To install PHP 5.6 or to upgrade from PHP 5.5 on Ubuntu 14:
Enter the following commands in the order shown:
- apt-get -y update
- add-apt-repository ppa:ondrej/php
- apt-get -y install php5.6 php5.6-mcrypt php5.6-mbstring php5.6-curl php5.6-cli php5.6-mysql php5.6-gd php5.6-intl php5.6-xsl php5.6-zip
- apt-get -y update
Enter the following command to verify PHP 5.6 installed properly:
php -v
Following is a sample response that indicates PHP 5.6 is installed:
PHP 5.6.22-4+deb.sury.org~trusty+1 (cli)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies
原文：http://devdocs.magento.com/guides/v2.0/install-gde/prereq/php-ubuntu.html#php-56-on-ubuntu-14
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