Composer 安装 laravel5.8
使用阿里云源
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
问题1：
安装laravel5.8
composer create-project --prefer-dist laravel/laravel blog "5.8.*"
此时一直执行卡住不动：
Updating dependencies (including require-dev)
执行 composer diagnose 命令查看排查问题
最后 升级composer
composer self-update
E:\PHPStudy8.1\WWW\www.larstu.com>composer self-update Updating to version 2.1.11 (stable channel). Downloading (100%) Use composer self-update --rollback to return to version 1.8.5
最后在安装laravel5.8即可
E:\PHPStudy8.1\WWW\www.larstu.com>composer create-project laravel/laravel=5.8.* laravel --prefer-dist
Creating a "laravel/laravel=5.8.*" project at "./laravel"
Installing laravel/laravel (v5.8.35)
- Installing laravel/laravel (v5.8.35): Extracting archive
Created project in E:\PHPStudy8.1\WWW\www.larstu.com\laravel
> @php -r "file_exists('.env') || copy('.env.example', '.env');"
Loading composer repositories with package information
Updating dependencies
Lock file operations: 86 installs, 0 updates, 0 removals
- Locking beyondcode/laravel-dump-server (1.3.0)
- Locking dnoegel/php-xdg-base-dir (v0.1.1)
- Locking doctrine/inflector (1.4.4)
- Locking doctrine/instantiator (1.4.0)
Discovered Package: beyondcode/laravel-dump-server
Discovered Package: fideloper/proxy
Discovered Package: laravel/tinker
Discovered Package: nesbot/carbon
Discovered Package: nunomaduro/collision
Package manifest generated successfully.
55 packages you are using are looking for funding.
Use the `composer fund` command to find out more!
> @php artisan key:generate --ansi
Application key set successfully.问题2：
Fatal error: Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 7.4.0". You are running 7.3.29-1+ubuntu20.04.1+deb.sury.org+1. in /home/vagrant/code/xxx/vendor/composer/platform_check.php on line 24
这个就是，本地环境是 7.3.29，但是有些 composer 组件要求是大于7.4 的php 版本
解决：
删除了 vendor 文件夹，然后执行了以下指令，就可以了
composer install --ignore-platform-reqs
问题3：
Fatal error: Declaration of Illuminate\Container\Container::get($id) must be compatible with Psr\Con
解决：php版本大于php7.3即可