ThinkPHP/Lib/Core/Dispatcher.class.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

/**
 * ThinkPHP内置的Dispatcher类
 * 完成URL解析、路由和调度
 * @category   Think
 * @package  Think
 * @subpackage  Core
 * @author    liu21st <liu21st@gmail.com>
 */
class Dispatcher {

    /**
     * URL映射到控制器
     * @access public
     * @return void
     */
    static public function dispatch() {
        $urlMode  =  C('URL_MODEL');
        if(isset($_GET[C('VAR_PATHINFO')])) { // 判断URL里面是否有兼容模式参数
            $_SERVER['PATH_INFO']   = $_GET[C('VAR_PATHINFO')];
            unset($_GET[C('VAR_PATHINFO')]);
        }
        if($urlMode == URL_COMPAT ){
            // 兼容模式判断
            define('PHP_FILE',_PHP_FILE_.'?'.C('VAR_PATHINFO').'=');
        }elseif($urlMode == URL_REWRITE ) {
            //当前项目地址
            $url    =   dirname(_PHP_FILE_);
            if($url == '/' || $url == '\\')
                $url    =   '';
            define('PHP_FILE',$url);
        }else {
            //当前项目地址
            define('PHP_FILE',_PHP_FILE_);
        }

        // 开启子域名部署
        if(C('APP_SUB_DOMAIN_DEPLOY')) {
            $rules      = C('APP_SUB_DOMAIN_RULES');
            if(isset($rules[$_SERVER['HTTP_HOST']])) { // 完整域名或者IP配置
                $rule = $rules[$_SERVER['HTTP_HOST']];
            }else{
                $subDomain  = strtolower(substr($_SERVER['HTTP_HOST'],0,strpos($_SERVER['HTTP_HOST'],'.')));
                define('SUB_DOMAIN',$subDomain); // 二级域名定义
                if($subDomain && isset($rules[$subDomain])) {
                    $rule =  $rules[$subDomain];
                }elseif(isset($rules['*'])){ // 泛域名支持
                    if('www' != $subDomain && !in_array($subDomain,C('APP_SUB_DOMAIN_DENY'))) {
                        $rule =  $rules['*'];
                    }