php封装的smarty类完整实例

<?php
/**
 * project:   smarty: the php compiling template engine
 * file:    smarty.class.php
 * svn:     $id: smarty.class.php 4848 2014-06-08 18:12:09z uwe.tews@googlemail.com $
 * this library is free software; you can redistribute it and/or
 * modify it under the terms of the gnu lesser general public
 * license as published by the free software foundation; either
 * version 2.1 of the license, or (at your option) any later version.
 * this library is distributed in the hope that it will be useful,
 * but without any warranty; without even the implied warranty of
 * merchantability or fitness for a particular purpose. see the gnu
 * lesser general public license for more details.
 * you should have received a copy of the gnu lesser general public
 * license along with this library; if not, write to the free software
 * foundation, inc., 59 temple place, suite 330, boston, ma 02111-1307 usa
 * for questions, help, comments, discussion, etc., please join the
 * smarty mailing list. send a blank e-mail to
 * smarty-discussion-subscribe@googlegroups.com
 *
 * @link   http://www.smarty.net/
 * @copyright 2008 new digital group, inc.
 * @author  monte ohrt <monte at ohrt dot com>
 * @author  uwe tews
 * @author  rodney rehm
 * @package  smarty
 * @version  3.1.19
 */
/**
 * define shorthand directory separator constant
 */
if (!defined('ds')) {
  define('ds', directory_separator);
}
/**
 * set smarty_dir to absolute path to smarty library files.
 * sets smarty_dir only if user application has not already defined it.
 */
if (!defined('smarty_dir')) {
  define('smarty_dir', dirname(__file__) . ds);
}
/**
 * set smarty_sysplugins_dir to absolute path to smarty internal plugins.
 * sets smarty_sysplugins_dir only if user application has not already defined it.
 */
if (!defined('smarty_sysplugins_dir')) {
  define('smarty_sysplugins_dir', smarty_dir . 'sysplugins' . ds);
}
if (!defined('smarty_plugins_dir')) {
  define('smarty_plugins_dir', smarty_dir . 'plugins' . ds);
}
if (!defined('smarty_mbstring')) {
  define('smarty_mbstring', function_exists('mb_split'));
}
if (!defined('smarty_resource_char_set')) {
  // utf-8 can only be done properly when mbstring is available!
  /**
   * @deprecated in favor of smarty::$_charset
   */
  define('smarty_resource_char_set', smarty_mbstring ? 'utf-8' : 'iso-8859-1');
}
if (!defined('smarty_resource_date_format')) {
  /**
   * @deprecated in favor of smarty::$_date_format
   */
  define('smarty_resource_date_format', '%b %e, %y');
}
/**
 * register the class autoloader
 */
if (!defined('smarty_spl_autoload')) {
  define('smarty_spl_autoload', 0);
}
if (smarty_spl_autoload && set_include_path(get_include_path() . path_separator . smarty_sysplugins_dir) !== false) {
  $registeredautoloadfunctions = spl_autoload_functions();
  if (!isset($registeredautoloadfunctions['spl_autoload'])) {
    spl_autoload_register();
  }
} else {
  spl_autoload_register('smartyautoload');
}
/**
 * load always needed external class files
 */
include_once smarty_sysplugins_dir . 'smarty_internal_data.php';
include_once smarty_sysplugins_dir . 'smarty_internal_templatebase.php';
include_once smarty_sysplugins_dir . 'smarty_internal_template.php';
include_once smarty_sysplugins_dir . 'smarty_resource.php';
include_once smarty_sysplugins_dir . 'smarty_internal_resource_file.php';
include_once smarty_sysplugins_dir . 'smarty_cacheresource.php';
include_once smarty_sysplugins_dir . 'smarty_internal_cacheresource_file.php';
/**
 * this is the main smarty class
 *
 * @package smarty
 */
class smarty extends smarty_internal_templatebase
{
  /**#@+
   * constant definitions
   */
  /**
   * smarty version
   */
  const smarty_version = 'smarty-3.1.19';
  /**
   * define variable scopes
   */
  const scope_local = 0;
  const scope_parent = 1;
  const scope_root = 2;
  const scope_global = 3;
  /**
   * define caching modes
   */
  const caching_off = 0;
  const caching_lifetime_current = 1;
  const caching_lifetime_saved = 2;
  /**
   * define constant for clearing cache files be saved expiration datees
   */
  const clear_expired = - 1;
  /**
   * define compile check modes
   */
  const compilecheck_off = 0;
  const compilecheck_on = 1;
  const compilecheck_cachemiss = 2;
  /**
   * modes for handling of "<?php ... ?>" tags in templates.
   */
  const php_passthru = 0; //-> print tags as plain text
  const php_quote = 1; //-> escape tags as entities
  const php_remove = 2; //-> escape tags as entities
  const php_allow = 3; //-> escape tags as entities
  /**
   * filter types
   */
  const filter_post = 'post';
  const filter_pre = 'pre';
  const filter_output = 'output';
  const filter_variable = 'variable';
  /**
   * plugin types
   */
  const plugin_function = 'function';
  const plugin_block = 'block';
  const plugin_compiler = 'compiler';
  const plugin_modifier = 'modifier';
  const plugin_modifiercompiler = 'modifiercompiler';
  /**#@-*/
  /**
   * assigned global tpl vars
   */
  public static $global_tpl_vars = array();
  /**
   * error handler returned by set_error_hanlder() in smarty::muteexpectederrors()
   */
  public static $_previous_error_handler = null;
  /**
   * contains directories outside of smarty_dir that are to be muted by muteexpectederrors()
   */
  public static $_muted_directories = array();
  /**
   * flag denoting if multibyte string functions are available
   */
  public static $_mbstring = smarty_mbstring;
  /**
   * the character set to adhere to (e.g. "utf-8")
   */
  public static $_charset = smarty_resource_char_set;
  /**
   * the date format to be used internally
   * (accepts date() and strftime())
   */
  public static $_date_format = smarty_resource_date_format;
  /**
   * flag denoting if pcre should run in utf-8 mode
   */
  public static $_utf8_modifier = 'u';
  /**
   * flag denoting if operating system is windows
   */
  public static $_is_windows = false;
  /**#@+
   * variables
   */
  /**
   * auto literal on delimiters with whitspace
   *
   * @var boolean
   */
  public $auto_literal = true;
  /**
   * display error on not assigned variables
   *
   * @var boolean
   */
  public $error_unassigned = false;
  /**
   * look up relative filepaths in include_path
   *
   * @var boolean
   */
  public $use_include_path = false;
  /**
   * template directory
   *
   * @var array
   */
  private $template_dir = array();
  /**
   * joined template directory string used in cache keys
   *
   * @var string
   */
  public $joined_template_dir = null;
  /**
   * joined config directory string used in cache keys
   *
   * @var string
   */
  public $joined_config_dir = null;
  /**
   * default template handler
   *
   * @var callable
   */
  public $default_template_handler_func = null;
  /**
   * default config handler
   *
   * @var callable
   */
  public $default_config_handler_func = null;
  /**
   * default plugin handler
   *
   * @var callable
   */
  public $default_plugin_handler_func = null;
  /**
   * compile directory
   *
   * @var string
   */
  private $compile_dir = null;
  /**
   * plugins directory
   *
   * @var array
   */
  private $plugins_dir = array();
  /**
   * cache directory
   *
   * @var string
   */
  private $cache_dir = null;
  /**
   * config directory
   *
   * @var array
   */
  private $config_dir = array();
  /**
   * force template compiling?
   *
   * @var boolean
   */
  public $force_compile = false;
  /**
   * check template for modifications?
   *
   * @var boolean
   */
  public $compile_check = true;
  /**
   * use sub dirs for compiled/cached files?
   *
   * @var boolean
   */
  public $use_sub_dirs = false;
  /**
   * allow ambiguous resources (that are made unique by the resource handler)
   *
   * @var boolean
   */
  public $allow_ambiguous_resources = false;
  /**
   * caching enabled
   *
   * @var boolean
   */
  public $caching = false;
  /**
   * merge compiled includes
   *
   * @var boolean
   */
  public $merge_compiled_includes = false;
  /**
   * template inheritance merge compiled includes
   *
   * @var boolean
   */
  public $inheritance_merge_compiled_includes = true;
  /**
   * cache lifetime in seconds
   *
   * @var integer
   */
  public $cache_lifetime = 3600;
  /**
   * force cache file creation
   *
   * @var boolean
   */
  public $force_cache = false;
  /**
   * set this if you want different sets of cache files for the same
   * templates.
   *
   * @var string
   */
  public $cache_id = null;
  /**
   * set this if you want different sets of compiled files for the same
   * templates.
   *
   * @var string
   */
  public $compile_id = null;
  /**
   * template left-delimiter
   *
   * @var string
   */
  public $left_delimiter = "{";
  /**
   * template right-delimiter
   *
   * @var string
   */
  public $right_delimiter = "}";
  /**#@+
   * security
   */
  /**
   * class name
   * this should be instance of smarty_security.
   *
   * @var string
   * @see smarty_security
   */
  public $security_class = 'smarty_security';
  /**
   * implementation of security class
   *
   * @var smarty_security
   */
  public $security_policy = null;
  /**
   * controls handling of php-blocks
   *
   * @var integer
   */
  public $php_handling = self::php_passthru;
  /**
   * controls if the php template file resource is allowed
   *
   * @var bool
   */
  public $allow_php_templates = false;
  /**
   * should compiled-templates be prevented from being called directly?
   * {@internal
   * currently used by smarty_internal_template only.
   * }}
   *
   * @var boolean
   */
  public $direct_access_security = true;
  /**#@-*/
  /**
   * debug mode
   * setting this to true enables the debug-console.
   *
   * @var boolean
   */
  public $debugging = false;
  /**
   * this determines if debugging is enable-able from the browser.
   * <ul>
   * <li>none => no debugging control allowed</li>
   * <li>url => enable debugging when smarty_debug is found in the url.</li>
   * </ul>
   *
   * @var string
   */
  public $debugging_ctrl = 'none';
  /**
   * name of debugging url-param.
   * only used when $debugging_ctrl is set to 'url'.
   * the name of the url-parameter that activates debugging.
   *
   * @var type
   */
  public $smarty_debug_id = 'smarty_debug';
  /**
   * path of debug template.
