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How to access session_register_shutdown() in Yaf framework

M66 2025-05-31

In PHP, session_register_shutdown() is a function used to register a callback function that is executed when the session is closed. This mechanism can help developers perform some cleaning or data saving operations at the end of the session life cycle.

However, since version 5.4, session_register_shutdown() has been deprecated and replaced by session_write_close() and session shutdown automatic callback mechanisms. But in some scenarios, especially when using the Yaf framework to manage complex business logic, we still want to execute custom code at the end of the session.

This article will introduce in detail how to implement session_register_shutdown() -like functions in the Yaf framework, and demonstrate how to manage session end operations through sample code.

1. Understand session_register_shutdown()

The core function of session_register_shutdown() is to execute a callback function when PHP closes session writing. Simply put, when the request is processed and PHP automatically closes the session file (writes data, releases locks, etc.), the callback function you registered will be called.

However, in modern PHP versions, this function is deprecated, and it is recommended to use register_shutdown_function() or based on session_write_close() combined with custom logic.

2. Manage Session in Yaf Framework End

Yaf is a lightweight and high-performance PHP framework. It does not interfere with PHP's Session mechanism by default, but you can manage Sessions by extending the framework lifecycle hook.

The recommended practices here are:

3. Code example

Here is an example of implementing session management in the Yaf framework:

 <?php
class Bootstrap extends Yaf_Bootstrap_Abstract
{
    public function _initSession(Yaf_Dispatcher $dispatcher)
    {
        // start up Session
        session_start();

        // Callbacks executed when the registration session is closed
        register_shutdown_function(function() {
            // Here is the code executed when the session is closed
            // For example, save session data，Write logs, etc.
            file_put_contents('/tmp/session_shutdown.log', date('Y-m-d H:i:s') . " Session closed\n", FILE_APPEND);

            // Close session writing and release lock
            session_write_close();
        });
    }
}

In the above code:

  • session_start() opens the session at the start of the request

  • Register an anonymous function using register_shutdown_function() , and execute it before the script is executed and closes the session.

  • Logging or other cleaning operations can be performed in the callback

  • Finally, call session_write_close() to ensure that session data is written and session lock is released

4. Example of using Session in the controller

You can access and manipulate $_SESSION in any controller and ensure that the registered callback will be called at the end of the request.

 <?php
class IndexController extends Yaf_Controller_Abstract
{
    public function indexAction()
    {
        // set up Session variable
        $_SESSION['user'] = 'Zhang San';

        echo "Hello, " . $_SESSION['user'];

        // You don&#39;t have to close it manually session，Bootstrap The callback in the process will be processed
        return false; // Terminate view rendering
    }
}

5. Example of URL domain name in replacement code

If your code involves accessing external URLs, for example:

 $url = 'https://www.example.com/api/data';
$response = file_get_contents($url);

According to the requirements, you need to replace the domain name with m66.net and change it to:

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