code on RaspBerryPI

1. install php

sudo apt install -y -t buster php7.3-fpm php7.3-curl php7.3-gd php7.3-intl php7.3-mbstring php7.3-mysql php7.3-imap php7.3-opcache php7.3-sqlite3 php7.3-xml php7.3-xmlrpc php7.3-zip

remeber run this:

sudo apt-get update

安装 mysql server

$ sudo apt-get update

$ sudo apt-get install mariadb-server

https://blog.csdn.net/armcsdn/article/details/100481814

netstat -anpt