   *
   * @var string
   */
  public $debug_tpl = null;
  /**
   * when set, smarty uses this value as error_reporting-level.
   *
   * @var int
   */
  public $error_reporting = null;
  /**
   * internal flag for gettags()
   *
   * @var boolean
   */
  public $get_used_tags = false;
  /**#@+
   * config var settings
   */
  /**
   * controls whether variables with the same name overwrite each other.
   *
   * @var boolean
   */
  public $config_overwrite = true;
  /**
   * controls whether config values of on/true/yes and off/false/no get converted to boolean.
   *
   * @var boolean
   */
  public $config_booleanize = true;
  /**
   * controls whether hidden config sections/vars are read from the file.
   *
   * @var boolean
   */
  public $config_read_hidden = false;
  /**#@-*/
  /**#@+
   * resource locking
   */
  /**
   * locking concurrent compiles
   *
   * @var boolean
   */
  public $compile_locking = true;
  /**
   * controls whether cache resources should emply locking mechanism
   *
   * @var boolean
   */
  public $cache_locking = false;
  /**
   * seconds to wait for acquiring a lock before ignoring the write lock
   *
   * @var float
   */
  public $locking_timeout = 10;
  /**#@-*/
  /**
   * global template functions
   *
   * @var array
   */
  public $template_functions = array();
  /**
   * resource type used if none given
   * must be an valid key of $registered_resources.
   *
   * @var string
   */
  public $default_resource_type = 'file';
  /**
   * caching type
   * must be an element of $cache_resource_types.
   *
   * @var string
   */
  public $caching_type = 'file';
  /**
   * internal config properties
   *
   * @var array
   */
  public $properties = array();
  /**
   * config type
   *
   * @var string
   */
  public $default_config_type = 'file';
  /**
   * cached template objects
   *
   * @var array
   */
  public $template_objects = array();
  /**
   * check if-modified-since headers
   *
   * @var boolean
   */
  public $cache_modified_check = false;
  /**
   * registered plugins
   *
   * @var array
   */
  public $registered_plugins = array();
  /**
   * plugin search order
   *
   * @var array
   */
  public $plugin_search_order = array('function', 'block', 'compiler', 'class');
  /**
   * registered objects
   *
   * @var array
   */
  public $registered_objects = array();
  /**
   * registered classes
   *
   * @var array
   */
  public $registered_classes = array();
  /**
   * registered filters
   *
   * @var array
   */
  public $registered_filters = array();
  /**
   * registered resources
   *
   * @var array
   */
  public $registered_resources = array();
  /**
   * resource handler cache
   *
   * @var array
   */
  public $_resource_handlers = array();
  /**
   * registered cache resources
   *
   * @var array
   */
  public $registered_cache_resources = array();
  /**
   * cache resource handler cache
   *
   * @var array
   */
  public $_cacheresource_handlers = array();
  /**
   * autoload filter
   *
   * @var array
   */
  public $autoload_filters = array();
  /**
   * default modifier
   *
   * @var array
   */
  public $default_modifiers = array();
  /**
   * autoescape variable output
   *
   * @var boolean
   */
  public $escape_html = false;
  /**
   * global internal smarty vars
   *
   * @var array
   */
  public static $_smarty_vars = array();
  /**
   * start time for execution time calculation
   *
   * @var int
   */
  public $start_time = 0;
  /**
   * default file permissions
   *
   * @var int
   */
  public $_file_perms = 0644;
  /**
   * default dir permissions
   *
   * @var int
   */
  public $_dir_perms = 0771;
  /**
   * block tag hierarchy
   *
   * @var array
   */
  public $_tag_stack = array();
  /**
   * self pointer to smarty object
   *
   * @var smarty
   */
  public $smarty;
  /**
   * required by the compiler for bc
   *
   * @var string
   */
  public $_current_file = null;
  /**
   * internal flag to enable parser debugging
   *
   * @var bool
   */
  public $_parserdebug = false;
  /**
   * saved parameter of merged templates during compilation
   *
   * @var array
   */
  public $merged_templates_func = array();
  /**#@-*/
  /**
   * initialize new smarty object
   */
  public function __construct()
  {
    // selfpointer needed by some other class methods
    $this->smarty = $this;
    if (is_callable('mb_internal_encoding')) {
      mb_internal_encoding(smarty::$_charset);
    }
    $this->start_time = microtime(true);
    // set default dirs
    $this->settemplatedir('.' . ds . 'templates' . ds)
      ->setcompiledir('.' . ds . 'templates_c' . ds)
      ->setpluginsdir(smarty_plugins_dir)
      ->setcachedir('.' . ds . 'cache' . ds)
      ->setconfigdir('.' . ds . 'configs' . ds);
    $this->debug_tpl = 'file:' . dirname(__file__) . '/debug.tpl';
    if (isset($_server['script_name'])) {
      $this->assignglobal('script_name', $_server['script_name']);
    }
  }
  /**
   * class destructor
   */
  public function __destruct()
  {
    // intentionally left blank
  }
  /**
   * <<magic>> set selfpointer on cloned object
   */
  public function __clone()
  {
    $this->smarty = $this;
  }
  /**
   * <<magic>> generic getter.
   * calls the appropriate getter function.
   * issues an e_user_notice if no valid getter is found.
   *
   * @param string $name property name
   *
   * @return mixed
   */
  public function __get($name)
  {
    $allowed = array(
      'template_dir' => 'gettemplatedir',
      'config_dir'  => 'getconfigdir',
      'plugins_dir' => 'getpluginsdir',
      'compile_dir' => 'getcompiledir',
      'cache_dir'  => 'getcachedir',
    );
    if (isset($allowed[$name])) {
      return $this->{$allowed[$name]}();
    } else {
      trigger_error('undefined property: ' . get_class($this) . '::$' . $name, e_user_notice);
    }
  }
  /**
   * <<magic>> generic setter.
   * calls the appropriate setter function.
   * issues an e_user_notice if no valid setter is found.
   *
   * @param string $name property name
   * @param mixed $value parameter passed to setter
   */
  public function __set($name, $value)
  {
    $allowed = array(
      'template_dir' => 'settemplatedir',
      'config_dir'  => 'setconfigdir',
      'plugins_dir' => 'setpluginsdir',
      'compile_dir' => 'setcompiledir',
      'cache_dir'  => 'setcachedir',
    );
    if (isset($allowed[$name])) {
      $this->{$allowed[$name]}($value);
    } else {
      trigger_error('undefined property: ' . get_class($this) . '::$' . $name, e_user_notice);
    }
  }
  /**
   * check if a template resource exists
   *
   * @param string $resource_name template name
   *
   * @return boolean status
   */
  public function templateexists($resource_name)
  {
    // create template object
    $save = $this->template_objects;
    $tpl = new $this->template_class($resource_name, $this);
    // check if it does exists
    $result = $tpl->source->exists;
    $this->template_objects = $save;
    return $result;
  }
  /**
   * returns a single or all global variables
   *
   * @param string $varname variable name or null
   *
   * @return string variable value or or array of variables
   */
  public function getglobal($varname = null)
  {
    if (isset($varname)) {
      if (isset(self::$global_tpl_vars[$varname])) {
        return self::$global_tpl_vars[$varname]->value;
      } else {
        return '';
      }
    } else {
      $_result = array();
      foreach (self::$global_tpl_vars as $key => $var) {
        $_result[$key] = $var->value;
      }
      return $_result;
    }
  }
  /**
   * empty cache folder
   *
   * @param integer $exp_time expiration time
   * @param string $type   resource type
   *
   * @return integer number of cache files deleted
   */
  public function clearallcache($exp_time = null, $type = null)
  {
    // load cache resource and call clearall
    $_cache_resource = smarty_cacheresource::load($this, $type);
    smarty_cacheresource::invalidloadedcache($this);
    return $_cache_resource->clearall($this, $exp_time);
  }
  /**
   * empty cache for a specific template
   *
   * @param string $template_name template name
   * @param string $cache_id   cache id
   * @param string $compile_id  compile id
   * @param integer $exp_time   expiration time
   * @param string $type     resource type
   *
   * @return integer number of cache files deleted
   */
  public function clearcache($template_name, $cache_id = null, $compile_id = null, $exp_time = null, $type = null)
  {
    // load cache resource and call clear
    $_cache_resource = smarty_cacheresource::load($this, $type);
    smarty_cacheresource::invalidloadedcache($this);
    return $_cache_resource->clear($this, $template_name, $cache_id, $compile_id, $exp_time);
  }
  /**
   * loads security class and enables security
   *
   * @param string|smarty_security $security_class if a string is used, it must be class-name
   *
   * @return smarty         current smarty instance for chaining
   * @throws smartyexception    when an invalid class name is provided
   */
  public function enablesecurity($security_class = null)
  {
    if ($security_class instanceof smarty_security) {
      $this->security_policy = $security_class;
      return $this;
    } elseif (is_object($security_class)) {
      throw new smartyexception("class '" . get_class($security_class) . "' must extend smarty_security.");
    }
    if ($security_class == null) {
      $security_class = $this->security_class;
    }
    if (!class_exists($security_class)) {
      throw new smartyexception("security class '$security_class' is not defined");
    } elseif ($security_class !== 'smarty_security' && !is_subclass_of($security_class, 'smarty_security')) {
      throw new smartyexception("class '$security_class' must extend smarty_security.");
    } else {
      $this->security_policy = new $security_class($this);
    }
    return $this;
  }
  /**
   * disable security
   *
   * @return smarty current smarty instance for chaining
   */
  public function disablesecurity()
  {
    $this->security_policy = null;
    return $this;
  }
  /**
   * set template directory
   *
   * @param string|array $template_dir directory(s) of template sources
   *
   * @return smarty    current smarty instance for chaining
   */
  public function settemplatedir($template_dir)
  {
    $this->template_dir = array();
    foreach ((array) $template_dir as $k => $v) {
      $this->template_dir[$k] = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($v, '/\\')) . ds;
    }
    $this->joined_template_dir = join(directory_separator, $this->template_dir);
    return $this;
  }
  /**
   * add template directory(s)
   *
   * @param string|array $template_dir directory(s) of template sources
   * @param string    $key     of the array element to assign the template dir to
