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emlog结构解析 MVC的显示方式及模板的调度过程

字数
898 字
阅读时间
5 分钟
更新日期
8/8/2016

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最近在看emlog的源码,觉得写得不错的地方就记录下来。作为一名phper的新手,觉得里面有很多地方值得借(chao)鉴(xi)的。另外最近想修改emlog的内核使之可以兼容WordPress的模板(想法),所以想研究下emlog。

首先要学习的是emlog MVC设计模式,(听说emlog没有用框架是自己写的),MVC即使model view Controller的缩写,是模型(model)-视图(view)-控制器(controller)的缩写

但严格来说,emlog只有MC没有V,emlog的view类似于WordPress的,模板都是由.php组成,里面调用内置的函数。

Emlog加载时调用了**_autoload** 这个函数的功能是自动寻找调用的Class

所以所有的类都在include这个目录下

首页index.php调用的

php
define('TEMPLATE_PATH', TPLS_PATH.Option::get('nonce_templet').'/');//前台模板路径
$emDispatcher = Dispatcher::getInstance();
$emDispatcher->dispatch();
View::output();

是模板显示的关键,,转到Dispatcher这个类就可以看到实现的方法

php
public static function getInstance() {//大概功能就是创建这个类
        if(self::$_instance == null) {
            self::$_instance = new Dispatcher();
            return self::$_instance;
        } else {
            return self::$_instance;
        }
    }
 
    private function __construct() {//初始化就调用的类
        $this->_path = $this->setPath();
        $this->_routingTable = Option::getRoutingTable();
 
        $urlMode = Option::get('isurlrewrite');
        foreach ($this->_routingTable as $route) {
            if (!isset($route['reg_' . $urlMode])) {
                $reg = isset($route['reg']) ? $route['reg'] : $route['reg_0'];
            } else {
                $reg = $route['reg_' . $urlMode];
            }
            if (preg_match($reg, $this->_path, $matches)) {
                $this->_model = $route['model'];
                $this->_method = $route['method'];
                $this->_params = $matches;
                break;
            } elseif (preg_match($route['reg_0'], $this->_path, $matches)) {
                $this->_model = $route['model'];
                $this->_method = $route['method'];
                $this->_params = $matches;
                break;
            }
        }
 
        if (empty($this->_model)) {
            show_404_page();
        }
    }
 
    public function dispatch(){
        $module = new $this->_model();
        $method = $this->_method;
        $module->$method($this->_params);
}

在贴上

php
$this->_routingTable = Option::getRoutingTable();

的实现方法

php
static function getRoutingTable(){
$routingtable = array(
array(
'model' => 'calendar',
'method' => 'generate',
'reg_0' => '|^.*/\?action=cal|',
),
array(
'model' => 'Log_Controller',
'method' => 'displayContent',
'reg_0' => '|^.*/\?(post)=(\d+)(&(comment-page)=(\d+))?([\?&].*)?$|',
'reg_1' => '|^.*/(post)-(\d+)\.html(/(comment-page)-(\d+))?/?([\?&].*)?$|',
'reg_2' => '|^.*/(post)/(\d+)(/(comment-page)-(\d+))?/?$|',
'reg_3' => '|^/([^\./\?=]+)(\.html)?(/(comment-page)-(\d+))?/?([\?&].*)?$|',
),
array(
'model' => 'Record_Controller',
'method' => 'display',
'reg_0' => '|^.*/\?(record)=(\d{6,8})(&(page)=(\d+))?([\?&].*)?$|',
'reg' => '|^.*/(record)/(\d{6,8})/?((page)/(\d+))?/?([\?&].*)?$|',
),
array(
'model' => 'Sort_Controller',
'method' => 'display',
'reg_0' => '|^.*/\?(sort)=(\d+)(&(page)=(\d+))?([\?&].*)?$|',
'reg' => '|^.*/(sort)/([^\./\?=]+)/?((page)/(\d+))?/?([\?&].*)?$|',
),
array(
'model' => 'Tag_Controller',
'method' => 'display',
'reg_0' => '|^.*/\?(tag)=([^&]+)(&(page)=(\d+))?([\?&].*)?$|',
'reg' => '|^.*/(tag)/([^/?]+)/?((page)/(\d+))?/?([\?&].*)?$|',
),
array(
'model' => 'Author_Controller',
'method' => 'display',
'reg_0' => '|^.*/\?(author)=(\d+)(&(page)=(\d+))?([\?&].*)?$|',
'reg' => '|^.*/(author)/(\d+)/?((page)/(\d+))?/?([\?&].*)?$|',
),
array(
'model' => 'Log_Controller',
'method' => 'display',
'reg_0' => '|^.*/\?(page)=(\d+)([\?&].*)?$|',
'reg' => '|^.*/(page)/(\d+)/?([\?&].*)?$|',
),
array(
'model' => 'Search_Controller',
'method' =>'display',
'reg_0' => '|^.*/\?(keyword)=([^/&]+)(&(page)=(\d+))?([\?&].*)?$|',
),
array(
'model' => 'Comment_Controller',
'method' => 'addComment',
'reg_0' => '|^.*/\?(action)=(addcom)([\?&].*)?$|',
),
array(
'model' => 'Plugin_Controller',
'method' => 'loadPluginShow',
'reg_0' => '|^.*/\?(plugin)=([\w\-]+).*([\?&].*)?$|',
),
array(
'model' => 'Log_Controller',
'method' => 'displayContent',
'reg_0' => '|^.*?/([^/\.=\?]+)(\.html)?(/(comment-page)-(\d+))?/?([\?&].*)?$|',
),
array(
'model' => 'Log_Controller',
'method' => 'display',
'reg_0' => '|^/?([\?&].*)?$|',
),
);
return $routingtable;
}

上面函数就是具体的调用函数了,'model' 是class类,'method' 是显示方式,'reg_'是通过地址的正则,想修改自定义url的修改这里就可以了。通过这种方法就直接调用了控制器,通过控制器看到首页的控制方法

前面可以理解为emlog内置的变量

后面的

include View::getView('header');

include View::getView('log_list');

就是调用的我们博客模板了。

其他都是类似

另外说下emlog源码有空行的解决办法

Emlog即使在默认的default模板上也有一行空白

虽然没什么大碍,但强迫症很可怕。。

解决办法:

在mothod.php 搜索 widget_link

然后到结尾 或者直接调到默认模板第219行

会发现后面就个空格,删除掉即可

撰写