PHP 7.0.32-3+ubuntu14.04.1+deb.sury.org+1 (cli) (built: Oct 25 2018 07:05:57) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
with Zend OPcache v7.0.32-3+ubuntu14.04.1+deb.sury.org+1, Copyright (c) 1999-2017, by Zend Technologies
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
(optional) sudo apt-get remove php7.0
sudo apt-get install php7.1 (from comments)
sudo apt-get upgrade
sudo update-alternatives --set php /usr/bin/php7.2
sudo update-alternatives --set phar /usr/bin/phar7.2
sudo update-alternatives --set phar.phar /usr/bin/phar.phar7.2
sudo update-alternatives --set phpize /usr/bin/phpize7.2
sudo update-alternatives --set php-config /usr/bin/php-config7.2
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