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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_View
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Abstract.php 19117 2009-11-20 17:44:14Z matthew $
*/
/** Zend_Loader */
require_once 'Zend/Loader.php';
/** Zend_Loader_PluginLoader */
require_once 'Zend/Loader/PluginLoader.php';
/** Zend_View_Interface */
require_once 'Zend/View/Interface.php';
/**
* Abstract class for Zend_View to help enforce private constructs.
*
* @category Zend
* @package Zend_View
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class Zend_View_Abstract implements Zend_View_Interface
{
/**
* Path stack for script, helper, and filter directories.
*
* @var array
*/
private $_path = array(
'script' => array(),
'helper' => array(),
'filter' => array(),
);
/**
* Script file name to execute
*
* @var string
*/
private $_file = null;
/**
* Instances of helper objects.
*
* @var array
*/
private $_helper = array();
/**
* Map of helper => class pairs to help in determining helper class from
* name
* @var array
*/
private $_helperLoaded = array();
/**
* Map of helper => classfile pairs to aid in determining helper classfile
* @var array
*/
private $_helperLoadedDir = array();
/**
* Stack of Zend_View_Filter names to apply as filters.
* @var array
*/
private $_filter = array();
/**
* Stack of Zend_View_Filter objects that have been loaded
* @var array
*/
private $_filterClass = array();
/**
* Map of filter => class pairs to help in determining filter class from
* name
* @var array
*/
private $_filterLoaded = array();
/**
* Map of filter => classfile pairs to aid in determining filter classfile
* @var array
*/
private $_filterLoadedDir = array();
/**
* Callback for escaping.
*
* @var string
*/
private $_escape = 'htmlspecialchars';
/**
* Encoding to use in escaping mechanisms; defaults to latin1 (ISO-8859-1)
* @var string
*/
private $_encoding = 'ISO-8859-1';
/**
* Flag indicating whether or not LFI protection for rendering view scripts is enabled
* @var bool
*/
private $_lfiProtectionOn = true;
/**
* Plugin loaders
* @var array
*/
private $_loaders = array();
/**
* Plugin types
* @var array
*/
private $_loaderTypes = array('filter', 'helper');
/**
* Strict variables flag; when on, undefined variables accessed in the view
* scripts will trigger notices
* @var boolean
*/
private $_strictVars = false;
/**
* Constructor.
*
* @param array $config Configuration key-value pairs.
*/
public function __construct($config = array())
{
// set inital paths and properties
$this->setScriptPath(null);
// $this->setHelperPath(null);
$this->setFilterPath(null);
// user-defined escaping callback
if (array_key_exists('escape', $config)) {
$this->setEscape($config['escape']);
}
// encoding
if (array_key_exists('encoding', $config)) {
$this->setEncoding($config['encoding']);
}
// base path
if (array_key_exists('basePath', $config)) {
$prefix = 'Zend_View';
if (array_key_exists('basePathPrefix', $config)) {
$prefix = $config['basePathPrefix'];
}
$this->setBasePath($config['basePath'], $prefix);
}
// user-defined view script path
if (array_key_exists('scriptPath', $config)) {
$this->addScriptPath($config['scriptPath']);
}
// user-defined helper path
if (array_key_exists('helperPath', $config)) {
if (is_array($config['helperPath'])) {
foreach ($config['helperPath'] as $prefix => $path) {
$this->addHelperPath($path, $prefix);
}
} else {
$prefix = 'Zend_View_Helper';
if (array_key_exists('helperPathPrefix', $config)) {
$prefix = $config['helperPathPrefix'];
}
$this->addHelperPath($config['helperPath'], $prefix);
}
}
// user-defined filter path
if (array_key_exists('filterPath', $config)) {
if (is_array($config['filterPath'])) {
foreach ($config['filterPath'] as $prefix => $path) {
$this->addFilterPath($path, $prefix);
}
} else {
$prefix = 'Zend_View_Filter';
if (array_key_exists('filterPathPrefix', $config)) {
$prefix = $config['filterPathPrefix'];
}
$this->addFilterPath($config['filterPath'], $prefix);
}
}
// user-defined filters
if (array_key_exists('filter', $config)) {
$this->addFilter($config['filter']);
}
// strict vars
if (array_key_exists('strictVars', $config)) {
$this->strictVars($config['strictVars']);
}
// LFI protection flag
if (array_key_exists('lfiProtectionOn', $config)) {
$this->setLfiProtection($config['lfiProtectionOn']);
}
$this->init();
}
/**
* Return the template engine object
*
* Returns the object instance, as it is its own template engine
*
* @return Zend_View_Abstract
*/
public function getEngine()
{
return $this;
}
/**
* Allow custom object initialization when extending Zend_View_Abstract or
* Zend_View
*
* Triggered by {@link __construct() the constructor} as its final action.