   *
   * @return smarty     current smarty instance for chaining
   * @throws smartyexception when the given template directory is not valid
   */
  public function addtemplatedir($template_dir, $key = null)
  {
    // make sure we're dealing with an array
    $this->template_dir = (array) $this->template_dir;
    if (is_array($template_dir)) {
      foreach ($template_dir as $k => $v) {
        $v = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($v, '/\\')) . ds;
        if (is_int($k)) {
          // indexes are not merged but appended
          $this->template_dir[] = $v;
        } else {
          // string indexes are overridden
          $this->template_dir[$k] = $v;
        }
      }
    } else {
      $v = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($template_dir, '/\\')) . ds;
      if ($key !== null) {
        // override directory at specified index
        $this->template_dir[$key] = $v;
      } else {
        // append new directory
        $this->template_dir[] = $v;
      }
    }
    $this->joined_template_dir = join(directory_separator, $this->template_dir);
    return $this;
  }
  /**
   * get template directories
   *
   * @param mixed $index index of directory to get, null to get all
   *
   * @return array|string list of template directories, or directory of $index
   */
  public function gettemplatedir($index = null)
  {
    if ($index !== null) {
      return isset($this->template_dir[$index]) ? $this->template_dir[$index] : null;
    }
    return (array) $this->template_dir;
  }
  /**
   * set config directory
   *
   * @param $config_dir
   *
   * @return smarty    current smarty instance for chaining
   */
  public function setconfigdir($config_dir)
  {
    $this->config_dir = array();
    foreach ((array) $config_dir as $k => $v) {
      $this->config_dir[$k] = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($v, '/\\')) . ds;
    }
    $this->joined_config_dir = join(directory_separator, $this->config_dir);
    return $this;
  }
  /**
   * add config directory(s)
   *
   * @param string|array    $config_dir directory(s) of config sources
   * @param mixed $key    key of the array element to assign the config dir to
   *
   * @return smarty current smarty instance for chaining
   */
  public function addconfigdir($config_dir, $key = null)
  {
    // make sure we're dealing with an array
    $this->config_dir = (array) $this->config_dir;
    if (is_array($config_dir)) {
      foreach ($config_dir as $k => $v) {
        $v = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($v, '/\\')) . ds;
        if (is_int($k)) {
          // indexes are not merged but appended
          $this->config_dir[] = $v;
        } else {
          // string indexes are overridden
          $this->config_dir[$k] = $v;
        }
      }
    } else {
      $v = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($config_dir, '/\\')) . ds;
      if ($key !== null) {
        // override directory at specified index
        $this->config_dir[$key] = rtrim($v, '/\\') . ds;
      } else {
        // append new directory
        $this->config_dir[] = rtrim($v, '/\\') . ds;
      }
    }
    $this->joined_config_dir = join(directory_separator, $this->config_dir);
    return $this;
  }
  /**
   * get config directory
   *
   * @param mixed $index index of directory to get, null to get all
   *
   * @return array|string configuration directory
   */
  public function getconfigdir($index = null)
  {
    if ($index !== null) {
      return isset($this->config_dir[$index]) ? $this->config_dir[$index] : null;
    }
    return (array) $this->config_dir;
  }
  /**
   * set plugins directory
   *
   * @param string|array $plugins_dir directory(s) of plugins
   *
   * @return smarty    current smarty instance for chaining
   */
  public function setpluginsdir($plugins_dir)
  {
    $this->plugins_dir = array();
    foreach ((array) $plugins_dir as $k => $v) {
      $this->plugins_dir[$k] = rtrim($v, '/\\') . ds;
    }
    return $this;
  }
  /**
   * adds directory of plugin files
   *
   * @param $plugins_dir
   *
   * @return smarty current smarty instance for chaining
   */
  public function addpluginsdir($plugins_dir)
  {
    // make sure we're dealing with an array
    $this->plugins_dir = (array) $this->plugins_dir;
    if (is_array($plugins_dir)) {
      foreach ($plugins_dir as $k => $v) {
        if (is_int($k)) {
          // indexes are not merged but appended
          $this->plugins_dir[] = rtrim($v, '/\\') . ds;
        } else {
          // string indexes are overridden
          $this->plugins_dir[$k] = rtrim($v, '/\\') . ds;
        }
      }
    } else {
      // append new directory
      $this->plugins_dir[] = rtrim($plugins_dir, '/\\') . ds;
    }
    $this->plugins_dir = array_unique($this->plugins_dir);
    return $this;
  }
  /**
   * get plugin directories
   *
   * @return array list of plugin directories
   */
  public function getpluginsdir()
  {
    return (array) $this->plugins_dir;
  }
  /**
   * set compile directory
   *
   * @param string $compile_dir directory to store compiled templates in
   *
   * @return smarty current smarty instance for chaining
   */
  public function setcompiledir($compile_dir)
  {
    $this->compile_dir = rtrim($compile_dir, '/\\') . ds;
    if (!isset(smarty::$_muted_directories[$this->compile_dir])) {
      smarty::$_muted_directories[$this->compile_dir] = null;
    }
    return $this;
  }
  /**
   * get compiled directory
   *
   * @return string path to compiled templates
   */
  public function getcompiledir()
  {
    return $this->compile_dir;
  }
  /**
   * set cache directory
   *
   * @param string $cache_dir directory to store cached templates in
   *
   * @return smarty current smarty instance for chaining
   */
  public function setcachedir($cache_dir)
  {
    $this->cache_dir = rtrim($cache_dir, '/\\') . ds;
    if (!isset(smarty::$_muted_directories[$this->cache_dir])) {
      smarty::$_muted_directories[$this->cache_dir] = null;
    }
    return $this;
  }
  /**
   * get cache directory
   *
   * @return string path of cache directory
   */
  public function getcachedir()
  {
    return $this->cache_dir;
  }
  /**
   * set default modifiers
   *
   * @param array|string $modifiers modifier or list of modifiers to set
   *
   * @return smarty    current smarty instance for chaining
   */
  public function setdefaultmodifiers($modifiers)
  {
    $this->default_modifiers = (array) $modifiers;
    return $this;
  }
  /**
   * add default modifiers
   *
   * @param array|string $modifiers modifier or list of modifiers to add
   *
   * @return smarty    current smarty instance for chaining
   */
  public function adddefaultmodifiers($modifiers)
  {
    if (is_array($modifiers)) {
      $this->default_modifiers = array_merge($this->default_modifiers, $modifiers);
    } else {
      $this->default_modifiers[] = $modifiers;
    }
    return $this;
  }
  /**
   * get default modifiers
   *
   * @return array list of default modifiers
   */
  public function getdefaultmodifiers()
  {
    return $this->default_modifiers;
  }
  /**
   * set autoload filters
   *
   * @param array $filters filters to load automatically
   * @param string $type  "pre", "output", … specify the filter type to set. defaults to none treating $filters' keys as the appropriate types
   *
   * @return smarty current smarty instance for chaining
   */
  public function setautoloadfilters($filters, $type = null)
  {
    if ($type !== null) {
      $this->autoload_filters[$type] = (array) $filters;
    } else {
      $this->autoload_filters = (array) $filters;
    }
    return $this;
  }
  /**
   * add autoload filters
   *
   * @param array $filters filters to load automatically
   * @param string $type  "pre", "output", … specify the filter type to set. defaults to none treating $filters' keys as the appropriate types
   *
   * @return smarty current smarty instance for chaining
   */
  public function addautoloadfilters($filters, $type = null)
  {
    if ($type !== null) {
      if (!empty($this->autoload_filters[$type])) {
        $this->autoload_filters[$type] = array_merge($this->autoload_filters[$type], (array) $filters);
      } else {
        $this->autoload_filters[$type] = (array) $filters;
      }
    } else {
      foreach ((array) $filters as $key => $value) {
        if (!empty($this->autoload_filters[$key])) {
          $this->autoload_filters[$key] = array_merge($this->autoload_filters[$key], (array) $value);
        } else {
          $this->autoload_filters[$key] = (array) $value;
        }
      }
    }
    return $this;
  }
  /**
   * get autoload filters
   *
   * @param string $type type of filter to get autoloads for. defaults to all autoload filters
   *
   * @return array array( 'type1' => array( 'filter1', 'filter2', … ) ) or array( 'filter1', 'filter2', …) if $type was specified
   */
  public function getautoloadfilters($type = null)
  {
    if ($type !== null) {
      return isset($this->autoload_filters[$type]) ? $this->autoload_filters[$type] : array();
    }
    return $this->autoload_filters;
  }
  /**
   * return name of debugging template
   *
   * @return string
   */
  public function getdebugtemplate()
  {
    return $this->debug_tpl;
  }
  /**
   * set the debug template
   *
   * @param string $tpl_name
   *
   * @return smarty     current smarty instance for chaining
   * @throws smartyexception if file is not readable
   */
  public function setdebugtemplate($tpl_name)
  {
    if (!is_readable($tpl_name)) {
      throw new smartyexception("unknown file '{$tpl_name}'");
    }
    $this->debug_tpl = $tpl_name;
    return $this;
  }
  /**
   * creates a template object
   *
   * @param string $template  the resource handle of the template file
   * @param mixed  $cache_id  cache id to be used with this template
   * @param mixed  $compile_id compile id to be used with this template
   * @param object $parent   next higher level of smarty variables
   * @param boolean $do_clone  flag is smarty object shall be cloned
   *
   * @return object template object
   */
  public function createtemplate($template, $cache_id = null, $compile_id = null, $parent = null, $do_clone = true)
  {
    if ($cache_id !== null && (is_object($cache_id) || is_array($cache_id))) {
      $parent = $cache_id;
      $cache_id = null;
    }
    if ($parent !== null && is_array($parent)) {
      $data = $parent;
      $parent = null;
    } else {
      $data = null;
    }
    // default to cache_id and compile_id of smarty object
    $cache_id = $cache_id === null ? $this->cache_id : $cache_id;
    $compile_id = $compile_id === null ? $this->compile_id : $compile_id;
    // already in template cache?
