ubuntu 16.04 卸载php7.0 安装 php5.6

1.
sudo aptitude purge `dpkg -l | grep php| awk ‘{print $2}’ |tr “\n” ” “`

查询卸载已安装PHP

2.

sudo add-apt-repository ppa:ondrej/php

3.
sudo apt-get update
sudo apt-get install php5.6