composer 报错 - league/flysystem[1.1.0, ..., 1.x-dev] require ext-fileinfo * -> it is missing from your system. Install or enable PHP's fileinfo extension.

The error message suggests that the `fileinfo` extension for PHP is not installed or enabled on your system. The `league/flysystem` package requires this extension to function properly.

To resolve this issue, you need to install or enable the `fileinfo` extension for PHP. The steps to do this can vary depending on your operating system and PHP version.

Here are some general steps you can follow:

1. Check if the `fileinfo` extension is already installed on your system by running the following command in your terminal:

   php -m | grep fileinfo

If the output shows `fileinfo` in the list, it means the extension is installed and enabled.

2. If the `fileinfo` extension is not installed, you can try installing it using your system's package manager. For example, on Ubuntu, you can run the following command:

   sudo apt-get install php-fileinfo

On CentOS, you can run:

   sudo yum install php-fileinfo

Alternatively, you can install the extension using PECL by running:

   pecl install fileinfo

After installation, make sure to enable the extension in your `php.ini` configuration file by adding the following line:

   extension=fileinfo.so

3. Restart your web server or PHP-FPM process to apply the changes.

After completing these steps, try running the `composer require league/flysystem:^1.1` command again and see if the issue is resolved.