    if ($this->allow_ambiguous_resources) {
      $_templateid = smarty_resource::getuniquetemplatename($this, $template) . $cache_id . $compile_id;
    } else {
      $_templateid = $this->joined_template_dir . '#' . $template . $cache_id . $compile_id;
    }
    if (isset($_templateid[150])) {
      $_templateid = sha1($_templateid);
    }
    if ($do_clone) {
      if (isset($this->template_objects[$_templateid])) {
        // return cached template object
        $tpl = clone $this->template_objects[$_templateid];
        $tpl->smarty = clone $tpl->smarty;
        $tpl->parent = $parent;
        $tpl->tpl_vars = array();
        $tpl->config_vars = array();
      } else {
        $tpl = new $this->template_class($template, clone $this, $parent, $cache_id, $compile_id);
      }
    } else {
      if (isset($this->template_objects[$_templateid])) {
        // return cached template object
        $tpl = $this->template_objects[$_templateid];
        $tpl->parent = $parent;
        $tpl->tpl_vars = array();
        $tpl->config_vars = array();
      } else {
        $tpl = new $this->template_class($template, $this, $parent, $cache_id, $compile_id);
      }
    }
    // fill data if present
    if (!empty($data) && is_array($data)) {
      // set up variable values
      foreach ($data as $_key => $_val) {
        $tpl->tpl_vars[$_key] = new smarty_variable($_val);
      }
    }
    return $tpl;
  }
  /**
   * takes unknown classes and loads plugin files for them
   * class name format: smarty_plugintype_pluginname
   * plugin filename format: plugintype.pluginname.php
   *
   * @param string $plugin_name class plugin name to load
   * @param bool  $check    check if already loaded
   *
   * @throws smartyexception
   * @return string |boolean filepath of loaded file or false
   */
  public function loadplugin($plugin_name, $check = true)
  {
    // if function or class exists, exit silently (already loaded)
    if ($check && (is_callable($plugin_name) || class_exists($plugin_name, false))) {
      return true;
    }
    // plugin name is expected to be: smarty_[type]_[name]
    $_name_parts = explode('_', $plugin_name, 3);
    // class name must have three parts to be valid plugin
    // count($_name_parts) < 3 === !isset($_name_parts[2])
    if (!isset($_name_parts[2]) || strtolower($_name_parts[0]) !== 'smarty') {
      throw new smartyexception("plugin {$plugin_name} is not a valid name format");
    }
    // if type is "internal", get plugin from sysplugins
    if (strtolower($_name_parts[1]) == 'internal') {
      $file = smarty_sysplugins_dir . strtolower($plugin_name) . '.php';
      if (file_exists($file)) {
        require_once($file);
        return $file;
      } else {
        return false;
      }
    }
    // plugin filename is expected to be: [type].[name].php
    $_plugin_filename = "{$_name_parts[1]}.{$_name_parts[2]}.php";
    $_stream_resolve_include_path = function_exists('stream_resolve_include_path');
    // loop through plugin dirs and find the plugin
    foreach ($this->getpluginsdir() as $_plugin_dir) {
      $names = array(
        $_plugin_dir . $_plugin_filename,
        $_plugin_dir . strtolower($_plugin_filename),
      );
      foreach ($names as $file) {
        if (file_exists($file)) {
          require_once($file);
          return $file;
        }
        if ($this->use_include_path && !preg_match('/^([\/\\\\]|[a-za-z]:[\/\\\\])/', $_plugin_dir)) {
          // try php include_path
          if ($_stream_resolve_include_path) {
            $file = stream_resolve_include_path($file);
          } else {
            $file = smarty_internal_get_include_path::getincludepath($file);
          }
          if ($file !== false) {
            require_once($file);
            return $file;
          }
        }
      }
    }
    // no plugin loaded
    return false;
  }
  /**
   * compile all template files
   *
   * @param string $extension   file extension
   * @param bool  $force_compile force all to recompile
   * @param int  $time_limit
   * @param int  $max_errors
   *
   * @return integer number of template files recompiled
   */
  public function compilealltemplates($extension = '.tpl', $force_compile = false, $time_limit = 0, $max_errors = null)
  {
    return smarty_internal_utility::compilealltemplates($extension, $force_compile, $time_limit, $max_errors, $this);
  }
  /**
   * compile all config files
   *
   * @param string $extension   file extension
   * @param bool  $force_compile force all to recompile
   * @param int  $time_limit
   * @param int  $max_errors
   *
   * @return integer number of template files recompiled
   */
  public function compileallconfig($extension = '.conf', $force_compile = false, $time_limit = 0, $max_errors = null)
  {
    return smarty_internal_utility::compileallconfig($extension, $force_compile, $time_limit, $max_errors, $this);
  }
  /**
   * delete compiled template file
   *
   * @param string $resource_name template name
   * @param string $compile_id  compile id
   * @param integer $exp_time   expiration time
   *
   * @return integer number of template files deleted
   */
  public function clearcompiledtemplate($resource_name = null, $compile_id = null, $exp_time = null)
  {
    return smarty_internal_utility::clearcompiledtemplate($resource_name, $compile_id, $exp_time, $this);
  }
  /**
   * return array of tag/attributes of all tags used by an template
   *
   * @param smarty_internal_template $template
   *
   * @return array of tag/attributes
   */
  public function gettags(smarty_internal_template $template)
  {
    return smarty_internal_utility::gettags($template);
  }
  /**
   * run installation test
   *
   * @param array $errors array to write errors into, rather than outputting them
   *
   * @return boolean true if setup is fine, false if something is wrong
   */
  public function testinstall(&$errors = null)
  {
    return smarty_internal_utility::testinstall($this, $errors);
  }
  /**
   * error handler to mute expected messages
   *
   * @link http://php.net/set_error_handler
   *
   * @param integer $errno error level
   * @param     $errstr
   * @param     $errfile
   * @param     $errline
   * @param     $errcontext
   *
   * @return boolean
   */
  public static function mutingerrorhandler($errno, $errstr, $errfile, $errline, $errcontext)
  {
    $_is_muted_directory = false;
    // add the smarty_dir to the list of muted directories
    if (!isset(smarty::$_muted_directories[smarty_dir])) {
      $smarty_dir = realpath(smarty_dir);
      if ($smarty_dir !== false) {
        smarty::$_muted_directories[smarty_dir] = array(
          'file'  => $smarty_dir,
          'length' => strlen($smarty_dir),
        );
      }
    }
    // walk the muted directories and test against $errfile
    foreach (smarty::$_muted_directories as $key => &$dir) {
      if (!$dir) {
        // resolve directory and length for speedy comparisons
        $file = realpath($key);
        if ($file === false) {
          // this directory does not exist, remove and skip it
          unset(smarty::$_muted_directories[$key]);
          continue;
        }
        $dir = array(
          'file'  => $file,
          'length' => strlen($file),
        );
      }
      if (!strncmp($errfile, $dir['file'], $dir['length'])) {
        $_is_muted_directory = true;
        break;
      }
    }
    // pass to next error handler if this error did not occur inside smarty_dir
    // or the error was within smarty but masked to be ignored
    if (!$_is_muted_directory || ($errno && $errno & error_reporting())) {
      if (smarty::$_previous_error_handler) {
        return call_user_func(smarty::$_previous_error_handler, $errno, $errstr, $errfile, $errline, $errcontext);
      } else {
        return false;
      }
    }
  }
  /**
   * enable error handler to mute expected messages
   *
   * @return void
   */
  public static function muteexpectederrors()
  {
    /*
      error muting is done because some people implemented custom error_handlers using
      http://php.net/set_error_handler and for some reason did not understand the following paragraph:
        it is important to remember that the standard php error handler is completely bypassed for the
        error types specified by error_types unless the callback function returns false.
        error_reporting() settings will have no effect and your error handler will be called regardless -
        however you are still able to read the current value of error_reporting and act appropriately.
        of particular note is that this value will be 0 if the statement that caused the error was
        prepended by the @ error-control operator.
      smarty deliberately uses @filemtime() over file_exists() and filemtime() in some places. reasons include
        - @filemtime() is almost twice as fast as using an additional file_exists()
        - between file_exists() and filemtime() a possible race condition is opened,
         which does not exist using the simple @filemtime() approach.
    */
    $error_handler = array('smarty', 'mutingerrorhandler');
    $previous = set_error_handler($error_handler);
    // avoid dead loops
    if ($previous !== $error_handler) {
      smarty::$_previous_error_handler = $previous;
    }
  }
  /**
   * disable error handler muting expected messages
   *
   * @return void
   */
  public static function unmuteexpectederrors()
  {
    restore_error_handler();
  }
}
// check if we're running on windows
smarty::$_is_windows = strtoupper(substr(php_os, 0, 3)) === 'win';
// let pcre (preg_*) treat strings as iso-8859-1 if we're not dealing with utf-8
if (smarty::$_charset !== 'utf-8') {
  smarty::$_utf8_modifier = '';
}
/**
 * smarty exception class
 *
 * @package smarty
 */
class smartyexception extends exception
{
  public static $escape = false;
  public function __tostring()
  {
    return ' --> smarty: ' . (self::$escape ? htmlentities($this->message) : $this->message) . ' <-- ';
  }
}
/**
 * smarty compiler exception class
 *
 * @package smarty
 */
class smartycompilerexception extends smartyexception
{
  public function __tostring()
  {
    return ' --> smarty compiler: ' . $this->message . ' <-- ';
  }
  /**
   * the line number of the template error
   *
   * @type int|null
   */
  public $line = null;
  /**
   * the template source snippet relating to the error
   *
   * @type string|null
   */
  public $source = null;
  /**
   * the raw text of the error message
   *
   * @type string|null
   */
  public $desc = null;
  /**
   * the resource identifier or template name
   *
   * @type string|null
   */
  public $template = null;
}
/**
 * autoloader
 */
function smartyautoload($class)
{
  $_class = strtolower($class);
  static $_classes = array(
    'smarty_config_source'        => true,
    'smarty_config_compiled'       => true,
    'smarty_security'          => true,
    'smarty_cacheresource'        => true,
    'smarty_cacheresource_custom'    => true,
    'smarty_cacheresource_keyvaluestore' => true,
    'smarty_resource'          => true,
    'smarty_resource_custom'       => true,
    'smarty_resource_uncompiled'     => true,
    'smarty_resource_recompiled'     => true,
  );
  if (!strncmp($_class, 'smarty_internal_', 16) || isset($_classes[$_class])) {
    include smarty_sysplugins_dir . $_class . '.php';
  }
}
<?php
/**
 * project:   smarty: the php compiling template engine
 * file:    smarty.class.php
 * svn:     $id: smarty.class.php 4848 2014-06-08 18:12:09z uwe.tews@googlemail.com $
 * this library is free software; you can redistribute it and/or
 * modify it under the terms of the gnu lesser general public
 * license as published by the free software foundation; either
 * version 2.1 of the license, or (at your option) any later version.
