框架开发(三)---smarty整合

一 smarty 是什么

　　Smarty是一个PHP的模板引擎。更明确来说，它可以帮助开发者更好地分离程序逻辑和页面显示。最好的例子，是当程序员和模板设计师是不同的两个角色的情况，而且大部分时候都不是同一个人的情况。smarty 从开发层面上保证了程序员的"单一职责性Single"和"接口隔离 Interface Separate",PHP程序员更集中于逻辑处理,前端程序员更集中于页面展示.程序员修改业务逻辑不会影响前台显示,页面工程师修改页面不会影响逻辑.

二 smarty原理

　　tpl文件编译成php文件,smarty变量用php变量替换掉,然后输出到浏览器.贴上部分代码.

  1 class Smarty extends Smarty_Internal_TemplateBase
  2 {
  3     const SMARTY_VERSION = '3.1.27';
  4     ...
  5     const PLUGIN_MODIFIERCOMPILER = 'modifiercompiler';
  6     public static $global_tpl_vars = array();
  7     Smarty::muteExpectedErrors()
  8     public static $_previous_error_handler = null;
  9     public static $_muted_directories = array('./templates_c/' => null, './cache/' => null);
 10 
 11     public static $_MBSTRING = SMARTY_MBSTRING;
 12     public static $_CHARSET = SMARTY_RESOURCE_CHAR_SET;
 13     public static $_DATE_FORMAT = SMARTY_RESOURCE_DATE_FORMAT;
 14     public static $_UTF8_MODIFIER = 'u';
 15     public static $_IS_WINDOWS = false;
 16     private $template_dir = array('./templates/');
 17     public $joined_template_dir = './templates/';
 18     public $joined_config_dir = './configs/';
 19     private $compile_dir = './templates_c/';
 20     private $plugins_dir = null;
 21     private $cache_dir = './cache/';
 22     private $config_dir = array('./configs/');
 23     public $force_compile = false;
 24     public $merge_compiled_includes = false;
 25     public $inheritance_merge_compiled_includes = true;
 26     public $force_cache = false;
 27     public $left_delimiter = "{";
 28     public $right_delimiter = "}";
 29     ...
 30     /**
 31      * Initialize new Smarty object
 32      */
 33     public function __construct()
 34     {
 35         if (is_callable('mb_internal_encoding')) {
 36             mb_internal_encoding(Smarty::$_CHARSET);
 37         }
 38         $this->start_time = microtime(true);
 39         // check default dirs for overloading
 40         if ($this->template_dir[0] !== './templates/' || isset($this->template_dir[1])) {
 41             $this->setTemplateDir($this->template_dir);
 42         }
 43         if ($this->config_dir[0] !== './configs/' || isset($this->config_dir[1])) {
 44             $this->setConfigDir($this->config_dir);
 45         }
 46         if ($this->compile_dir !== './templates_c/') {
 47             unset(self::$_muted_directories['./templates_c/']);
 48             $this->setCompileDir($this->compile_dir);
 49         }
 50         if ($this->cache_dir !== './cache/') {
 51             unset(self::$_muted_directories['./cache/']);
 52             $this->setCacheDir($this->cache_dir);
 53         }
 54         if (isset($this->plugins_dir)) {
 55             $this->setPluginsDir($this->plugins_dir);
 56         } else {
 57             $this->setPluginsDir(SMARTY_PLUGINS_DIR);
 58         }
 59         if (isset($_SERVER['SCRIPT_NAME'])) {
 60             Smarty::$global_tpl_vars['SCRIPT_NAME'] = new Smarty_Variable($_SERVER['SCRIPT_NAME']);
 61         }
 62 
 63         // Check if we're running on windows
 64         Smarty::$_IS_WINDOWS = strtoupper(substr(PHP_OS, 0, 3)) === 'WIN';
 65 
 66         // let PCRE (preg_*) treat strings as ISO-8859-1 if we're not dealing with UTF-8
 67         if (Smarty::$_CHARSET !== 'UTF-8') {
 68             Smarty::$_UTF8_MODIFIER = '';
 69         }
 70     }
 71 
 72     /**
 73      * fetches a rendered Smarty template
 74      *
 75      */
 76     public function fetch($template = null, $cache_id = null, $compile_id = null, $parent = null, $display = false, $merge_tpl_vars = true, $no_output_filter = false)
 77     {
 78         if ($cache_id !== null && is_object($cache_id)) {
 79             $parent = $cache_id;
 80             $cache_id = null;
 81         }
 82         if ($parent === null) {
 83             $parent = $this;
 84         }
 85         // get template object
 86         $_template = is_object($template) ? $template : $this->createTemplate($template, $cache_id, $compile_id, $parent, false);
 87         // set caching in template object
 88         $_template->caching = $this->caching;
 89         // fetch template content
 90         return $_template->render(true, false, $display);
 91     }
 92 
 93     /**
 94      * displays a Smarty template
 95      *
 96      */
 97     public function display($template = null, $cache_id = null, $compile_id = null, $parent = null)
 98     {
 99         // display template
100         $this->fetch($template, $cache_id, $compile_id, $parent, true);
101     }
102 
103     /**
104      * Check if a template resource exists
105      */
106     public function templateExists($resource_name)
107     {
108         $save = $this->template_objects;
109         $tpl = new $this->template_class($resource_name, $this);
110         $result = $tpl->source->exists;
111         $this->template_objects = $save;
112 
113         return $result;
114     }
115 
116     public function __get($name)
117     {
118         $allowed = array('template_dir' => 'getTemplateDir', 'config_dir' => 'getConfigDir',
119                          'plugins_dir'  => 'getPluginsDir', 'compile_dir' => 'getCompileDir',
120                          'cache_dir'    => 'getCacheDir',);
121 
122         if (isset($allowed[$name])) {
123             return $this->{$allowed[$name]}();
124         } else {
125             trigger_error('Undefined property: ' . get_class($this) . '::$' . $name, E_USER_NOTICE);
126         }
127     }
128 
129     /**
130      * <<magic>> Generic setter.
131      */
132     public function __set($name, $value)
133     {
134         $allowed = array('template_dir' => 'setTemplateDir', 'config_dir' => 'setConfigDir',
135                          'plugins_dir'  => 'setPluginsDir', 'compile_dir' => 'setCompileDir',
136                          'cache_dir'    => 'setCacheDir',);
137 
138         if (isset($allowed[$name])) {
139             $this->{$allowed[$name]}($value);
140         } else {
141             trigger_error('Undefined property: ' . get_class($this) . '::$' . $name, E_USER_NOTICE);
142         }
143     }

