How do I easily manage my PHP version?
Our website runs via WordPress, and now requires PHP 5.6 or higher. What is the easiest/safest way to manage PHP releases?
PHP has great documentation outlining how to migrate from one PHP version to a newer version. You can find all of these docs on their site: http://php.net/manual/en/migration5.php
You could also use a 3rd party tool to help manage your PHP version. An example of this would be Phpbrew which allows you to switch versions easily, build with different variants, and compile with various modules.