 * this library is distributed in the hope that it will be useful,
 * but without any warranty; without even the implied warranty of
 * merchantability or fitness for a particular purpose. see the gnu
 * lesser general public license for more details.
 * you should have received a copy of the gnu lesser general public
 * license along with this library; if not, write to the free software
 * foundation, inc., 59 temple place, suite 330, boston, ma 02111-1307 usa
 * for questions, help, comments, discussion, etc., please join the
 * smarty mailing list. send a blank e-mail to
 * smarty-discussion-subscribe@googlegroups.com
 *
 * @link   http://www.smarty.net/
 * @copyright 2008 new digital group, inc.
 * @author  monte ohrt <monte at ohrt dot com>
 * @author  uwe tews
 * @author  rodney rehm
 * @package  smarty
 * @version  3.1.19
 */
/**
 * define shorthand directory separator constant
 */
if (!defined('ds')) {
  define('ds', directory_separator);
}
/**
 * set smarty_dir to absolute path to smarty library files.
 * sets smarty_dir only if user application has not already defined it.
 */
if (!defined('smarty_dir')) {
  define('smarty_dir', dirname(__file__) . ds);
}
/**
 * set smarty_sysplugins_dir to absolute path to smarty internal plugins.
 * sets smarty_sysplugins_dir only if user application has not already defined it.
 */
if (!defined('smarty_sysplugins_dir')) {
  define('smarty_sysplugins_dir', smarty_dir . 'sysplugins' . ds);
}
if (!defined('smarty_plugins_dir')) {
  define('smarty_plugins_dir', smarty_dir . 'plugins' . ds);
}
if (!defined('smarty_mbstring')) {
  define('smarty_mbstring', function_exists('mb_split'));
}
if (!defined('smarty_resource_char_set')) {
  // utf-8 can only be done properly when mbstring is available!
  /**
   * @deprecated in favor of smarty::$_charset
   */
  define('smarty_resource_char_set', smarty_mbstring ? 'utf-8' : 'iso-8859-1');
}
if (!defined('smarty_resource_date_format')) {
  /**
   * @deprecated in favor of smarty::$_date_format
   */
  define('smarty_resource_date_format', '%b %e, %y');
}
/**
 * register the class autoloader
 */
if (!defined('smarty_spl_autoload')) {
  define('smarty_spl_autoload', 0);
}
if (smarty_spl_autoload && set_include_path(get_include_path() . path_separator . smarty_sysplugins_dir) !== false) {
  $registeredautoloadfunctions = spl_autoload_functions();
  if (!isset($registeredautoloadfunctions['spl_autoload'])) {
    spl_autoload_register();
  }
} else {
  spl_autoload_register('smartyautoload');
}
/**
 * load always needed external class files
 */
include_once smarty_sysplugins_dir . 'smarty_internal_data.php';
include_once smarty_sysplugins_dir . 'smarty_internal_templatebase.php';
include_once smarty_sysplugins_dir . 'smarty_internal_template.php';
include_once smarty_sysplugins_dir . 'smarty_resource.php';
include_once smarty_sysplugins_dir . 'smarty_internal_resource_file.php';
include_once smarty_sysplugins_dir . 'smarty_cacheresource.php';
include_once smarty_sysplugins_dir . 'smarty_internal_cacheresource_file.php';
/**
 * this is the main smarty class
 *
 * @package smarty
 */
class smarty extends smarty_internal_templatebase
{
  /**#@+
   * constant definitions
   */
  /**
   * smarty version
   */
  const smarty_version = 'smarty-3.1.19';
  /**
   * define variable scopes
   */
  const scope_local = 0;
  const scope_parent = 1;
  const scope_root = 2;
  const scope_global = 3;
  /**
   * define caching modes
   */
  const caching_off = 0;
  const caching_lifetime_current = 1;
  const caching_lifetime_saved = 2;
  /**
   * define constant for clearing cache files be saved expiration datees
   */
  const clear_expired = - 1;
  /**
   * define compile check modes
   */
  const compilecheck_off = 0;
  const compilecheck_on = 1;
  const compilecheck_cachemiss = 2;
  /**
   * modes for handling of "<?php ... ?>" tags in templates.
   */
  const php_passthru = 0; //-> print tags as plain text
  const php_quote = 1; //-> escape tags as entities
  const php_remove = 2; //-> escape tags as entities
  const php_allow = 3; //-> escape tags as entities
  /**
   * filter types
   */
  const filter_post = 'post';
  const filter_pre = 'pre';
  const filter_output = 'output';
  const filter_variable = 'variable';
  /**
   * plugin types
   */
  const plugin_function = 'function';
  const plugin_block = 'block';
  const plugin_compiler = 'compiler';
  const plugin_modifier = 'modifier';
  const plugin_modifiercompiler = 'modifiercompiler';
  /**#@-*/
  /**
   * assigned global tpl vars
   */
  public static $global_tpl_vars = array();
  /**
   * error handler returned by set_error_hanlder() in smarty::muteexpectederrors()
   */
  public static $_previous_error_handler = null;
  /**
   * contains directories outside of smarty_dir that are to be muted by muteexpectederrors()
   */
  public static $_muted_directories = array();
  /**
   * flag denoting if multibyte string functions are available
   */
  public static $_mbstring = smarty_mbstring;
  /**
   * the character set to adhere to (e.g. "utf-8")
   */
  public static $_charset = smarty_resource_char_set;
  /**
   * the date format to be used internally
   * (accepts date() and strftime())
   */
  public static $_date_format = smarty_resource_date_format;
  /**
   * flag denoting if pcre should run in utf-8 mode
   */
  public static $_utf8_modifier = 'u';
  /**
   * flag denoting if operating system is windows
   */
  public static $_is_windows = false;
  /**#@+
   * variables
   */
  /**
   * auto literal on delimiters with whitspace
   *
   * @var boolean
   */
  public $auto_literal = true;
  /**
   * display error on not assigned variables
   *
   * @var boolean
   */
  public $error_unassigned = false;
  /**
   * look up relative filepaths in include_path
   *
   * @var boolean
   */
  public $use_include_path = false;
  /**
   * template directory
   *
   * @var array
   */
  private $template_dir = array();
  /**
   * joined template directory string used in cache keys
   *
   * @var string
   */
  public $joined_template_dir = null;
  /**
   * joined config directory string used in cache keys
   *
   * @var string
   */
  public $joined_config_dir = null;
  /**
   * default template handler
   *
   * @var callable
   */
  public $default_template_handler_func = null;
  /**
   * default config handler
   *
   * @var callable
   */
  public $default_config_handler_func = null;
  /**
   * default plugin handler
   *
   * @var callable
   */
  public $default_plugin_handler_func = null;
  /**
   * compile directory
   *
   * @var string
   */
  private $compile_dir = null;
  /**
   * plugins directory
   *
   * @var array
   */
  private $plugins_dir = array();
  /**
   * cache directory
   *
   * @var string
   */
  private $cache_dir = null;
  /**
   * config directory
   *
   * @var array
   */
  private $config_dir = array();
  /**
   * force template compiling?
   *
   * @var boolean
   */
  public $force_compile = false;
  /**
   * check template for modifications?
   *
   * @var boolean
   */
  public $compile_check = true;
  /**
   * use sub dirs for compiled/cached files?
   *
   * @var boolean
   */
  public $use_sub_dirs = false;
  /**
   * allow ambiguous resources (that are made unique by the resource handler)
   *
   * @var boolean
   */
  public $allow_ambiguous_resources = false;
  /**
   * caching enabled
   *
   * @var boolean
   */
  public $caching = false;
  /**
   * merge compiled includes
   *
   * @var boolean
   */
  public $merge_compiled_includes = false;
  /**
   * template inheritance merge compiled includes
   *
   * @var boolean
   */
  public $inheritance_merge_compiled_includes = true;
  /**
   * cache lifetime in seconds
   *
   * @var integer
   */
  public $cache_lifetime = 3600;
  /**
   * force cache file creation
   *
   * @var boolean
   */
  public $force_cache = false;
  /**
   * set this if you want different sets of cache files for the same
   * templates.
   *
   * @var string
   */
  public $cache_id = null;
  /**
   * set this if you want different sets of compiled files for the same
   * templates.
   *
   * @var string
   */
  public $compile_id = null;
  /**
   * template left-delimiter
   *
   * @var string
   */
  public $left_delimiter = "{";
  /**
   * template right-delimiter
   *
   * @var string
   */
  public $right_delimiter = "}";
  /**#@+
   * security
   */
  /**
   * class name
   * this should be instance of smarty_security.
   *
   * @var string
   * @see smarty_security
   */
  public $security_class = 'smarty_security';
  /**
   * implementation of security class
   *
   * @var smarty_security
   */
  public $security_policy = null;
  /**
   * controls handling of php-blocks
   *
   * @var integer
   */
  public $php_handling = self::php_passthru;
  /**
   * controls if the php template file resource is allowed
   *
   * @var bool
   */
  public $allow_php_templates = false;
  /**
   * should compiled-templates be prevented from being called directly?
   * {@internal
   * currently used by smarty_internal_template only.
   * }}
   *
   * @var boolean
   */
  public $direct_access_security = true;
  /**#@-*/
  /**
   * debug mode
   * setting this to true enables the debug-console.
   *
   * @var boolean
   */
  public $debugging = false;
  /**
   * this determines if debugging is enable-able from the browser.
   * <ul>
   * <li>none => no debugging control allowed</li>
   * <li>url => enable debugging when smarty_debug is found in the url.</li>
   * </ul>
   *
   * @var string
   */
  public $debugging_ctrl = 'none';
  /**
   * name of debugging url-param.
   * only used when $debugging_ctrl is set to 'url'.
   * the name of the url-parameter that activates debugging.
   *
   * @var type
   */
  public $smarty_debug_id = 'smarty_debug';
  /**
   * path of debug template.