实现思想不算难,但是第一:已经有成熟的工具smarty了,所以不必重复开发,而且smarty实现的功能足够强大;第二:smarty 的受众足够广,学习成本低.

所以,不再开发,整合smarty到框架里面吧.

三整合

　　1.下载smarty :

1 https://github.com/phpseasa/smarty

　　2.整合进框架,源码上面已经分析过,大部分的配置在构造方法里.

　　所以直接引入.奉上代码.

 1 /**
 2  * @ file smarty 入口文件
 3  * @ author yuxing@sina.book.com
 4  */
 5 
 6 //define('SMARTY_PATH',dirname(__FILE__).'/'); 
 7 //echo SMARTY_PATH.'Smarty.class'.EXT;exit;
 8 //require_once(SMARTY_PATH.'Smarty.class'.EXT);
 9 
10 class Mysmarty extends Smarty{
11     public function __construct()
12     { 
13         parent::__construct();
14         $this->template_dir =  APP_PATH."views";
15         $this->compile_dir = APP_PATH."templates_c";
16         $this->cache_dir = APP_PATH."cache";
17         $this->caching = 0;
18         $this->debugging = true;
19         $this->compile_check = true;
20         $this->left_delimiter = "{";
21         $this->right_delimiter = "}";
22     }
23 }

如此配置完毕,

 1 require_once(SYS_PATH.'smarty'.DIRECTORY_SEPARATOR.'smarty'.EXT);
 2 class Controller {
 3     private static $instance;
 4     /**
 5      * Constructor
 6      */
 7     public function __construct()
 8     {
 9         self::$instance =& $this;
10         $this->smarty = new Mysmarty()

在控制器中调用,

1     public function __construct(){  
2         parent::__construct();
3     }
4     public function test(){  
5         $smarty=$this->smarty;
6 //        var_dump($this->smarty);
7         $smarty->assign('test','111');
8         $smarty->display('test.tpl');
9     }

写模板文件

1 this is a test framework ,there are so many things not going well!!!
2 
3 {$test}

页面触发

同时弹出了smarty的debug页面.

well ,done!!

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posted on 2015-12-01 11:53 任城三爷阅读(506) 评论(0) 编辑收藏举报