昨天好好耍了一天,今天早上准备到公司学习一些东西,看着时间还早,就果断写一篇。 php
我上次在讲redirect和forward的时候我就说过,这两个函数要正常使用还须要修改一下Route这个类,至少要将好比域名,控制器名,Action名等存储起来,后面调用redirect,forward的时候可使用。 html
如今咱们就转到Route.php,原来这个类的代码很简单: nginx
<?php class Route extends Base { public static function run() { $controller = empty($_GET['c']) ? C('defaultController') : trim($_GET['c']); //设置了默认的控制器 $action = empty($_GET['a']) ? C('defaultAction') : trim($_GET['a']); //设置了默认的Action $controllerBasePath = APP_PATH . '/UserApps/Modules/Controllers/'; $controllerFilePath = $controllerBasePath . $controller . 'Controller.php'; if(is_file($controllerFilePath)) { include $controllerFilePath; $controllerName = $controller . 'Controller'; if(class_exists($controllerName)) { $controllerHandler = new $controllerName(); if(method_exists($controllerHandler,$action)) { $controllerHandler->$action(); } else { echo 'the method does not exists'; } } else { echo 'the class does not exists'; } } else { echo 'controller not exists'; } } }
如今咱们须要将域名取出来,那怎么弄呢? apache
实际上PHP有一个强大的超全局变量$_SERVER,不少信息都存储在这里面,咱们能够查看一下: 服务器
<?php var_dump($_SERVER);咱们注意到这里面有一个 HTTP_HOST属性,查看PHP手册,这么写的:
咱们继续搜索一下: 函数
发现REQUEST_URI,SCRIPT_FILENAME,SCRIPT_NAME,PHP_SELF的值都为/test/test.php,查询PHP手册解释分别为: 学习
1. The URI which was given in order to access this page; for instance, '/index.html' 测试
2. The absolute pathname of the currently executing script. this
3.Contains the current script's path. This is useful for pages which need to point to themselves. The __FILE__ constant contains the full path and filename of the current (i.e. included) file. spa
4. The filename of the currently executing script, relative to the document root. For instance, $_SERVER['PHP_SELF'] in a script at the address http://example.com/test.php/foo.bar would be /test.php/foo.bar. The __FILE__ constant contains the full path and filename of the current (i.e. included) file. If PHP is running as a command-line processor this variable contains the script name since PHP 4.3.0. Previously it was not available.
咱们发现REQUEST_URI比较靠谱,固然,我这个地方测试的是apache的状况,nginx,iis等还有在.htaccess文件设置了rewrite规则后又不同,若是真要写一个好的Route,考虑的东西会很是多的,针对于URL的普通模式,PATHINFO模式,REWRITE模式,兼容模式,咱们使用最普通的方式。
首先咱们定义一个存储路径的类,Path.php:
<?php class Path extends Base { private static $_base = ''; private static $_controller = ''; private static $_action = ''; public static function setBasePath($base) { self::$_base = $base; } public static function setController($controller) { self::$_controller = $controller; } public static function setAction($action) { self::$_action = $action; } public static function getBasePath() { return self::$_base; } public static function getController() { return self::$_controller; } public static function getAction() { return self::$_action; } }就像Java中pojo,这个类只有setter和getter,我就很少讲了。
而后再看看Route.php,首先仍是获取URL,怎么获取呢?
$_SERVER['HTTP_HOST'] . substr($_SERVER['REQUEST_URI'],0,strrpos($_SERVER['REQUEST_URI'],'/'))
因为以前已经讲了HTTP_HOST和REQUEST_URI的做用了,这段代码主要就说一下后面的substr和strrpos,substr就是截断字符串,strrpos是获取某一个子字符串在父字符串中最后一次出现的位置。
PS:我这样写得仍是有问题的,可是为了简便,不弄复杂了。
而后就是将这些值存储到Path中,
Path::setBasePath($_SERVER['HTTP_HOST'] . substr($_SERVER['REQUEST_URI'],0,strrpos($_SERVER['REQUEST_URI'],'/'))); Path::setController($controller); Path::setAction($action);设置了这些参数以后,在Controller.php中的redirect和forward的代码也要稍作修改:
<?php class Controller extends Base { protected function _redirect(Array $arr) { array_key_exists('controller',$arr) || $arr['controller'] = Path::getContrller(); array_key_exists('action',$arr) || $arr['action'] = Path::getAction();; $str = 'http://' . Path::getBasePath() . '/index.php?'; foreach($arr as $key => $val) { if(!is_int($key)) { $str .= ($key . '=' . $val . '&'); } } $str = substr($str,0,strlen($str) - 1); Response::redirect($str); } protected function _forward(Array $arr) { $controller = Path::getController(); $action = Path::getAction(); if(array_key_exists('controller',$arr)) { $controller = $arr['controller']; } if(array_key_exists('action',$arr)) { $action = $arr['action']; } $controller .= 'Controller'; if($controller === get_class()) { if(method_exists($this,$action)) { $this->$action(); } else { //时间有限,不写逻辑了 } } else { if(class_exists($controller)) { $class = new $controller(); if(method_exists($class,$action)) { $class->$action(); } else { //时间有限,不写了 } } else { //时间有限,不写了 } } } protected function _assign(Array $arr) { View::assign($arr); } protected function _display($str) { if(is_string($str)) { $str = str_replace(array( '.','#' ),array( '/','.' ),$str); View::display(MODULES_PATH . View::VIEW_BASE_PATH . $str . '.php'); } } }这个里面主要的改动就是控制器和Action的获取变成了调用Path类的方法,还有_redirect中,$str = 'http://' . Path::getBasePath() . '/index.php?',这里我假设使用的时http协议,而且不存在rewrite,服务器采用的是apache。
搞定以后再使用_redirect和_forward,发现是否是没有问题了?
代码点此下载