Magento system requirements
This page lists system requirements for the Magento application.
Magento 2.0.x
Magento 2.0.x technology stack requirements
Magento 2.1.x
Magento 2.1.x technology stack requirements
Major differences from 2.0.x
See the system requirements for the complete list of supported and compatible software.
PHP
Dropped support for PHP 5.5.x 2.1.2 and later: Added support for PHP 7.0.4 MySQL (2.1.2 and later): Compatible with MySQL 5.7 Added support for Elasticsearch 1.7 and 2.x (recommended)
If you get the Elasticsearch software from the Elasticsearch Linux repository, we support versions 2.x.
If you get the Elasticsearch software from their Elasticsearch-PHP repository, we support the 2.0 branch.
Source:
http://devdocs.magento.com/magento-system-requirements.html
