服务器需要安装composer
拉取Laravel6最新版本框架：
composer create-project --prefer-dist laravel/laravel laravelframework "6.*"
3.更换阿里云镜像：
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
Laravel各版本下载：https://github.com/laravel/framework/releases
报错提示：
Problem 1
- laravel/framework[v6.20.26, ..., 6.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 ^6.20.26 -> satisfiable by laravel/framework[v6.20.26, v6.20.27, 6.x-dev].
To enable extensions, verify that they are enabled in your .ini files:
- /www/server/php/73/etc/php.ini
You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.
解决方法：安装PHP对应版本的infopath组件，宝塔进入组件安装即可。
