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Composer 已与 laravel 一起安装。但是，每个命令都会导致失败并显示以下错误消息。

$ composer require kreait/laravel-firebase
Using version ^3.1 for kreait/laravel-firebase
./composer.json has been updated
Running composer update kreait/laravel-firebase
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - laravel/framework[v8.54.0, ..., 8.x-dev] require league/flysystem ^1.1 -> satisfiable by league/flysystem[1.1.0, ..., 1.x-dev].
    - league/flysystem[1.1.0, ..., 1.x-dev] require ext-fileinfo * -> it is missing from your system. Install or enable PHP's fileinfo extension.
    - Root composer.json requires laravel/framework ^8.54 -> satisfiable by laravel/framework[v8.54.0, ..., 8.x-dev].

To enable extensions, verify that they are enabled in your .ini files:
    - C:\Program Files\iis express\PHP\v8.0\php.ini
You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

Installation failed, reverting ./composer.json to its original content.
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1 回答 1

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如果您在 Windows 上运行，则缺少扩展名fileinfo，您只需要找到php.ini并取消注释此行

extension=php_fileinfo.dl

如果您在基于 Linux 的环境上运行，则需要像这样安装它

sudo apt install php-fileinfo
于 2021-10-03T14:24:21.283 回答