Backend Development
PHP Tutorial
In PHP, how to solve the problem that the first request is empty when using session to cache WeChat access_token?
In PHP, how to solve the problem that the first request is empty when using session to cache WeChat access_token?
Apr 01, 2025 am 10:45 AM
Optimization strategies for PHP WeChat access_token cache and Session
In PHP development, using Session to cache WeChat access_token often leads to the problem of empty first request. This article analyzes this problem and provides an optimization solution.
Problem description
Access_token is required for WeChat interface calls. Developers often store it in a Session to improve efficiency. However, in actual applications, the token is often not available during the first request, and the second request is normal.
Code examples and problem analysis
The following code snippet shows common errors:
<?php session_start();
// ...Other codes are omitted...
if (!empty($_SESSION['access_token']) && $_SESSION['expire_time'] > time()) {
// Use cached access_token
// ...
} else {
// Get access_token
$app_id = 'xxx';
$app_secret = 'xxx';
$token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$app_id}&secret={$app_secret}";
// ... Get token logic...
$_SESSION['access_token'] = $access_token;
$_SESSION['expire_time'] = time() 120; // Excessive validity return $_SESSION['access_token'];
}
The problem is:
- Session is not an ideal access_token cache solution: access_token is valid for 7200 seconds, but only 120 seconds are set in the code, and each user caches it separately, which is inefficient.
- Logical defect: During the first request,
$_SESSION['access_token']is empty, and you go directly toelseblock to get the token, but only the token is returned after obtaining it, and no subsequent business logic is executed.
Solution
- Adopt a more appropriate caching mechanism: use distributed caches such as file cache or Redis, and all users share the same access_token to avoid repeated requests.
- Improve cache update logic: File cache can be used in
cache_time access_tokenformat, updated every 7000 seconds, and use file locks (flock) to prevent concurrent conflicts. Shared locks (LOCK_SH) are used for reading, and exclusive locks (LOCK_EX) are used for writing. - Timing Tasks: Use timing tasks (such as crontab) to automatically update access_token every 7000 seconds to ensure that the cache is always valid.
- Large project recommendations: For high concurrency scenarios, Redis or Memcached is the better choice, and its performance far exceeds file cache.
Best Practices
It is recommended to use timed tasks to regularly update access_token, and combine high-performance cache systems such as Redis or Memcached to achieve efficient and stable access_token management. Avoid using Session to cache access_token directly.
Summarize
By improving the caching mechanism and logic, it can effectively solve the problem of using Session to cache WeChat access_token in PHP, resulting in the first request being empty, and improve application performance and stability.
The above is the detailed content of In PHP, how to solve the problem that the first request is empty when using session to cache WeChat access_token?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Java Chinese garbled problem, cause and fix for garbled code
May 28, 2025 pm 05:36 PM
The garbled problem in Java Chinese is mainly caused by inconsistent character encoding. The repair method includes ensuring the consistency of the system encoding and correctly handling encoding conversion. 1.Use UTF-8 encoding uniformly from files to databases and programs. 2. Clearly specify the encoding when reading the file, such as using BufferedReader and InputStreamReader. 3. Set the database character set, such as MySQL using the ALTERDATABASE statement. 4. Set Content-Type to text/html;charset=UTF-8 in HTTP requests and responses. 5. Pay attention to encoding consistency, conversion and debugging skills to ensure the correct processing of data.
blockdag (bdag): The remaining 7 days, the remaining stack before going online
May 26, 2025 pm 11:51 PM
For good reason, Blockdag focuses on buyer interests. Blockdag has raised an astonishing $265 million in 28 batches of its pre-sales As 2025 approaches, investors are steadily accumulating high-potential crypto projects. Whether it’s low-cost pre-sale coins that offer a lot of upside, or a blue chip network that prepares for critical upgrades, this moment provides a unique entry point. From fast scalability to flexible modular blockchain architecture, these four outstanding names have attracted attention throughout the market. Analysts and early adopters are watching closely, calling them the best crypto coins to buy short-term gains and long-term value now. 1. BlockDag (BDAG): 7 days left
How to limit user resources in Linux? How to configure ulimit?
May 29, 2025 pm 11:09 PM
Linux system restricts user resources through the ulimit command to prevent excessive use of resources. 1.ulimit is a built-in shell command that can limit the number of file descriptors (-n), memory size (-v), thread count (-u), etc., which are divided into soft limit (current effective value) and hard limit (maximum upper limit). 2. Use the ulimit command directly for temporary modification, such as ulimit-n2048, but it is only valid for the current session. 3. For permanent effect, you need to modify /etc/security/limits.conf and PAM configuration files, and add sessionrequiredpam_limits.so. 4. The systemd service needs to set Lim in the unit file
Performance Tuning of Jenkins Deployment on Debian
May 28, 2025 pm 04:51 PM
Deploying and tuning Jenkins on Debian is a process involving multiple steps, including installation, configuration, plug-in management, and performance optimization. Here is a detailed guide to help you achieve efficient Jenkins deployment. Installing Jenkins First, make sure your system has a Java environment installed. Jenkins requires a Java runtime environment (JRE) to run properly. sudoaptupdatesudoaptininstallopenjdk-11-jdk Verify that Java installation is successful: java-version Next, add J
How to implement automated deployment of Docker on Debian
May 28, 2025 pm 04:33 PM
Implementing Docker's automated deployment on Debian system can be done in a variety of ways. Here are the detailed steps guide: 1. Install Docker First, make sure your Debian system remains up to date: sudoaptupdatesudoaptupgrade-y Next, install the necessary software packages to support APT access to the repository via HTTPS: sudoaptinstallapt-transport-httpsca-certificatecurlsoftware-properties-common-y Import the official GPG key of Docker: curl-
Copy comics (official website entrance)_Copy comics (nba) genuine online reading portal
Jun 05, 2025 pm 04:12 PM
Copying comics is undoubtedly a treasure that cannot be missed. Here you can find basketball comics in various styles, from passionate and inspiring competitive stories to relaxed and humorous daily comedy. Whether you want to relive the classics or discover new works, copying comics can meet your needs. Through the authentic online reading portal provided by copy comics, you will bid farewell to the trouble of pirated resources, enjoy a high-definition and smooth reading experience, and can support your favorite comic authors and contribute to the development of authentic comics.
What is Middleware in Laravel? How to use it?
May 29, 2025 pm 09:27 PM
Middleware is a filtering mechanism in Laravel that is used to intercept and process HTTP requests. Use steps: 1. Create middleware: Use the command "phpartisanmake:middlewareCheckRole". 2. Define processing logic: Write specific logic in the generated file. 3. Register middleware: Add middleware in Kernel.php. 4. Use middleware: Apply middleware in routing definition.
Top 10 AI writing software rankings Recommended Which AI writing software is free
Jun 04, 2025 pm 03:27 PM
Combining the latest industry trends and multi-dimensional evaluation data in 2025, the following are the top ten comprehensive AI writing software recommendations, covering mainstream scenarios such as general creation, academic research, and commercial marketing, while taking into account Chinese optimization and localization services:
