session问题请教
第一个页面写入session了
$_SESSION['uid']=$rows['uid'];
$_SESSION['uname']=$rows['uname'];
$_SESSION['rname']=$r_rows['rname'];
现在有个问题是跳转到其他一个页面session打开之后里面没有值,麻烦大家解决下
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代码怎么写的? 有没有开启session_start();
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两个页面都需要对SESSION操作前调用 session_start()
你确定做到了吗?
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1,session_start
2,是否session_set_cookie_params设置过cookie的domain为.xxx.com
第二点比较重要,因为比如我的网站叫做www.aa.com,我在浏览器用aa.com访问,结果session失效,为什么?
因为session_start默认以当前访问的URL作为cookie的domain,结果www.aa.com访问时得到一个session-cookie,访问aa.com得到另一个session-cookie,my god。
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What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

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PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

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PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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