php封装的smarty类实例是怎样

* @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