To determine which version of PHP is running on your site:
If the PHP version on your site does not meet the required minimum you should strongly consider updating your PHP.
PHP is the coding language that SC Commerce runs on and is set on a server level by your hosting company. You can typically control this within your hosting panel.
The latest version of PHP has been developed to be more efficient than former versions of PHP, so updating can make your SC Commerce store run faster.
PHP is the world’s most popular web programming language and is a target for hackers. Running the latest version of PHP ensures that loopholes in older versions cannot be exploited because the team is consistently making improvements.