数据表category: category_id category_titlesubcategory:subcategory_id subcategory_category(与category_id关联) 在删除category表的数据时,要确保category_id在subcategory_category中不存在控制器: public function actionDelete($id) { if(Yii::app()->request->isPostRequest) { $model=$this->loadModel($id); $results = Category::getSubCategorySet($id); //查找当前category_id是否在subcategory_category中存在 //存在的话,就要提醒用户 //我这里是通过抛异常来提醒用户的,但我不想要错误编号的出现 //或者你们有更好的方法可以告诉我 if($results!=0){ throw new CHttpException(400,'This title is use on sub-category management'); }else{ $model = $this->loadModel($id); $model->category_status = 'D'; if ($model->validate()) { $model->save(); } // $model->delete(); // if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser if(!isset($_GET['ajax'])) $this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin')); } }
回复讨论(解决方案)
你改下异常的那个view去掉错误编号好了
你改下异常的那个view去掉错误编号好了
异常的那个view去掉错误编号,这个找不到
你改下异常的那个view去掉错误编号好了
异常的那个view去掉错误编号,这个找不到
不是异常之后还是会显示一些内容吗?会有个默认的view,叫error还是什么的.
在那个view里把错误标号不显示是不是可以满足你要求?
SiteController.phppublic function actionError() { if($error=Yii::app()->errorHandler->error) { if(Yii::app()->request->isAjaxRequest) echo $error['message']; //去掉这个就不会显示错误信息 但错误编号还在 Error:400 else $this->render('error', $error); } }site视图下有 error.php 整个删掉都没影响

Reasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.

Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.


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