答案是设置本地服务器、使用php内置服务器或部署到网络主机。首先安装XAMPP并启动apache，将PHP文件放入htdocs目录，通过http://localhost/your-file.php访问；其次可用PHP内置服务器，在命令行运行php -S localhost:8000后访问http://localhost:8000；最后可将文件上传至支持PHP的主机的public_html目录，通过域名加路径在线访问。

To run a PHP file and access it through a website, you need to set up a proper environment where the PHP code can be executed by a web server. Here are the methods to achieve this:

The operating environment of this tutorial: Dell XPS 13, windows 11

1. Set Up a Local Development Server using XAMPP

This method involves installing a local server package that includes Apache, mysql, and PHP. XAMPP is one of the most popular tools for running PHP files locally.

• Download XAMPP from the official Apache Friends website and install it on your system.
• Launch the XAMPP Control Panel and start the Apache module.
• Place your PHP file inside the htdocs folder located in the XAMPP installation Directory (e.g., C:xampphtdocs).
• Open a web browser and navigate to http://localhost/your-file.php, replacing “your-file.php” with the actual filename.

2. Use Built-in PHP Development Server

PHP comes with a built-in development server that allows you to run PHP scripts without installing a full web server stack. This is ideal for testing and development purposes.

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• Open a command-line Interface (CLI) such as Command prompt or PowerShell.
• Navigate to the directory containing your PHP file using the cd command.
• Run the command php -S localhost:8000 to start the server on port 8000.
• access your file by visiting http://localhost:8000 in your browser.

3. Deploy PHP File on a Web Hosting Service

if you want your PHP website to be accessible online, upload your PHP files to a web hosting provider that supports PHP and MySQL.

• Choose a hosting service that supports PHP (most shared hosts do).
• Use an FTP client like FileZilla or the host’s file manager to upload your PHP file to the public_html or www directory.
• Ensure file permissions are correctly set (usually 644 for PHP files).
• Visit your domain followed by the filename, such as https://yourdomain.com/your-file.php.