   *
   * @var string
   */
  public $debug_tpl = null;
  /**
   * when set, smarty uses this value as error_reporting-level.
   *
   * @var int
   */
  public $error_reporting = null;
  /**
   * internal flag for gettags()
   *
   * @var boolean
   */
  public $get_used_tags = false;
  /**#@+
   * config var settings
   */
  /**
   * controls whether variables with the same name overwrite each other.
   *
   * @var boolean
   */
  public $config_overwrite = true;
  /**
   * controls whether config values of on/true/yes and off/false/no get converted to boolean.
   *
   * @var boolean
   */
  public $config_booleanize = true;
  /**
   * controls whether hidden config sections/vars are read from the file.
   *
   * @var boolean
   */
  public $config_read_hidden = false;
  /**#@-*/
  /**#@+
   * resource locking
   */
  /**
   * locking concurrent compiles
   *
   * @var boolean
   */
  public $compile_locking = true;
  /**
   * controls whether cache resources should emply locking mechanism
   *
   * @var boolean
   */
  public $cache_locking = false;
  /**
   * seconds to wait for acquiring a lock before ignoring the write lock
   *
   * @var float
   */
  public $locking_timeout = 10;
  /**#@-*/
  /**
   * global template functions
   *
   * @var array
   */
  public $template_functions = array();
  /**
   * resource type used if none given
   * must be an valid key of $registered_resources.
   *
   * @var string
   */
  public $default_resource_type = 'file';
  /**
   * caching type
   * must be an element of $cache_resource_types.
   *
   * @var string
   */
  public $caching_type = 'file';
  /**
   * internal config properties
   *
   * @var array
   */
  public $properties = array();
  /**
   * config type
   *
   * @var string
   */
  public $default_config_type = 'file';
  /**
   * cached template objects
   *
   * @var array
   */
  public $template_objects = array();
  /**
   * check if-modified-since headers
   *
   * @var boolean
   */
  public $cache_modified_check = false;
  /**
   * registered plugins
   *
   * @var array
   */
  public $registered_plugins = array();
  /**
   * plugin search order
   *
   * @var array
   */
  public $plugin_search_order = array('function', 'block', 'compiler', 'class');
  /**
   * registered objects
   *
   * @var array
   */
  public $registered_objects = array();
  /**
   * registered classes
   *
   * @var array
   */
  public $registered_classes = array();
  /**
   * registered filters
   *
   * @var array
   */
  public $registered_filters = array();
  /**
   * registered resources
   *
   * @var array
   */
  public $registered_resources = array();
  /**
   * resource handler cache
   *
   * @var array
   */
  public $_resource_handlers = array();
  /**
   * registered cache resources
   *
   * @var array
   */
  public $registered_cache_resources = array();
  /**
   * cache resource handler cache
   *
   * @var array
   */
  public $_cacheresource_handlers = array();
  /**
   * autoload filter
   *
   * @var array
   */
  public $autoload_filters = array();
  /**
   * default modifier
   *
   * @var array
   */
  public $default_modifiers = array();
  /**
   * autoescape variable output
   *
   * @var boolean
   */
  public $escape_html = false;
  /**
   * global internal smarty vars
   *
   * @var array
   */
  public static $_smarty_vars = array();
  /**
   * start time for execution time calculation
   *
   * @var int
   */
  public $start_time = 0;
  /**
   * default file permissions
   *
   * @var int
   */
  public $_file_perms = 0644;
  /**
   * default dir permissions
   *
   * @var int
   */
  public $_dir_perms = 0771;
  /**
   * block tag hierarchy
   *
   * @var array
   */
  public $_tag_stack = array();
  /**
   * self pointer to smarty object
   *
   * @var smarty
   */
  public $smarty;
  /**
   * required by the compiler for bc
   *
   * @var string
   */
  public $_current_file = null;
  /**
   * internal flag to enable parser debugging
   *
   * @var bool
   */
  public $_parserdebug = false;
  /**
   * saved parameter of merged templates during compilation
   *
   * @var array
   */
  public $merged_templates_func = array();
  /**#@-*/
  /**
   * initialize new smarty object
   */
  public function __construct()
  {
    // selfpointer needed by some other class methods
    $this->smarty = $this;
    if (is_callable('mb_internal_encoding')) {
      mb_internal_encoding(smarty::$_charset);
    }
    $this->start_time = microtime(true);
    // set default dirs
    $this->settemplatedir('.' . ds . 'templates' . ds)
      ->setcompiledir('.' . ds . 'templates_c' . ds)
      ->setpluginsdir(smarty_plugins_dir)
      ->setcachedir('.' . ds . 'cache' . ds)
      ->setconfigdir('.' . ds . 'configs' . ds);
    $this->debug_tpl = 'file:' . dirname(__file__) . '/debug.tpl';
    if (isset($_server['script_name'])) {
      $this->assignglobal('script_name', $_server['script_name']);
    }
  }
  /**
   * class destructor
   */
  public function __destruct()
  {
    // intentionally left blank
  }
  /**
   * <<magic>> set selfpointer on cloned object
   */
  public function __clone()
  {
    $this->smarty = $this;
  }
  /**
   * <<magic>> generic getter.
   * calls the appropriate getter function.
   * issues an e_user_notice if no valid getter is found.
   *
   * @param string $name property name
   *
   * @return mixed
   */
  public function __get($name)
  {
    $allowed = array(
      'template_dir' => 'gettemplatedir',
      'config_dir'  => 'getconfigdir',
      'plugins_dir' => 'getpluginsdir',
      'compile_dir' => 'getcompiledir',
      'cache_dir'  => 'getcachedir',
    );
    if (isset($allowed[$name])) {
      return $this->{$allowed[$name]}();
    } else {
      trigger_error('undefined property: ' . get_class($this) . '::$' . $name, e_user_notice);
    }
  }
  /**
   * <<magic>> generic setter.
   * calls the appropriate setter function.
   * issues an e_user_notice if no valid setter is found.
   *
   * @param string $name property name
   * @param mixed $value parameter passed to setter
   */
  public function __set($name, $value)
  {
    $allowed = array(
      'template_dir' => 'settemplatedir',
      'config_dir'  => 'setconfigdir',
      'plugins_dir' => 'setpluginsdir',
      'compile_dir' => 'setcompiledir',
      'cache_dir'  => 'setcachedir',
    );
    if (isset($allowed[$name])) {
      $this->{$allowed[$name]}($value);
    } else {
      trigger_error('undefined property: ' . get_class($this) . '::$' . $name, e_user_notice);
    }
  }
  /**
   * check if a template resource exists
   *
   * @param string $resource_name template name
   *
   * @return boolean status
   */
  public function templateexists($resource_name)
  {
    // create template object
    $save = $this->template_objects;
    $tpl = new $this->template_class($resource_name, $this);
    // check if it does exists
    $result = $tpl->source->exists;
    $this->template_objects = $save;
    return $result;
  }
  /**
   * returns a single or all global variables
   *
   * @param string $varname variable name or null
   *
   * @return string variable value or or array of variables
   */
  public function getglobal($varname = null)
  {
    if (isset($varname)) {
      if (isset(self::$global_tpl_vars[$varname])) {
        return self::$global_tpl_vars[$varname]->value;
      } else {
        return '';
      }
    } else {
      $_result = array();
      foreach (self::$global_tpl_vars as $key => $var) {
        $_result[$key] = $var->value;
      }
      return $_result;
    }
  }
  /**
   * empty cache folder
   *
   * @param integer $exp_time expiration time
   * @param string $type   resource type
   *
   * @return integer number of cache files deleted
   */
  public function clearallcache($exp_time = null, $type = null)
  {
    // load cache resource and call clearall
    $_cache_resource = smarty_cacheresource::load($this, $type);
    smarty_cacheresource::invalidloadedcache($this);
    return $_cache_resource->clearall($this, $exp_time);
  }
  /**
   * empty cache for a specific template
   *
   * @param string $template_name template name
   * @param string $cache_id   cache id
   * @param string $compile_id  compile id
   * @param integer $exp_time   expiration time
   * @param string $type     resource type
   *
   * @return integer number of cache files deleted
   */
  public function clearcache($template_name, $cache_id = null, $compile_id = null, $exp_time = null, $type = null)
  {
    // load cache resource and call clear
    $_cache_resource = smarty_cacheresource::load($this, $type);
    smarty_cacheresource::invalidloadedcache($this);
    return $_cache_resource->clear($this, $template_name, $cache_id, $compile_id, $exp_time);
  }
  /**
   * loads security class and enables security
   *
   * @param string|smarty_security $security_class if a string is used, it must be class-name
   *
   * @return smarty         current smarty instance for chaining
   * @throws smartyexception    when an invalid class name is provided
   */
  public function enablesecurity($security_class = null)
  {
    if ($security_class instanceof smarty_security) {
      $this->security_policy = $security_class;
      return $this;
    } elseif (is_object($security_class)) {
      throw new smartyexception("class '" . get_class($security_class) . "' must extend smarty_security.");
    }
    if ($security_class == null) {
      $security_class = $this->security_class;
    }
    if (!class_exists($security_class)) {
      throw new smartyexception("security class '$security_class' is not defined");
    } elseif ($security_class !== 'smarty_security' && !is_subclass_of($security_class, 'smarty_security')) {
      throw new smartyexception("class '$security_class' must extend smarty_security.");
    } else {
      $this->security_policy = new $security_class($this);
    }
    return $this;
  }
  /**
   * disable security
   *
   * @return smarty current smarty instance for chaining
   */
  public function disablesecurity()
  {
    $this->security_policy = null;
    return $this;
  }
  /**
   * set template directory
   *
   * @param string|array $template_dir directory(s) of template sources
   *
   * @return smarty    current smarty instance for chaining
   */
  public function settemplatedir($template_dir)
  {
    $this->template_dir = array();
    foreach ((array) $template_dir as $k => $v) {
      $this->template_dir[$k] = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($v, '/\\')) . ds;
    }
    $this->joined_template_dir = join(directory_separator, $this->template_dir);
    return $this;
  }
  /**
   * add template directory(s)
   *
   * @param string|array $template_dir directory(s) of template sources
