本文实例讲述了Yii中实现处理前后台登录的新方法。分享给大家供大家参考,具体如下:因为最近在做一个项目涉及到前后台登录问题,我是把后台作为一个模块(Module)来处理的。我看很多人放两个入口文件index.php和admin.php,然后分别指向前台和后台。这种方法固然很好,可以将前后台完全分离,但我总觉得这种方式有点牵强,这和两个应用啥区别?还不如做两个App用一个framework更好。而且Yii官方后台使用方法也是使用Module的方式。但是Moudle的方式有一个很头疼的问题,就是在使用Cwebuser登录时会出现前后台一起登录一起退出的问题,这显然是不合理的。我纠结了很久才找到下文即将介绍的方法,当然,很多也是参考别人的,自己稍作了改动。我一开始的做法是在后台登录时设置一个isadmin的session,然后再前台登录时注销这个session,这样做只能辨别是前台登录还是后台登录,但做不到前后台一起登录,也即前台登录了后台就退出了,后台登录了前台就退出了。出现这种原因的根本原因是我们使用了同一个Cwebuser实例,不能同时设置前后台session,要解决这个问题就要将前后台使用不同的Cwebuser实例登录。下面是我的做法,首先看protected- config- main.php里对前台user(Cwebuser)的配置:'user'= array( 'html' target='_blank'>class'= 'WebUser',//这个WebUser是继承CwebUser,稍后给出它的代码 'stateKeyPrefix'= 'member',//这个是设置前台session的前缀 'allowAutoLogin'= true,//这里设置允许cookie保存登录信息,一边下次自动登录在你用Gii生成一个admin(即后台模块名称)模块时,会在module- admin下生成一个AdminModule.php文件,该类继承了CWebModule类,下面给出这个文件的代码,关键之处就在该文件,望大家仔细研究:class AdminModule extends CWebModule public function init() // this method is called when the module is being created // you may place code here to customize the module or the application parent::init();//这步是调用main.php里的配置文件 // import the module-level models and componen $this- setImport(array( 'admin.models.*', 'admin.components.*', //这里重写父类里的组件 //如有需要还可以参考API添加相应组件 Yii::app()- setComponents(array( 'errorHandler'= array( 'class'= 'CErrorHandler', 'errorAction'= 'admin/default/error', 'admin'= array( 'class'= 'AdminWebUser',//后台登录类实例 'stateKeyPrefix'= 'admin',//后台session前缀 'loginUrl'= Yii::app()- createUrl('admin/default/login'), ), false); //下面这两行我一直没搞定啥意思,貌似CWebModule里也没generatorPaths属性和findGenerators()方法 //$this- generatorPaths[]='admin.generators'; //$this- controllerMap=$this- findGenerators(); public function beforeControllerAction($controller, $action) if(parent::beforeControllerAction($controller, $action)) $route=$controller- id.'/'.$action- if(!$this- allowIp(Yii::app()- request- userHostAddress) && $route!=='default/error') throw new CHttpException(403,"You are not allowed to access this page."); $publicPages=array( 'default/login', 'default/error', if(Yii::app()- admin- isGuest && !in_array($route,$publicPages)) Yii::app()- admin- loginRequired(); else return true; return false; protected function allowIp($ip) if(empty($this- ipFilters)) return true; foreach($this- ipFilters as $filter) if($filter==='*' || $filter===$ip || (($pos=strpos($filter,'*'))!==false && !strncmp($ip,$filter,$pos))) return true; return false; AdminModule 的init()方法就是给后台配置另外的登录实例,让前后台使用不同的CWebUser,并设置后台session前缀,以便与前台session区别开来(他们同事存在$_SESSION这个数组里,你可以打印出来看看)。这样就已经做到了前后台登录分离开了,但是此时你退出的话你就会发现前后台一起退出了。于是我找到了logout()这个方法,发现他有一个参数$destroySession=true,原来如此,如果你只是logout()的话那就会将session全部注销,加一个false参数的话就只会注销当前登录实例的session了,这也就是为什么要设置前后台session前缀的原因了,下面我们看看设置了false参数的logout方法是如何注销session的:* Clears all user identity information from persistent storage. * This will remove the data stored via {@link setState}.public function clearStates() $keys=array_keys($_SESSION); $prefix=$this- getStateKeyPrefix(); $n=strlen($prefix); foreach($keys as $key) if(!strncmp($key,$prefix,$n)) unset($_SESSION[$key]);看到没,就是利用匹配前缀的去注销的。到此,我们就可以做到前后台登录分离,退出分离了。这样才更像一个应用,是吧?嘿嘿…差点忘了说明一下:Yii::app()- user //前台访问用户信息方法Yii::app()- admin //后台访问用户信息方法不懂的仔细看一下刚才前后台CWebUser的配置。