ThinkPHP6安裝

使用國內鏡像：https://docs.phpcomposer.com/

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

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

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

然後安裝

composer create-project topthink/think tp