*
* @return void
*/
public function init()
{
}
/**
* Prevent E_NOTICE for nonexistent values
*
* If {@link strictVars()} is on, raises a notice.
*
* @param string $key
* @return null
*/
public function __get($key)
{
if ($this->_strictVars) {
trigger_error('Key "' . $key . '" does not exist', E_USER_NOTICE);
}
return null;
}
/**
* Allows testing with empty() and isset() to work inside
* templates.
*
* @param string $key
* @return boolean
*/
public function __isset($key)
{
if ('_' != substr($key, 0, 1)) {
return isset($this->$key);
}
return false;
}
/**
* Directly assigns a variable to the view script.
*
* Checks first to ensure that the caller is not attempting to set a
* protected or private member (by checking for a prefixed underscore); if
* not, the public member is set; otherwise, an exception is raised.
*
* @param string $key The variable name.
* @param mixed $val The variable value.
* @return void
* @throws Zend_View_Exception if an attempt to set a private or protected
* member is detected
*/
public function __set($key, $val)
{
if ('_' != substr($key, 0, 1)) {
$this->$key = $val;
return;
}
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('Setting private or protected class members is not allowed', $this);
}
/**
* Allows unset() on object properties to work
*
* @param string $key
* @return void
*/
public function __unset($key)
{
if ('_' != substr($key, 0, 1) && isset($this->$key)) {
unset($this->$key);
}
}
/**
* Accesses a helper object from within a script.
*
* If the helper class has a 'view' property, sets it with the current view
* object.
*
* @param string $name The helper name.
* @param array $args The parameters for the helper.
* @return string The result of the helper output.
*/
public function __call($name, $args)
{
// is the helper already loaded?
$helper = $this->getHelper($name);
// call the helper method
return call_user_func_array(
array($helper, $name),
$args
);
}
/**
* Given a base path, sets the script, helper, and filter paths relative to it
*
* Assumes a directory structure of:
* <code>
* basePath/
* scripts/
* helpers/
* filters/
* </code>
*
* @param string $path
* @param string $prefix Prefix to use for helper and filter paths
* @return Zend_View_Abstract
*/
public function setBasePath($path, $classPrefix = 'Zend_View')
{
$path = rtrim($path, '/');
$path = rtrim($path, '\\');
$path .= DIRECTORY_SEPARATOR;
$classPrefix = rtrim($classPrefix, '_') . '_';
$this->setScriptPath($path . 'scripts');
$this->setHelperPath($path . 'helpers', $classPrefix . 'Helper');
$this->setFilterPath($path . 'filters', $classPrefix . 'Filter');
return $this;
}
/**
* Given a base path, add script, helper, and filter paths relative to it
*
* Assumes a directory structure of:
* <code>
* basePath/
* scripts/
* helpers/
* filters/
* </code>
*
* @param string $path
* @param string $prefix Prefix to use for helper and filter paths
* @return Zend_View_Abstract
*/
public function addBasePath($path, $classPrefix = 'Zend_View')
{
$path = rtrim($path, '/');
$path = rtrim($path, '\\');
$path .= DIRECTORY_SEPARATOR;
$classPrefix = rtrim($classPrefix, '_') . '_';
$this->addScriptPath($path . 'scripts');
$this->addHelperPath($path . 'helpers', $classPrefix . 'Helper');
$this->addFilterPath($path . 'filters', $classPrefix . 'Filter');
return $this;
}
/**
* Adds to the stack of view script paths in LIFO order.
