javascript - 如何在服务端利用user-agent精准判断浏览器类型？
如果不能使用ua精确判断，请列出你的方案
回复内容：
如果不能使用ua精确判断，请列出你的方案
ua可以由用户在浏览器端改变，所以服务端获取的可能不准。
浏览器厂商为了获取更高的兼容性，可能将它的ua改成主流浏览器的ua，所以服务端获取的可能不准。
综上，用js对浏览器进行能力检测还是最稳定的。
比如 !!window.MozillaTool 返回true那应该是firefox了。
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
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
1386
52
Explain the match expression (PHP 8 ) and how it differs from switch.
Apr 06, 2025 am 12:03 AM
In PHP8, match expressions are a new control structure that returns different results based on the value of the expression. 1) It is similar to a switch statement, but returns a value instead of an execution statement block. 2) The match expression is strictly compared (===), which improves security. 3) It avoids possible break omissions in switch statements and enhances the simplicity and readability of the code.
What is Cross-Site Request Forgery (CSRF) and how do you implement CSRF protection in PHP?
Apr 07, 2025 am 12:02 AM
In PHP, you can effectively prevent CSRF attacks by using unpredictable tokens. Specific methods include: 1. Generate and embed CSRF tokens in the form; 2. Verify the validity of the token when processing the request.
Explain strict types (declare(strict_types=1);) in PHP.
Apr 07, 2025 am 12:05 AM
Strict types in PHP are enabled by adding declare(strict_types=1); at the top of the file. 1) It forces type checking of function parameters and return values to prevent implicit type conversion. 2) Using strict types can improve the reliability and predictability of the code, reduce bugs, and improve maintainability and readability.
How to correctly display the locally installed 'Jingnan Mai Round Body' on the web page?
Apr 05, 2025 pm 10:33 PM
Using locally installed font files in web pages Recently, I downloaded a free font from the internet and successfully installed it into my system. Now...
How to control the top and end of pages in browser printing settings through JavaScript or CSS?
Apr 05, 2025 pm 10:39 PM
How to use JavaScript or CSS to control the top and end of the page in the browser's printing settings. In the browser's printing settings, there is an option to control whether the display is...
How can you prevent a class from being extended or a method from being overridden in PHP? (final keyword)
Apr 08, 2025 am 12:03 AM
In PHP, the final keyword is used to prevent classes from being inherited and methods being overwritten. 1) When marking the class as final, the class cannot be inherited. 2) When marking the method as final, the method cannot be rewritten by the subclass. Using final keywords ensures the stability and security of your code.
What is a composer used for?
Apr 06, 2025 am 12:02 AM
Composer is a dependency management tool for PHP. The core steps of using Composer include: 1) Declare dependencies in composer.json, such as "stripe/stripe-php":"^7.0"; 2) Run composerinstall to download and configure dependencies; 3) Manage versions and autoloads through composer.lock and autoload.php. Composer simplifies dependency management and improves project efficiency and maintainability.
The Future of PHP: Adaptations and Innovations
Apr 11, 2025 am 12:01 AM
The future of PHP will be achieved by adapting to new technology trends and introducing innovative features: 1) Adapting to cloud computing, containerization and microservice architectures, supporting Docker and Kubernetes; 2) introducing JIT compilers and enumeration types to improve performance and data processing efficiency; 3) Continuously optimize performance and promote best practices.
