With the development of the Internet, data exchange and communication are required between servers around the world. In order to ensure the accuracy of data, each server needs to set the correct time zone. When developing with PHP, it is important to set the time zone correctly. Therefore, this article will introduce how to set the Chengdu time zone in PHP.
1. What is a time zone?
Time zone refers to the way time is measured in various areas on the earth, also known as "local time". Since the Earth is a sphere, its rotation is irregular, so it has different local times at different longitudes.
2. How to set the time zone in PHP
1. Use the date_default_timezone_set() function to set the time zone
PHP 5.1.0 and above supports the date_default_timezone_set() function, you can use this Function sets the time zone in the script.
The following is a simple example:
date_default_timezone_set('Asia/Chongqing'); echo date('Y-m-d H:i:s');
Here, set the time zone to "Asia/Chongqing" (the time zone where Chengdu is located), and then use the date() function to obtain the current time and output it. The output should be a string representation of the current time.
2. Modify the php.ini file to set the time zone
php.ini is the PHP configuration file, and you can set the time zone by modifying the file. You need to find the "[Date]" part and enter in the following line:
date.timezone = Asia/Chongqing
After restarting the Apache server, you can make PHP use the "Asia/Chongqing" time zone in all scripts.
3. Use the ini_set() function to set the time zone
ini_set() is a function of PHP that can temporarily modify the PHP configuration at runtime. The following is an example of setting the time zone:
ini_set('date.timezone', 'Asia/Chongqing'); echo date('Y-m-d H:i:s');
Here, set the time zone to "Asia/Chongqing", and then use the date() function to obtain the current time and output it. The output should be a string representation of the current time.
3. Chengdu Time Zone
There are 24 time zones in the world, ranging from east to west according to longitude. China's time zone has only one "Beijing time", which is in the UTC 8 time zone and applies to the entire mainland of China.
Chengdu is a southwest border city in China, located at 104.06°E longitude in China. Many novice developers may think that Chengdu belongs to the UTC 7 time zone because the time difference between Chengdu and Bangkok is one hour. But in fact, Chengdu is still in the UTC 8 time zone. This is because the Chinese government decided to set the entire country to the same time zone to unify work schedules across the country.
4. Time zone naming rules
Time zone naming follows the "country/region" naming rules, such as "Asia/Shanghai", "Europe/Berlin", "America/New_York", etc. A complete list of time zones can be found in the official PHP documentation.
5. Summary
When developing PHP, it is very important to set the time zone correctly. PHP provides multiple ways to set the time zone, and you can choose according to your own needs. For Chengdu developers, it should be noted that Chengdu is still in the UTC 8 time zone, and the time zone needs to be set to "Asia/Chongqing" to accurately obtain the local time.
I hope this article can be helpful to beginners. Correctly setting the time zone will reduce a lot of unnecessary trouble during the development process.
The above is the detailed content of php Chengdu time zone setting. For more information, please follow other related articles on the PHP Chinese website!

This article explores efficient PHP array deduplication. It compares built-in functions like array_unique() with custom hashmap approaches, highlighting performance trade-offs based on array size and data type. The optimal method depends on profili

This article analyzes PHP array deduplication, highlighting performance bottlenecks of naive approaches (O(n²)). It explores efficient alternatives using array_unique() with custom functions, SplObjectStorage, and HashSet implementations, achieving

This article explores PHP array deduplication using key uniqueness. While not a direct duplicate removal method, leveraging key uniqueness allows for creating a new array with unique values by mapping values to keys, overwriting duplicates. This ap

This article details implementing message queues in PHP using RabbitMQ and Redis. It compares their architectures (AMQP vs. in-memory), features, and reliability mechanisms (confirmations, transactions, persistence). Best practices for design, error

This article examines current PHP coding standards and best practices, focusing on PSR recommendations (PSR-1, PSR-2, PSR-4, PSR-12). It emphasizes improving code readability and maintainability through consistent styling, meaningful naming, and eff

This article explores optimizing PHP array deduplication for large datasets. It examines techniques like array_unique(), array_flip(), SplObjectStorage, and pre-sorting, comparing their efficiency. For massive datasets, it suggests chunking, datab

This article details installing and troubleshooting PHP extensions, focusing on PECL. It covers installation steps (finding, downloading/compiling, enabling, restarting the server), troubleshooting techniques (checking logs, verifying installation,

This article explains PHP's Reflection API, enabling runtime inspection and manipulation of classes, methods, and properties. It details common use cases (documentation generation, ORMs, dependency injection) and cautions against performance overhea


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

WebStorm Mac version
Useful JavaScript development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

SublimeText3 Chinese version
Chinese version, very easy to use

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Dreamweaver Mac version
Visual web development tools
