从昨天开始，当我通过以下方式创建 laravel 项目时
composer create-project --prefer-dist laravel/laravel project_name
我收到这些建议消息。这是正常现象还是我搞砸了什么？
我安装了 Xampp 和 PHP 7.0.1。将 wamp 中的 PHP 选项从 7.0.1 切换到 5.x.x（只有一个选项，不记得确切的一个），从那时起，无论我创建新项目还是通过 comopser require 命令添加包，我都会收到这些消息。我在 Wamp 中将 PHP 版本切换回 7.0.1。卸载了wamp，但消息仍然存在。卸载了 xamp，重新安装了它，但仍然收到这些消息。
symfony/var-dumper 建议安装 ext-intl （在时区转储中显示区域名称）
symfony/var-dumper 建议安装 ext-symfony_debug ()
symfony/routing 建议安装原则/注释（用于使用注释加载器）
symfony/routing 建议安装 symfony/config （用于使用一体式路由器或任何加载程序）
symfony/routing 建议安装 symfony/dependency-injection （用于从服务加载路由）
symfony/routing 建议安装 symfony/expression-language （用于使用表达式匹配）
和一个像这样的长列表
这个是正常的。有些包可能有建议，但它们对于您的 Laravel 应用程序来说不是必需的。这些包在某些情况下可能有用，但肯定不需要运行或创建 Laravel 应用程序，因此您可以安全地忽略这些消息。
我刚刚验证安装了 5.5 版本的框架，并收到以下建议列表：
symfony/var-dumper suggests installing ext-intl (To show region name in time zone dump)
symfony/var-dumper suggests installing ext-symfony_debug ()
symfony/routing suggests installing doctrine/annotations (For using the annotation loader)
symfony/routing suggests installing symfony/config (For using the all-in-one router or any loader)
symfony/routing suggests installing symfony/dependency-injection (For loading routes from a service)
symfony/routing suggests installing symfony/expression-language (For using expression matching)
symfony/routing suggests installing symfony/yaml (For using the YAML loader)
paragonie/random_compat suggests installing ext-libsodium (Provides a modern crypto API that can be used to generate random bytes.)
symfony/event-dispatcher suggests installing symfony/dependency-injection ()
symfony/http-kernel suggests installing symfony/browser-kit ()
symfony/http-kernel suggests installing symfony/config ()
symfony/http-kernel suggests installing symfony/dependency-injection ()
symfony/console suggests installing symfony/lock ()
egulias/email-validator suggests installing ext-intl (PHP Internationalization Libraries are required to use the SpoofChecking validation)
ramsey/uuid suggests installing ircmaxell/random-lib (Provides RandomLib for use with the RandomLibAdapter)
ramsey/uuid suggests installing ext-libsodium (Provides the PECL libsodium extension for use with the SodiumRandomGenerator)
ramsey/uuid suggests installing ext-uuid (Provides the PECL UUID extension for use with the PeclUuidTimeGenerator and PeclUuidRandomGenerator)
ramsey/uuid suggests installing moontoast/math (Provides support for converting UUID to 128-bit integer (in string form).)
ramsey/uuid suggests installing ramsey/uuid-doctrine (Allows the use of Ramsey\Uuid\Uuid as Doctrine field type.)
