keeping php updated to avoid security vulnerabilities

A huge number of websites are running on old out of date versions of PHP based servers.  

Running your site on old server software guarantees an increased risk of hack attacks due to your site being vulnerable to publicly known exploits.   

Keeping your website running on current supported server software may in turn require that the website itself is updated a little to make it run on the latest servers.    

I can assist you in undertaking any or all of the 3 steps to improved security and performance

1. the audit of your current setup
2. upgrading server software
3. testing and upgrading (if required) your website to ensure compatibility with the new software

Another reason to upgrade is speed!   PHP 7 has HUGE performacne gains over previous versions that are genuinly visible to the eye in terms of how fast your pages will load.  

Ref: https://kinsta.com/blog/php-versions/