если вы установили мод userdir это исправление:
sudo a2enmod php7.0
sudo vim /etc/apach2/mods-enabled/php7.0.conf
и прокомментируйте эти строки
# Running PHP scripts in user directories is disabled by default
#
# To re-enable PHP in user directories comment the following lines
# (from <IfModule...> to </IfModule>.) Do NOT set it to On as it
# prevents.htaccess files from disabling it.
#<IfModule mod_userdir.c>
# <Directory /home/*/public_html>
# php_admin_flag engine Off
# </Directory>
#</IfModule>