安装最新laravel框架

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1	composer create-project laravel/laravel --prefer-dist laravel9

　　换源

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1	composer config -g repos.packagist composer https://mirrors.tencent.com/composer/

　　安装dcat-admin

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1	composer require dcat/laravel-admin:"2.*" -vvv

　　然后运行下面的命令来发布资源：

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1	php artisan admin:publish

　　运行如下命令完成安装：

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1	php artisan admin:install

　　

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1 2	use Illuminate\Support\Facades\Schema; Schema::defaultStringLength(191);