附件1:WebUser.php代码:class WebUser extends CWebUser public function __get($name) if ($this- hasState('__userInfo')) { $user=$this- getState('__userInfo',array()); if (isset($user[$name])) { return $user[$name]; return parent::__get($name); public function login($identity, $duration) { $this- setState('__userInfo', $identity- getUser()); parent::login($identity, $duration); public function login($identity, $duration) { $this- setState('__adminInfo', $identity- getUser()); parent::login($identity, $duration); * UserIdentity represents the data needed to identity a user. * It contains the authentication method that checks if the provided * data can identity the user.class UserIdentity extends CUserIdentity * Authenticates a user. * The example implementation makes sure if the username and password * are both 'demo'. * In practical applications, this should be changed to authenticate * against some persistent user identity storage (e.g. database). * @return boolean whether authentication succeeds. public $user; public $_id; public $username; public function authenticate() $this- errorCode=self::ERROR_PASSWORD_INVALID; $user=User::model()- find('username=:username',array(':username'= $this- username)); if ($user) $encrypted_passwd=trim($user- password); $inputpassword = trim(md5($this- password)); if($inputpassword===$encrypted_passwd) $this- errorCode=self::ERROR_NONE; $this- setUser($user); $this- _id=$user- $this- username=$user- username; //if(isset(Yii::app()- user- thisisadmin)) // unset (Yii::app()- user- thisisadmin); else $this- errorCode=self::ERROR_PASSWORD_INVALID; else $this- errorCode=self::ERROR_USERNAME_INVALID; unset($user); return !$this- errorCode; public function getUser() return $this- user; public function getId() return $this- public function getUserName() return $this- username; public function setUser(CActiveRecord $user) $this- user=$user- attributes;附件4:后台UserIdentity.php代码 * UserIdentity represents the data needed to identity a user. * It contains the authentication method that checks if the provided * data can identity the user.class UserIdentity extends CUserIdentity * Authenticates a user. * The example implementation makes sure if the username and password * are both 'demo'. * In practical applications, this should be changed to authenticate * against some persistent user identity storage (e.g. database). * @return boolean whether authentication succeeds. public $admin; public $_id; public $username; public function authenticate() $this- errorCode=self::ERROR_PASSWORD_INVALID; $user=Staff::model()- find('username=:username',array(':username'= $this- username)); if ($user) $encrypted_passwd=trim($user- password); $inputpassword = trim(md5($this- password)); if($inputpassword===$encrypted_passwd) $this- errorCode=self::ERROR_NONE; $this- setUser($user); $this- _id=$user- $this- username=$user- username; // Yii::app()- user- setState("thisisadmin", "true"); else $this- errorCode=self::ERROR_PASSWORD_INVALID; else $this- errorCode=self::ERROR_USERNAME_INVALID; unset($user); return !$this- errorCode; public function getUser() return $this- admin; public function getId() return $this- public function getUserName() return $this- username; public function setUser(CActiveRecord $user) $this- admin=$user- attributes;希望本文所述对大家基于Yii框架的PHP程序设计有所帮助。PHP教程