   * @param string    $key     of the array element to assign the template dir to
   *
   * @return smarty     current smarty instance for chaining
   * @throws smartyexception when the given template directory is not valid
   */
  public function addtemplatedir($template_dir, $key = null)
  {
    // make sure we're dealing with an array
    $this->template_dir = (array) $this->template_dir;
    if (is_array($template_dir)) {
      foreach ($template_dir as $k => $v) {
        $v = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($v, '/\\')) . ds;
        if (is_int($k)) {
          // indexes are not merged but appended
          $this->template_dir[] = $v;
        } else {
          // string indexes are overridden
          $this->template_dir[$k] = $v;
        }
      }
    } else {
      $v = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($template_dir, '/\\')) . ds;
      if ($key !== null) {
        // override directory at specified index
        $this->template_dir[$key] = $v;
      } else {
        // append new directory
        $this->template_dir[] = $v;
      }
    }
    $this->joined_template_dir = join(directory_separator, $this->template_dir);
    return $this;
  }
  /**
   * get template directories
   *
   * @param mixed $index index of directory to get, null to get all
   *
   * @return array|string list of template directories, or directory of $index
   */
  public function gettemplatedir($index = null)
  {
    if ($index !== null) {
      return isset($this->template_dir[$index]) ? $this->template_dir[$index] : null;
    }
    return (array) $this->template_dir;
  }
  /**
   * set config directory
   *
   * @param $config_dir
   *
   * @return smarty    current smarty instance for chaining
   */
  public function setconfigdir($config_dir)
  {
    $this->config_dir = array();
    foreach ((array) $config_dir as $k => $v) {
      $this->config_dir[$k] = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($v, '/\\')) . ds;
    }
    $this->joined_config_dir = join(directory_separator, $this->config_dir);
    return $this;
  }
  /**
   * add config directory(s)
   *
   * @param string|array    $config_dir directory(s) of config sources
   * @param mixed $key    key of the array element to assign the config dir to
   *
   * @return smarty current smarty instance for chaining
   */
  public function addconfigdir($config_dir, $key = null)
  {
    // make sure we're dealing with an array
    $this->config_dir = (array) $this->config_dir;
    if (is_array($config_dir)) {
      foreach ($config_dir as $k => $v) {
        $v = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($v, '/\\')) . ds;
        if (is_int($k)) {
          // indexes are not merged but appended
          $this->config_dir[] = $v;
        } else {
          // string indexes are overridden
          $this->config_dir[$k] = $v;
        }
      }
    } else {
      $v = preg_replace('#(\w+)(/|\\\\){1,}#', '$1$2', rtrim($config_dir, '/\\')) . ds;
      if ($key !== null) {
        // override directory at specified index
        $this->config_dir[$key] = rtrim($v, '/\\') . ds;
      } else {
        // append new directory
        $this->config_dir[] = rtrim($v, '/\\') . ds;
      }
    }
    $this->joined_config_dir = join(directory_separator, $this->config_dir);
    return $this;
  }
  /**
   * get config directory
   *
   * @param mixed $index index of directory to get, null to get all
   *
   * @return array|string configuration directory
   */
  public function getconfigdir($index = null)
  {
    if ($index !== null) {
      return isset($this->config_dir[$index]) ? $this->config_dir[$index] : null;
    }
    return (array) $this->config_dir;
  }
  /**
   * set plugins directory
   *
   * @param string|array $plugins_dir directory(s) of plugins
   *
   * @return smarty    current smarty instance for chaining
   */
  public function setpluginsdir($plugins_dir)
  {
    $this->plugins_dir = array();
    foreach ((array) $plugins_dir as $k => $v) {
      $this->plugins_dir[$k] = rtrim($v, '/\\') . ds;
    }
    return $this;
  }
  /**
   * adds directory of plugin files
   *
   * @param $plugins_dir
   *
   * @return smarty current smarty instance for chaining
   */
  public function addpluginsdir($plugins_dir)
  {
    // make sure we're dealing with an array
    $this->plugins_dir = (array) $this->plugins_dir;
    if (is_array($plugins_dir)) {
      foreach ($plugins_dir as $k => $v) {
        if (is_int($k)) {
          // indexes are not merged but appended
          $this->plugins_dir[] = rtrim($v, '/\\') . ds;
        } else {
          // string indexes are overridden
          $this->plugins_dir[$k] = rtrim($v, '/\\') . ds;
        }
      }
    } else {
      // append new directory
      $this->plugins_dir[] = rtrim($plugins_dir, '/\\') . ds;
    }
    $this->plugins_dir = array_unique($this->plugins_dir);
    return $this;
  }
  /**
   * get plugin directories
   *
   * @return array list of plugin directories
   */
  public function getpluginsdir()
  {
    return (array) $this->plugins_dir;
  }
  /**
   * set compile directory
   *
   * @param string $compile_dir directory to store compiled templates in
   *
   * @return smarty current smarty instance for chaining
   */
  public function setcompiledir($compile_dir)
  {
    $this->compile_dir = rtrim($compile_dir, '/\\') . ds;
    if (!isset(smarty::$_muted_directories[$this->compile_dir])) {
      smarty::$_muted_directories[$this->compile_dir] = null;
    }
    return $this;
  }
  /**
   * get compiled directory
   *
   * @return string path to compiled templates
   */
  public function getcompiledir()
  {
    return $this->compile_dir;
  }
  /**
   * set cache directory
   *
   * @param string $cache_dir directory to store cached templates in
   *
   * @return smarty current smarty instance for chaining
   */
  public function setcachedir($cache_dir)
  {
    $this->cache_dir = rtrim($cache_dir, '/\\') . ds;
    if (!isset(smarty::$_muted_directories[$this->cache_dir])) {
      smarty::$_muted_directories[$this->cache_dir] = null;
    }
    return $this;
  }
  /**
   * get cache directory
   *
   * @return string path of cache directory
   */
  public function getcachedir()
  {
    return $this->cache_dir;
  }
  /**
   * set default modifiers
   *
   * @param array|string $modifiers modifier or list of modifiers to set
   *
   * @return smarty    current smarty instance for chaining
   */
  public function setdefaultmodifiers($modifiers)
  {
    $this->default_modifiers = (array) $modifiers;
    return $this;
  }
  /**
   * add default modifiers
   *
   * @param array|string $modifiers modifier or list of modifiers to add
   *
   * @return smarty    current smarty instance for chaining
   */
  public function adddefaultmodifiers($modifiers)
  {
    if (is_array($modifiers)) {
      $this->default_modifiers = array_merge($this->default_modifiers, $modifiers);
    } else {
      $this->default_modifiers[] = $modifiers;
    }
    return $this;
  }
  /**
   * get default modifiers
   *
   * @return array list of default modifiers
   */
  public function getdefaultmodifiers()
  {
    return $this->default_modifiers;
  }
  /**
   * set autoload filters
   *
   * @param array $filters filters to load automatically
   * @param string $type  "pre", "output", … specify the filter type to set. defaults to none treating $filters' keys as the appropriate types
   *
   * @return smarty current smarty instance for chaining
   */
  public function setautoloadfilters($filters, $type = null)
  {
    if ($type !== null) {
      $this->autoload_filters[$type] = (array) $filters;
    } else {
      $this->autoload_filters = (array) $filters;
    }
    return $this;
  }
  /**
   * add autoload filters
   *
   * @param array $filters filters to load automatically
   * @param string $type  "pre", "output", … specify the filter type to set. defaults to none treating $filters' keys as the appropriate types
   *
   * @return smarty current smarty instance for chaining
   */
  public function addautoloadfilters($filters, $type = null)
  {
    if ($type !== null) {
      if (!empty($this->autoload_filters[$type])) {
        $this->autoload_filters[$type] = array_merge($this->autoload_filters[$type], (array) $filters);
      } else {
        $this->autoload_filters[$type] = (array) $filters;
      }
    } else {
      foreach ((array) $filters as $key => $value) {
        if (!empty($this->autoload_filters[$key])) {
          $this->autoload_filters[$key] = array_merge($this->autoload_filters[$key], (array) $value);
        } else {
          $this->autoload_filters[$key] = (array) $value;
        }
      }
    }
    return $this;
  }
  /**
   * get autoload filters
   *
   * @param string $type type of filter to get autoloads for. defaults to all autoload filters
   *
   * @return array array( 'type1' => array( 'filter1', 'filter2', … ) ) or array( 'filter1', 'filter2', …) if $type was specified
   */
  public function getautoloadfilters($type = null)
  {
    if ($type !== null) {
      return isset($this->autoload_filters[$type]) ? $this->autoload_filters[$type] : array();
    }
    return $this->autoload_filters;
  }
  /**
   * return name of debugging template
   *
   * @return string
   */
  public function getdebugtemplate()
  {
    return $this->debug_tpl;
  }
  /**
   * set the debug template
   *
   * @param string $tpl_name
   *
   * @return smarty     current smarty instance for chaining
   * @throws smartyexception if file is not readable
   */
  public function setdebugtemplate($tpl_name)
  {
    if (!is_readable($tpl_name)) {
      throw new smartyexception("unknown file '{$tpl_name}'");
    }
    $this->debug_tpl = $tpl_name;
    return $this;
  }
  /**
   * creates a template object
   *
   * @param string $template  the resource handle of the template file
   * @param mixed  $cache_id  cache id to be used with this template
   * @param mixed  $compile_id compile id to be used with this template
   * @param object $parent   next higher level of smarty variables
   * @param boolean $do_clone  flag is smarty object shall be cloned
   *
   * @return object template object
   */
  public function createtemplate($template, $cache_id = null, $compile_id = null, $parent = null, $do_clone = true)
  {
    if ($cache_id !== null && (is_object($cache_id) || is_array($cache_id))) {
      $parent = $cache_id;
      $cache_id = null;
    }
    if ($parent !== null && is_array($parent)) {
      $data = $parent;
      $parent = null;
    } else {
      $data = null;
    }
    // default to cache_id and compile_id of smarty object
    $cache_id = $cache_id === null ? $this->cache_id : $cache_id;
    $compile_id = $compile_id === null ? $this->compile_id : $compile_id;
    // already in template cache?
