php后台如何避免用户直接进入方法实例

1）创建BaseController控制器继承Controller（后台的一切操作要继承BaseController):

在BaseController里面添加：

public function checkLogin() {         if (Yii::app()->authority->isLogin() == Yii::app()->authority->getStatus('NOTLOGIN')) { 
            $url = $this->createUrl('user/login'); 
            if (Yii::app()->request->isPostRequest && Yii::app()->request->isAjaxRequest) { 
                echo json_encode(array('code' => -101, 'message' => '用户未登录。', 'callback' => 'window.location="' . $url . '";')); 
            } else if (Yii::app()->request->isAjaxRequest) { 
                echo '<script language="javascript">window.location="' . $url . '";</script>'; 
            } else { 
                $this->redirect($url); 
            } 
            exit; 
        } 
        return true; 
    }

在components目录下创建Authority.php文件：

<?php /** 
 * 权限检查组件 
 */
class Authority extends CComponent { 
    private $NOTLOGIN = -1; 
    private $FAILED = -2; 
    private $PASS = 1; 
    public function init() { 
    } 
    /** 
     * 检查是否登陆 
     * @return boolean  
     */
    function isLogin() { 
        return isset(Yii::app()->session['user']) ? $this->PASS : $this->NOTLOGIN; 
    } 
   
    /** 
     * 获取状态值 
     * @param string $name 
     * @return int  
     */
    public function getStatus($name){ 
        return $this->$name; 
    } 
}