ubuntu安装php5.6
添加PPA
sudo add-apt-repository ppa:ondrej/php
安装php5.6
sudo apt-get update
sudo apt-get install php5.6
安装扩展
sudo apt-get install php5.6-gd
sudo apt-get install php5.6-mysql
sudo apt-get install php5.6-fpm
sudo apt install apache2
sudo apt-get install libapache2-mod-php5.6