*
* @param string|array The directory (-ies) to add.
* @return Zend_View_Abstract
*/
public function addScriptPath($path)
{
$this->_addPath('script', $path);
return $this;
}
/**
* Resets the stack of view script paths.
*
* To clear all paths, use Zend_View::setScriptPath(null).
*
* @param string|array The directory (-ies) to set as the path.
* @return Zend_View_Abstract
*/
public function setScriptPath($path)
{
$this->_path['script'] = array();
$this->_addPath('script', $path);
return $this;
}
/**
* Return full path to a view script specified by $name
*
* @param string $name
* @return false|string False if script not found
* @throws Zend_View_Exception if no script directory set
*/
public function getScriptPath($name)
{
try {
$path = $this->_script($name);
return $path;
} catch (Zend_View_Exception $e) {
if (strstr($e->getMessage(), 'no view script directory set')) {
throw $e;
}
return false;
}
}
/**
* Returns an array of all currently set script paths
*
* @return array
*/
public function getScriptPaths()
{
return $this->_getPaths('script');
}
/**
* Set plugin loader for a particular plugin type
*
* @param Zend_Loader_PluginLoader $loader
* @param string $type
* @return Zend_View_Abstract
*/
public function setPluginLoader(Zend_Loader_PluginLoader $loader, $type)
{
$type = strtolower($type);
if (!in_array($type, $this->_loaderTypes)) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception(sprintf('Invalid plugin loader type "%s"', $type));
}
$this->_loaders[$type] = $loader;
return $this;
}
/**
* Retrieve plugin loader for a specific plugin type
*
* @param string $type
* @return Zend_Loader_PluginLoader
*/
public function getPluginLoader($type)
{
$type = strtolower($type);
if (!in_array($type, $this->_loaderTypes)) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception(sprintf('Invalid plugin loader type "%s"; cannot retrieve', $type));
}
if (!array_key_exists($type, $this->_loaders)) {
$prefix = 'Zend_View_';
$pathPrefix = 'Zend/View/';
$pType = ucfirst($type);
switch ($type) {
case 'filter':
case 'helper':
default:
$prefix .= $pType;
$pathPrefix .= $pType;
$loader = new Zend_Loader_PluginLoader(array(
$prefix => $pathPrefix
));
$this->_loaders[$type] = $loader;
break;
}
}
return $this->_loaders[$type];
}
/**
* Adds to the stack of helper paths in LIFO order.
*
* @param string|array The directory (-ies) to add.
* @param string $classPrefix Class prefix to use with classes in this
* directory; defaults to Zend_View_Helper
* @return Zend_View_Abstract
*/
public function addHelperPath($path, $classPrefix = 'Zend_View_Helper_')
{
return $this->_addPluginPath('helper', $classPrefix, (array) $path);
}
/**
* Resets the stack of helper paths.
*
* To clear all paths, use Zend_View::setHelperPath(null).
*
* @param string|array $path The directory (-ies) to set as the path.
* @param string $classPrefix The class prefix to apply to all elements in
* $path; defaults to Zend_View_Helper
* @return Zend_View_Abstract
*/
public function setHelperPath($path, $classPrefix = 'Zend_View_Helper_')
{
unset($this->_loaders['helper']);
return $this->addHelperPath($path, $classPrefix);
}
/**
* Get full path to a helper class file specified by $name
*
* @param string $name
* @return string|false False on failure, path on success
*/
public function getHelperPath($name)
{
return $this->_getPluginPath('helper', $name);
}
/**
* Returns an array of all currently set helper paths
*
* @return array
*/
public function getHelperPaths()
{
return $this->getPluginLoader('helper')->getPaths();
}
/**
* Get a helper by name
*
* @param string $name
* @return object
*/
public function getHelper($name)
{
return $this->_getPlugin('helper', $name);
}
/**
* Get array of all active helpers
*
* Only returns those that have already been instantiated.
