ThinkPHP6安装

使用国内镜像：https://docs.phpcomposer.com/

composer config -g repo.packagist composer https://packagist.phpcomposer.com

Linux下出现错误：
- topthink/framework v6.0.2 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.

安装：
sudo apt-get install php7.4-mbstring

然后安装

composer create-project topthink/think tp