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  • php封装的smarty类完整实例

    正文概述    2023-03-24   157

    本文实例讲述了php封装的smarty类。分享给大家供大家参考,具体如下:

    <?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';
      }
    }
    
    

    希望本文所述对大家基于smarty模板的PHP程序设计有所帮助。


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