*
* @return array
*/
public function getHelpers()
{
return $this->_helper;
}
/**
* Adds to the stack of filter paths in LIFO order.
*
* @param string|array The directory (-ies) to add.
* @param string $classPrefix Class prefix to use with classes in this
* directory; defaults to Zend_View_Filter
* @return Zend_View_Abstract
*/
public function addFilterPath($path, $classPrefix = 'Zend_View_Filter_')
{
return $this->_addPluginPath('filter', $classPrefix, (array) $path);
}
/**
* Resets the stack of filter paths.
*
* To clear all paths, use Zend_View::setFilterPath(null).
*
* @param string|array The directory (-ies) to set as the path.
* @param string $classPrefix The class prefix to apply to all elements in
* $path; defaults to Zend_View_Filter
* @return Zend_View_Abstract
*/
public function setFilterPath($path, $classPrefix = 'Zend_View_Filter_')
{
unset($this->_loaders['filter']);
return $this->addFilterPath($path, $classPrefix);
}
/**
* Get full path to a filter class file specified by $name
*
* @param string $name
* @return string|false False on failure, path on success
*/
public function getFilterPath($name)
{
return $this->_getPluginPath('filter', $name);
}
/**
* Get a filter object by name
*
* @param string $name
* @return object
*/
public function getFilter($name)
{
return $this->_getPlugin('filter', $name);
}
/**
* Return array of all currently active filters
*
* Only returns those that have already been instantiated.
*
* @return array
*/
public function getFilters()
{
return $this->_filter;
}
/**
* Returns an array of all currently set filter paths
*
* @return array
*/
public function getFilterPaths()
{
return $this->getPluginLoader('filter')->getPaths();
}
/**
* Return associative array of path types => paths
*
* @return array
*/
public function getAllPaths()
{
$paths = $this->_path;
$paths['helper'] = $this->getHelperPaths();
$paths['filter'] = $this->getFilterPaths();
return $paths;
}
/**
* Add one or more filters to the stack in FIFO order.
*
* @param string|array One or more filters to add.
* @return Zend_View_Abstract
*/
public function addFilter($name)
{
foreach ((array) $name as $val) {
$this->_filter[] = $val;
}
return $this;
}
/**
* Resets the filter stack.
*
* To clear all filters, use Zend_View::setFilter(null).
*
* @param string|array One or more filters to set.
* @return Zend_View_Abstract
*/
public function setFilter($name)
{
$this->_filter = array();
$this->addFilter($name);
return $this;
}
/**
* Sets the _escape() callback.
*
* @param mixed $spec The callback for _escape() to use.
* @return Zend_View_Abstract
*/
public function setEscape($spec)
{
$this->_escape = $spec;
return $this;
}
/**
* Set LFI protection flag
*
* @param bool $flag
* @return Zend_View_Abstract
*/
public function setLfiProtection($flag)
{
$this->_lfiProtectionOn = (bool) $flag;
return $this;
}
/**
* Return status of LFI protection flag
*
* @return bool
*/
public function isLfiProtectionOn()
{
return $this->_lfiProtectionOn;
}
/**
* Assigns variables to the view script via differing strategies.
*
* Zend_View::assign('name', $value) assigns a variable called 'name'
* with the corresponding $value.
*
* Zend_View::assign($array) assigns the array keys as variable
* names (with the corresponding array values).
*
* @see __set()
* @param string|array The assignment strategy to use.
* @param mixed (Optional) If assigning a named variable, use this
* as the value.
* @return Zend_View_Abstract Fluent interface
* @throws Zend_View_Exception if $spec is neither a string nor an array,
* or if an attempt to set a private or protected member is detected
*/
public function assign($spec, $value = null)
{
// which strategy to use?
if (is_string($spec)) {
// assign by name and value
if ('_' == substr($spec, 0, 1)) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('Setting private or protected class members is not allowed', $this);
}
$this->$spec = $value;
} elseif (is_array($spec)) {
// assign from associative array
$error = false;
foreach ($spec as $key => $val) {
if ('_' == substr($key, 0, 1)) {
$error = true;
break;
}
$this->$key = $val;
}
if ($error) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('Setting private or protected class members is not allowed', $this);
}
} else {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('assign() expects a string or array, received ' . gettype($spec), $this);
}
return $this;
}
/**
* Return list of all assigned variables
*
* Returns all public properties of the object. Reflection is not used
* here as testing reflection properties for visibility is buggy.
