框架url解析

<?php/***url解析分发类**/class Route{    private $_module;private $_controller;private $_action;private $_requestParam = array();private $_rules = array(); public function __construct(){    $this->_module = '';$this->_controller = C('defaultController');$this->_action = C('defaultAction');$this->_rules = C('urlManager=>rules');}     /***获取模型名称**/public function getModule(){return $this->_module;}     /***获取控制器名称**/public function getController(){return $this->_controller;}     /***获取动作名称**/public function getAction(){return $this->_action;}     /***设置请求参数数组，解析二级域名**/    private function parse(){//先检查二级域名$modules = C('modules');if($modules) //只有设置了模块才检查{$host = $_SERVER['HTTP_HOST'];if(C('domain') && $pos = strpos($host,C('domain'))){$preffix = substr($host,0,$pos-1);if($pos = strrpos($preffix,'.')){$preffix = substr($preffix,$pos);}if(in_array($preffix,$modules)){$this->_module = $preffix;}}}}   /***  解析普通参数**/private function parseParam($controllerObj){$num=count($this->_requestParam);if($num == 0)return;for($i=0,$num=count($this->_requestParam);$i<$num;$i+=2){            $controllerObj->setParam($this->_requestParam[$i],$this->_requestParam[$i+1]);}}     /***  url解析规则*  1. 'variable/varialbe:regexp>'=>'controller/action',*  2. 'variable/variable'=>'controller/action',*  3. 'variable/variable/:varialbe|regexp'=>'controller/action',*  4. 'variable/:variable|regexp/varialbe'=>'controller/action',*  5. 'variable/variable/*'=>'controller/action',*  desc :开头的是变量，|后面的正则是变量匹配类型，如果没有，则是任意变量**/private function rule(){$parseParam = array();$requestParamNum = count($this->_requestParam);foreach($this->_rules as $rule=>$path){$ruleParam = explode('/',$rule);$ruleParamNum = count($ruleParam);            if(($ruleParam[$ruleParamNum-1] == '*' && $requestParamNum >= $ruleParamNum-1) || $requestParamNum == $ruleParamNum)//rule满足初始条件{                foreach($ruleParam as $key=>$value){if($value == '*'){break;}if(substr($value,0,1) == ':'){$value = substr($value,1);    if(strpos($value,'|'))    {       list($value,$regexp)=explode('|',$value);   if(!preg_match("/$regexp/",$this->_requestParam[$key]))   {                               $parseParam = array();                               break;   }    }                        $parseParam[] = $value; //参数名    $parseParam[] = $this->_requestParam[$key]; //参数值}else if(strcasecmp($value,$this->_requestParam[$key])){                         $parseParam = array();  break;}}if($parseParam){$pathParam = explode('/',$path);break;}}} if($parseParam && $key == $ruleParamNum-1) //匹配了{if($ruleParam[$ruleParamNum-1] == '*' && $requestParamNum >= $ruleParamNum){                   for(;$key<$requestParamNum;$key++)   $parseParam[] = $this->_requestParam[$key];}                $this->_requestParam = array_merge($pathParam,$parseParam);unset($parseParam);}}     /***  执行控制器方法**/public function run(){$this->parse();        if($_SERVER['REQUEST_URI'])        {$this->_requestParam = explode('/',trim($_SERVER['REQUEST_URI'],'/'));if($this->_rules)//存在路由规则{$this->rule(); //本次请求满足路由规则}if($modules && $this->_module == '' && in_array($this->_requestParam[0],$modules)){$this->_module = $this->_requestParam[0];array_shift($this->_requestParam);}//print_r($this->_requestParam);$controllerPath = APP_PATH.DS.($this->_module?'modules'.DS.$this->_module.DS:'').'controllers'.DS;if(file_exists($controllerPath.$this->_requestParam[0].'Controller.class.php')){                $this->_controller = $this->_requestParam[0];array_shift($this->_requestParam);}} $controllerClass = $this->_controller.'Controller';        import($controllerClass,$controllerPath,'class');$controllerObj = new $controllerClass($this);    $this->_requestParam[0]; if($this->_requestParam[0] && method_exists($controllerObj,$this->_requestParam[0].'Action')){            $this->_action = $this->_requestParam[0];array_shift($this->_requestParam);}$this->parseParam($controllerObj); //对象时引用方式 try{$action = $this->_action.'Action';             $controllerObj->$action();}catch(Exception $e){$this->rediretUrl('/');}}     /***  url重定向**/public function rediret($url){header('location:'.$url);}     /*** 生成url方法，需要逆解析rule规则**/public function url($controller,$action,$param,$module = ''){         $urlPath = $controller.'/'.$action;if($module)             $urlPath = $module .'/'. $urlPath;$parseParam = array();if($this->_rules){$ruleArr = array();     foreach($this->_rules as $rule=>$path){if($path ==  $urlPath){$ruleArr[] = $rule;}}if($ruleArr){foreach($ruleArr as $rule){                     $ruleParam = explode('/',$rule);foreach($ruleParam as $key=>$value){if(substr($value,0,1) == ':'){                             $value = substr($value,1);if(strpos($value,'|')){     list($value,$regexp)=explode('|',$value);}else{$regexp = '';}if(isset($param[$value]) && (!$regexp || preg_match("/$regexp/",$param[$value]))){                                 $parseParam[] = $param[$value];unset($param[$value]);}else{                                 $parseParam = array();break;}}else{$parseParam[] = $value;}}if($parseParam)break;} //foreach($ruleArr as $rule)if($parseParam)                    $urlPath = implode('/',$parseParam);} //if($ruleArr)} //if($this->_rules)if($param){foreach($param as $key=>$value){                 $urlPath .= '/'.$key.'/'.$value;}}return $urlPath;}}