You can also run `php –ini` inside terminal to see which files are used by PHP in CLI mode怎么解决

You can also run `php –ini` inside terminal to see which files are used by PHP in CLI mode怎么解决

Laravel 项目安装验证码 mews/captcha 扩展，出现如下错误信息：

composer require mews/captcha

Using version ^2.2 for mews/captcha

./composer.json has been updated

Loading composer repositories with package information

Updating dependencies (including require-dev)

Your requirements could not be resolved to an installable set of packages.

Problem 1

– mews/captcha 2.2.0 requires intervention/image ~2.2 -> satisfiable by intervention/image[2.2.0, 2.2.1, 2.2.2, 2.3.0, 2.3.1, 2.3.10, 2.3.11, 2.3.12, 2.3.13, 2.3.14, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 2.3.6

, 2.3.7, 2.3.8, 2.3.9, 2.4.0, 2.4.1, 2.4.2, 2.4.x-dev].

……….

– intervention/image 2.2.1 requires ext-fileinfo * -> the requested PHP extension fileinfo is missing from your system.

– intervention/image 2.2.0 requires ext-fileinfo * -> the requested PHP extension fileinfo is missing from your system.

– Installation request for mews/captcha ^2.2 -> satisfiable by mews/captcha[2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.2.4].

To enable extensions, verify that they are enabled in your .ini files:

– D:\phpStudy\PHPTutorial\php\php-7.2.1-nts\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.

排查原因是php需要开启fileinfo扩展，

编辑php.ini文件，打开extension=php_fileinfo.dll 就可以了，重新运行composer命令，安装成功

composer require mews/captcha

Using version ^2.2 for mews/captcha

./composer.json has been updated

Loading composer repositories with package information

Updating dependencies (including require-dev)

Package operations: 2 installs, 0 updates, 0 removals

– Installing intervention/image (2.4.2): Downloading (100%)

– Installing mews/captcha (2.2.4): Downloading (100%)

intervention/image suggests installing ext-imagick (to use Imagick based image processing.)

intervention/image suggests installing intervention/imagecache (Caching extension for the Intervention Image library)

Writing lock file

Generating optimized autoload files

> Illuminate\Foundation\ComposerScripts::postAutoloadDump

> @php artisan package:discover –ansi

Discovered Package: beyondcode/laravel-dump-server

Discovered Package: fideloper/proxy

Discovered Package: intervention/image

Discovered Package: laravel/nexmo-notification-channel

Discovered Package: laravel/slack-notification-channel

Discovered Package: laravel/tinker

Discovered Package: mews/captcha

Discovered Package: nesbot/carbon

Discovered Package: nunomaduro/collision

Package manifest generated successfully.