*
* @return array
*/
public function getVars()
{
$vars = get_object_vars($this);
foreach ($vars as $key => $value) {
if ('_' == substr($key, 0, 1)) {
unset($vars[$key]);
}
}
return $vars;
}
/**
* Clear all assigned variables
*
* Clears all variables assigned to Zend_View either via {@link assign()} or
* property overloading ({@link __set()}).
*
* @return void
*/
public function clearVars()
{
$vars = get_object_vars($this);
foreach ($vars as $key => $value) {
if ('_' != substr($key, 0, 1)) {
unset($this->$key);
}
}
}
/**
* Processes a view script and returns the output.
*
* @param string $name The script script name to process.
* @return string The script output.
*/
public function render($name)
{
// find the script file name using the parent private method
$this->_file = $this->_script($name);
unset($name); // remove $name from local scope
ob_start();
$this->_run($this->_file);
return $this->_filter(ob_get_clean()); // filter output
}
/**
* Escapes a value for output in a view script.
*
* If escaping mechanism is one of htmlspecialchars or htmlentities, uses
* {@link $_encoding} setting.
*
* @param mixed $var The output to escape.
* @return mixed The escaped value.
*/
public function escape($var)
{
if (in_array($this->_escape, array('htmlspecialchars', 'htmlentities'))) {
return call_user_func($this->_escape, $var, ENT_COMPAT, $this->_encoding);
}
return call_user_func($this->_escape, $var);
}
/**
* Set encoding to use with htmlentities() and htmlspecialchars()
*
* @param string $encoding
* @return Zend_View_Abstract
*/
public function setEncoding($encoding)
{
$this->_encoding = $encoding;
return $this;
}
/**
* Return current escape encoding
*
* @return string
*/
public function getEncoding()
{
return $this->_encoding;
}
/**
* Enable or disable strict vars
*
* If strict variables are enabled, {@link __get()} will raise a notice
* when a variable is not defined.
*
* Use in conjunction with {@link Zend_View_Helper_DeclareVars the declareVars() helper}
* to enforce strict variable handling in your view scripts.
*
* @param boolean $flag
* @return Zend_View_Abstract
*/
public function strictVars($flag = true)
{
$this->_strictVars = ($flag) ? true : false;
return $this;
}
/**
* Finds a view script from the available directories.
*
* @param $name string The base name of the script.
* @return void
*/
protected function _script($name)
{
if ($this->isLfiProtectionOn() && preg_match('#\.\.[\\\/]#', $name)) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('Requested scripts may not include parent directory traversal ("../", "..\\" notation)');
}
if (0 == count($this->_path['script'])) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('no view script directory set; unable to determine location for view script',
$this);
}
foreach ($this->_path['script'] as $dir) {
if (is_readable($dir . $name)) {
return $dir . $name;
}
}
require_once 'Zend/View/Exception.php';
$message = "script '$name' not found in path ("
. implode(PATH_SEPARATOR, $this->_path['script'])
. ")";
throw new Zend_View_Exception($message, $this);
}
/**
* Applies the filter callback to a buffer.
*
* @param string $buffer The buffer contents.
* @return string The filtered buffer.
*/
private function _filter($buffer)
{
// loop through each filter class
foreach ($this->_filter as $name) {
// load and apply the filter class
$filter = $this->getFilter($name);
$buffer = call_user_func(array($filter, 'filter'), $buffer);
}
// done!
return $buffer;
}
/**
* Adds paths to the path stack in LIFO order.
*
* Zend_View::_addPath($type, 'dirname') adds one directory
* to the path stack.
*
* Zend_View::_addPath($type, $array) adds one directory for
* each array element value.
*
* In the case of filter and helper paths, $prefix should be used to
* specify what class prefix to use with the given path.