ramsey/uuid suggests installing ramsey/uuid-console (A console application for generating UUIDs with ramsey/uuid)
symfony/translation suggests installing symfony/config ()
symfony/translation suggests installing symfony/yaml ()
monolog/monolog suggests installing aws/aws-sdk-php (Allow sending log messages to AWS services like DynamoDB)
monolog/monolog suggests installing doctrine/couchdb (Allow sending log messages to a CouchDB server)
monolog/monolog suggests installing ext-amqp (Allow sending log messages to an AMQP server (1.0+ required))
monolog/monolog suggests installing ext-mongo (Allow sending log messages to a MongoDB server)
monolog/monolog suggests installing graylog2/gelf-php (Allow sending log messages to a GrayLog2 server)
monolog/monolog suggests installing mongodb/mongodb (Allow sending log messages to a MongoDB server via PHP Driver)
monolog/monolog suggests installing php-amqplib/php-amqplib (Allow sending log messages to an AMQP server using php-amqplib)
monolog/monolog suggests installing php-console/php-console (Allow sending log messages to Google Chrome)
monolog/monolog suggests installing rollbar/rollbar (Allow sending log messages to Rollbar)
monolog/monolog suggests installing ruflin/elastica (Allow sending log messages to an Elastic Search server)
monolog/monolog suggests installing sentry/sentry (Allow sending log messages to a Sentry server)
league/flysystem suggests installing league/flysystem-aws-s3-v2 (Allows you to use S3 storage with AWS SDK v2)
league/flysystem suggests installing league/flysystem-aws-s3-v3 (Allows you to use S3 storage with AWS SDK v3)
league/flysystem suggests installing league/flysystem-azure (Allows you to use Windows Azure Blob storage)
league/flysystem suggests installing league/flysystem-cached-adapter (Flysystem adapter decorator for metadata caching)
league/flysystem suggests installing league/flysystem-eventable-filesystem (Allows you to use EventableFilesystem)
league/flysystem suggests installing league/flysystem-rackspace (Allows you to use Rackspace Cloud Files)
league/flysystem suggests installing league/flysystem-sftp (Allows you to use SFTP server storage via phpseclib)
league/flysystem suggests installing league/flysystem-webdav (Allows you to use WebDAV storage)
league/flysystem suggests installing league/flysystem-ziparchive (Allows you to use ZipArchive adapter)
league/flysystem suggests installing spatie/flysystem-dropbox (Allows you to use Dropbox storage)
league/flysystem suggests installing srmklive/flysystem-dropbox-v2 (Allows you to use Dropbox storage for PHP 5 applications)
laravel/framework suggests installing aws/aws-sdk-php (Required to use the SQS queue driver and SES mail driver (~3.0).)
laravel/framework suggests installing doctrine/dbal (Required to rename columns and drop SQLite columns (~2.5).)
laravel/framework suggests installing ext-pcntl (Required to use all features of the queue worker.)
laravel/framework suggests installing ext-posix (Required to use all features of the queue worker.)
laravel/framework suggests installing guzzlehttp/guzzle (Required to use the Mailgun and Mandrill mail drivers and the ping methods on schedules (~6.0).)
laravel/framework suggests installing league/flysystem-aws-s3-v3 (Required to use the Flysystem S3 driver (~1.0).)
laravel/framework suggests installing league/flysystem-cached-adapter (Required to use Flysystem caching (~1.0).)
laravel/framework suggests installing league/flysystem-rackspace (Required to use the Flysystem Rackspace driver (~1.0).)
laravel/framework suggests installing nexmo/client (Required to use the Nexmo transport (~1.0).)
laravel/framework suggests installing pda/pheanstalk (Required to use the beanstalk queue driver (~3.0).)
laravel/framework suggests installing predis/predis (Required to use the redis cache and queue drivers (~1.0).)
laravel/framework suggests installing pusher/pusher-php-server (Required to use the Pusher broadcast driver (~3.0).)
laravel/framework suggests installing symfony/dom-crawler (Required to use most of the crawler integration testing tools (~3.3).)
laravel/framework suggests installing symfony/psr-http-message-bridge (Required to psr7 bridging features (~1.0).)
psy/psysh suggests installing ext-pcntl (Enabling the PCNTL extension makes PsySH a lot happier :))
psy/psysh suggests installing ext-posix (If you have PCNTL, you'll want the POSIX extension as well.)
psy/psysh suggests installing ext-pdo-sqlite (The doc command requires SQLite to work.)
psy/psysh suggests installing hoa/console (A pure PHP readline implementation. You'll want this if your PHP install doesn't already support readline or libedit.)
filp/whoops suggests installing whoops/soap (Formats errors as SOAP responses)
sebastian/global-state suggests installing ext-uopz (*)
phpunit/phpunit-mock-objects suggests installing ext-soap (*)
phpunit/php-code-coverage suggests installing ext-xdebug (^2.5.5)
phpunit/phpunit suggests installing phpunit/php-invoker (^1.1)
phpunit/phpunit suggests installing ext-xdebug (*)
并且这个安装没有问题。例如monolog/monolog建议安装ext-mongo但显然我不想要它，也不需要它，所以可以安全地忽略这个建议，对于所有其他建议也是如此。
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