ubuntu16.04 php7 to php5.6

转自: http://askubuntu.com/questions/756181/installing-php-5-6-on-xenial-16-04

List installed php packages with dpkg -l | grep php| awk '{print $2}' |tr "\n" " " then remove unneeded packages with sudo aptitude purge your_packages_here or if you want to directly remove them all use :

sudo aptitude purge `dpkg -l | grep php| awk '{print $2}' |tr "\n" " "`

Add the PPA

sudo add-apt-repository ppa:ondrej/php

Install your PHP Version

sudo apt-get updatesudo apt-get install php5.6

You can install php5.6 modules too for example

sudo apt-get install php5.6-mbstring php5.6-mcrypt php5.6-mysql php5.6-xml

Verify your version

sudo php -v