    if ($this->allow_ambiguous_resources) {
      $_templateid = smarty_resource::getuniquetemplatename($this, $template) . $cache_id . $compile_id;
    } else {
      $_templateid = $this->joined_template_dir . '#' . $template . $cache_id . $compile_id;
    }
    if (isset($_templateid[150])) {
      $_templateid = sha1($_templateid);
    }
    if ($do_clone) {
      if (isset($this->template_objects[$_templateid])) {
        // return cached template object
        $tpl = clone $this->template_objects[$_templateid];
        $tpl->smarty = clone $tpl->smarty;
        $tpl->parent = $parent;
        $tpl->tpl_vars = array();
        $tpl->config_vars = array();
      } else {
        $tpl = new $this->template_class($template, clone $this, $parent, $cache_id, $compile_id);
      }
    } else {
      if (isset($this->template_objects[$_templateid])) {
        // return cached template object
        $tpl = $this->template_objects[$_templateid];
        $tpl->parent = $parent;
        $tpl->tpl_vars = array();
        $tpl->config_vars = array();
      } else {
        $tpl = new $this->template_class($template, $this, $parent, $cache_id, $compile_id);
      }
    }
    // fill data if present
    if (!empty($data) && is_array($data)) {
      // set up variable values
      foreach ($data as $_key => $_val) {
        $tpl->tpl_vars[$_key] = new smarty_variable($_val);
      }
    }
    return $tpl;
  }
  /**
   * takes unknown classes and loads plugin files for them
   * class name format: smarty_plugintype_pluginname
   * plugin filename format: plugintype.pluginname.php
   *
   * @param string $plugin_name class plugin name to load
   * @param bool  $check    check if already loaded
   *
   * @throws smartyexception
   * @return string |boolean filepath of loaded file or false
   */
  public function loadplugin($plugin_name, $check = true)
  {
    // if function or class exists, exit silently (already loaded)
    if ($check && (is_callable($plugin_name) || class_exists($plugin_name, false))) {
      return true;
    }
    // plugin name is expected to be: smarty_[type]_[name]
    $_name_parts = explode('_', $plugin_name, 3);
    // class name must have three parts to be valid plugin
    // count($_name_parts) < 3 === !isset($_name_parts[2])
    if (!isset($_name_parts[2]) || strtolower($_name_parts[0]) !== 'smarty') {
      throw new smartyexception("plugin {$plugin_name} is not a valid name format");
    }
    // if type is "internal", get plugin from sysplugins
    if (strtolower($_name_parts[1]) == 'internal') {
      $file = smarty_sysplugins_dir . strtolower($plugin_name) . '.php';
      if (file_exists($file)) {
        require_once($file);
        return $file;
      } else {
        return false;
      }
    }
    // plugin filename is expected to be: [type].[name].php
    $_plugin_filename = "{$_name_parts[1]}.{$_name_parts[2]}.php";
    $_stream_resolve_include_path = function_exists('stream_resolve_include_path');
    // loop through plugin dirs and find the plugin
    foreach ($this->getpluginsdir() as $_plugin_dir) {
      $names = array(
        $_plugin_dir . $_plugin_filename,
        $_plugin_dir . strtolower($_plugin_filename),
      );
      foreach ($names as $file) {
        if (file_exists($file)) {
          require_once($file);
          return $file;
        }
        if ($this->use_include_path && !preg_match('/^([\/\\\\]|[a-za-z]:[\/\\\\])/', $_plugin_dir)) {
          // try php include_path
          if ($_stream_resolve_include_path) {
            $file = stream_resolve_include_path($file);
          } else {
            $file = smarty_internal_get_include_path::getincludepath($file);
          }
          if ($file !== false) {
            require_once($file);
            return $file;
          }
        }
      }
    }
    // no plugin loaded
    return false;
  }
  /**
   * compile all template files
   *
   * @param string $extension   file extension
   * @param bool  $force_compile force all to recompile
   * @param int  $time_limit
   * @param int  $max_errors
   *
   * @return integer number of template files recompiled
   */
  public function compilealltemplates($extension = '.tpl', $force_compile = false, $time_limit = 0, $max_errors = null)
  {
    return smarty_internal_utility::compilealltemplates($extension, $force_compile, $time_limit, $max_errors, $this);
  }
  /**
   * compile all config files
   *
   * @param string $extension   file extension
   * @param bool  $force_compile force all to recompile
   * @param int  $time_limit
   * @param int  $max_errors
   *
   * @return integer number of template files recompiled
   */
  public function compileallconfig($extension = '.conf', $force_compile = false, $time_limit = 0, $max_errors = null)
  {
    return smarty_internal_utility::compileallconfig($extension, $force_compile, $time_limit, $max_errors, $this);
  }
  /**
   * delete compiled template file
   *
   * @param string $resource_name template name
   * @param string $compile_id  compile id
   * @param integer $exp_time   expiration time
   *
   * @return integer number of template files deleted
   */
  public function clearcompiledtemplate($resource_name = null, $compile_id = null, $exp_time = null)
  {
    return smarty_internal_utility::clearcompiledtemplate($resource_name, $compile_id, $exp_time, $this);
  }
  /**
   * return array of tag/attributes of all tags used by an template
   *
   * @param smarty_internal_template $template
   *
   * @return array of tag/attributes
   */
  public function gettags(smarty_internal_template $template)
  {
    return smarty_internal_utility::gettags($template);
  }
  /**
   * run installation test
   *
   * @param array $errors array to write errors into, rather than outputting them
   *
   * @return boolean true if setup is fine, false if something is wrong
   */
  public function testinstall(&$errors = null)
  {
    return smarty_internal_utility::testinstall($this, $errors);
  }
  /**
   * error handler to mute expected messages
   *
   * @link http://php.net/set_error_handler
   *
   * @param integer $errno error level
   * @param     $errstr
   * @param     $errfile
   * @param     $errline
   * @param     $errcontext
   *
   * @return boolean
   */
  public static function mutingerrorhandler($errno, $errstr, $errfile, $errline, $errcontext)
  {
    $_is_muted_directory = false;
    // add the smarty_dir to the list of muted directories
    if (!isset(smarty::$_muted_directories[smarty_dir])) {
      $smarty_dir = realpath(smarty_dir);
      if ($smarty_dir !== false) {
        smarty::$_muted_directories[smarty_dir] = array(
          'file'  => $smarty_dir,
          'length' => strlen($smarty_dir),
        );
      }
    }
    // walk the muted directories and test against $errfile
    foreach (smarty::$_muted_directories as $key => &$dir) {
      if (!$dir) {
        // resolve directory and length for speedy comparisons
        $file = realpath($key);
        if ($file === false) {
          // this directory does not exist, remove and skip it
          unset(smarty::$_muted_directories[$key]);
          continue;
        }
        $dir = array(
          'file'  => $file,
          'length' => strlen($file),
        );
      }
      if (!strncmp($errfile, $dir['file'], $dir['length'])) {
        $_is_muted_directory = true;
        break;
      }
    }
    // pass to next error handler if this error did not occur inside smarty_dir
    // or the error was within smarty but masked to be ignored
    if (!$_is_muted_directory || ($errno && $errno & error_reporting())) {
      if (smarty::$_previous_error_handler) {
        return call_user_func(smarty::$_previous_error_handler, $errno, $errstr, $errfile, $errline, $errcontext);
      } else {
        return false;
      }
    }
  }
  /**
   * enable error handler to mute expected messages
   *
   * @return void
   */
  public static function muteexpectederrors()
  {
    /*
      error muting is done because some people implemented custom error_handlers using
      http://php.net/set_error_handler and for some reason did not understand the following paragraph:
        it is important to remember that the standard php error handler is completely bypassed for the
        error types specified by error_types unless the callback function returns false.
        error_reporting() settings will have no effect and your error handler will be called regardless -
        however you are still able to read the current value of error_reporting and act appropriately.
        of particular note is that this value will be 0 if the statement that caused the error was
        prepended by the @ error-control operator.
      smarty deliberately uses @filemtime() over file_exists() and filemtime() in some places. reasons include
        - @filemtime() is almost twice as fast as using an additional file_exists()
        - between file_exists() and filemtime() a possible race condition is opened,
         which does not exist using the simple @filemtime() approach.
    */
    $error_handler = array('smarty', 'mutingerrorhandler');
    $previous = set_error_handler($error_handler);
    // avoid dead loops
    if ($previous !== $error_handler) {
      smarty::$_previous_error_handler = $previous;
    }
  }
  /**
   * disable error handler muting expected messages
   *
   * @return void
   */
  public static function unmuteexpectederrors()
  {
    restore_error_handler();
  }
}
// check if we're running on windows
smarty::$_is_windows = strtoupper(substr(php_os, 0, 3)) === 'win';
// let pcre (preg_*) treat strings as iso-8859-1 if we're not dealing with utf-8
if (smarty::$_charset !== 'utf-8') {
  smarty::$_utf8_modifier = '';
}
/**
 * smarty exception class
 *
 * @package smarty
 */
class smartyexception extends exception
{
  public static $escape = false;
  public function __tostring()
  {
    return ' --> smarty: ' . (self::$escape ? htmlentities($this->message) : $this->message) . ' <-- ';
  }
}
/**
 * smarty compiler exception class
 *
 * @package smarty
 */
class smartycompilerexception extends smartyexception
{
  public function __tostring()
  {
    return ' --> smarty compiler: ' . $this->message . ' <-- ';
  }
  /**
   * the line number of the template error
   *
   * @type int|null
   */
  public $line = null;
  /**
   * the template source snippet relating to the error
   *
   * @type string|null
   */
  public $source = null;
  /**
   * the raw text of the error message
   *
   * @type string|null
   */
  public $desc = null;
  /**
   * the resource identifier or template name
   *
   * @type string|null
   */
  public $template = null;
}
/**
 * autoloader
 */
function smartyautoload($class)
{
  $_class = strtolower($class);
  static $_classes = array(
    'smarty_config_source'        => true,
    'smarty_config_compiled'       => true,
    'smarty_security'          => true,
    'smarty_cacheresource'        => true,
    'smarty_cacheresource_custom'    => true,
    'smarty_cacheresource_keyvaluestore' => true,
    'smarty_resource'          => true,
    'smarty_resource_custom'       => true,
    'smarty_resource_uncompiled'     => true,
    'smarty_resource_recompiled'     => true,
  );
  if (!strncmp($_class, 'smarty_internal_', 16) || isset($_classes[$_class])) {
    include smarty_sysplugins_dir . $_class . '.php';
  }
}