Yii分析6：CHttpRequest
官方说明：CHttpRequest封装了$_SERVER变量，同时解决了不同web服务器之间一致性的问题。
/** * 返回当前请求的路径. * 头尾的斜线会被去除掉 * 注意从1.1.4开始pathinfo被编码 * 在1.1.4之前, 是否被编码取决于服务器 * (大部分情况未编码). */ public function getPathInfo() { if($this->_pathInfo===null) { $pathInfo=$this->getRequestUri(); if(($pos=strpos($pathInfo,'?'))!==false) $pathInfo=substr($pathInfo,0,$pos); $pathInfo=urldecode($pathInfo); $scriptUrl=$this->getScriptUrl(); $baseUrl=$this->getBaseUrl(); if(strpos($pathInfo,$scriptUrl)===0) $pathInfo=substr($pathInfo,strlen($scriptUrl)); else if($baseUrl==='' || strpos($pathInfo,$baseUrl)===0) $pathInfo=substr($pathInfo,strlen($baseUrl)); else if(strpos($_SERVER['PHP_SELF'],$scriptUrl)===0) $pathInfo=substr($_SERVER['PHP_SELF'],strlen($scriptUrl)); else throw new CException(Yii::t('yii','CHttpRequest is unable to determine the path info of the request.')); $this->_pathInfo=trim($pathInfo,'/'); } return $this->_pathInfo;}/** * 返回请求URI * 指的是跟在host info后面的部分 * 包含了 query string * 这个方法的实现参考了Zend框架中的Zend_Controller_Request_Http. * @return string the request URI portion for the currently requested URL. * @throws CException if the request URI cannot be determined due to improper server configuration * @since 1.0.1 */ public function getRequestUri() { if($this->_requestUri===null) { if(isset($_SERVER['HTTP_X_REWRITE_URL'])) // IIS $this->_requestUri=$_SERVER['HTTP_X_REWRITE_URL']; else if(isset($_SERVER['REQUEST_URI'])) { $this->_requestUri=$_SERVER['REQUEST_URI']; if(isset($_SERVER['HTTP_HOST']))//来自header { if(strpos($this->_requestUri,$_SERVER['HTTP_HOST'])!==false) $this->_requestUri=preg_replace('/^\w+:\/\/[^\/]+/','',$this->_requestUri); } else $this->_requestUri=preg_replace('/^(http|https):\/\/[^\/]+/i','',$this->_requestUri); } else if(isset($_SERVER['ORIG_PATH_INFO'])) // IIS 5.0 CGI { $this->_requestUri=$_SERVER['ORIG_PATH_INFO']; if(!empty($_SERVER['QUERY_STRING'])) $this->_requestUri.='?'.$_SERVER['QUERY_STRING']; } else throw new CException(Yii::t('yii','CHttpRequest is unable to determine the request URI.')); } return $this->_requestUri; }?