*
* @param string $type The path type ('script', 'helper', or 'filter').
* @param string|array $path The path specification.
* @param string $prefix Class prefix to use with path (helpers and filters
* only)
* @return void
*/
private function _addPath($type, $path, $prefix = null)
{
foreach ((array) $path as $dir) {
// attempt to strip any possible separator and
// append the system directory separator
$dir = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $dir);
$dir = rtrim($dir, DIRECTORY_SEPARATOR . DIRECTORY_SEPARATOR)
. DIRECTORY_SEPARATOR;
switch ($type) {
case 'script':
// add to the top of the stack.
array_unshift($this->_path[$type], $dir);
break;
case 'filter':
case 'helper':
default:
// add as array with prefix and dir keys
array_unshift($this->_path[$type], array('prefix' => $prefix, 'dir' => $dir));
break;
}
}
}
/**
* Resets the path stack for helpers and filters.
*
* @param string $type The path type ('helper' or 'filter').
* @param string|array $path The directory (-ies) to set as the path.
* @param string $classPrefix Class prefix to apply to elements of $path
*/
private function _setPath($type, $path, $classPrefix = null)
{
$dir = DIRECTORY_SEPARATOR . ucfirst($type) . DIRECTORY_SEPARATOR;
switch ($type) {
case 'script':
$this->_path[$type] = array(dirname(__FILE__) . $dir);
$this->_addPath($type, $path);
break;
case 'filter':
case 'helper':
default:
$this->_path[$type] = array(array(
'prefix' => 'Zend_View_' . ucfirst($type) . '_',
'dir' => dirname(__FILE__) . $dir
));
$this->_addPath($type, $path, $classPrefix);
break;
}
}
/**
* Return all paths for a given path type
*
* @param string $type The path type ('helper', 'filter', 'script')
* @return array
*/
private function _getPaths($type)
{
return $this->_path[$type];
}
/**
* Register helper class as loaded
*
* @param string $name
* @param string $class
* @param string $file path to class file
* @return void
*/
private function _setHelperClass($name, $class, $file)
{
$this->_helperLoadedDir[$name] = $file;
$this->_helperLoaded[$name] = $class;
}
/**
* Register filter class as loaded
*
* @param string $name
* @param string $class
* @param string $file path to class file
* @return void
*/
private function _setFilterClass($name, $class, $file)
{
$this->_filterLoadedDir[$name] = $file;
$this->_filterLoaded[$name] = $class;
}
/**
* Add a prefixPath for a plugin type
*
* @param string $type
* @param string $classPrefix
* @param array $paths
* @return Zend_View_Abstract
*/
private function _addPluginPath($type, $classPrefix, array $paths)
{
$loader = $this->getPluginLoader($type);
foreach ($paths as $path) {
$loader->addPrefixPath($classPrefix, $path);
}
return $this;
}
/**
* Get a path to a given plugin class of a given type
*
* @param string $type
* @param string $name
* @return string|false
*/
private function _getPluginPath($type, $name)
{
$loader = $this->getPluginLoader($type);
if ($loader->isLoaded($name)) {
return $loader->getClassPath($name);
}
try {
$loader->load($name);
return $loader->getClassPath($name);
} catch (Zend_Loader_Exception $e) {
return false;
}
}
/**
* Retrieve a plugin object
*
* @param string $type
* @param string $name
* @return object
*/
private function _getPlugin($type, $name)
{
$name = ucfirst($name);
switch ($type) {
case 'filter':
$storeVar = '_filterClass';
$store = $this->_filterClass;
break;
case 'helper':
$storeVar = '_helper';
$store = $this->_helper;
break;
}
if (!isset($store[$name])) {
$class = $this->getPluginLoader($type)->load($name);
$store[$name] = new $class();
if (method_exists($store[$name], 'setView')) {
$store[$name]->setView($this);
}
}
$this->$storeVar = $store;
return $store[$name];
}
/**
* Use to include the view script in a scope that only allows public
* members.
*
* @return mixed
*/
abstract protected function _run();
}
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