Ubuntu Method for Completely Removing PHP 7.0

1. Delete php related packages and configurations

sudo apt-get autoremove php7*

2. Delete the association

sudo find /etc -name "*php*" |xargs rm -rf 

3. Clear the dept list

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

4. Check whether the uninstall is clean (if there is no return, the uninstall is complete)

 dpkg -l | grep php7.0

Summarize