How To Install PHP 7.0
January 4, 2018
http://askubuntu.com/questions/705880/how-to-install-php-7
also for error “ZipArchive Library is missing or disabled”:
https://www.digitalocean.com/community/questions/php-7-0-ziparchive-library-is-missing-or-disabled
sudo apt-get install php7.0-cli php7.0-common libapache2-mod-php7.0 php7.0 php7.0-mysql php7.0-fpm php7.0-curl php7.0-gd php7.0-bz2 php7.0-zip
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