distr update remove php5.
wget http://repo.zabbix.com/zabbix/3.2/ubuntu/pool/main/z/zabbix-release/zabbix-release_3.2-1+xenial_all.deb dpkg -i zabbix-release_3.2-1+xenial_all.deb && apt-get update sudo apt-get install zabbix-server-pgsql zabbix-frontend-php zabbix-agent -y sudo a2enconf zabbix
vi /etc/php/7.0/apache2/php.ini
sudo service apache2 restart service zabbix-server restart
