizeName($name)
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{
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$name = ucfirst(strtolower($name));
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$name = str_replace(array('-', '_', '.'), ' ', $name);
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$name = ucwords($name);
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$name = str_replace(' ', '', $name);
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return $name;
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}
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/**
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* Returns TRUE if the $filename is readable, or FALSE otherwise.
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* This function uses the PHP include_path, where PHP's is_readable()
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* does not.
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*
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* Note : this method comes from Zend_Loader (see #ZF-2891 for details)
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*
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* @param string $filename
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* @return boolean
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*/
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private static function _isReadable($filename)
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{
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if (!$fh = @fopen($filename, 'r', true)) {
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return false;
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}
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@fclose($fh);
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return true;
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}
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}
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