Hello,
I’m sorry that you experienced this, but this error means that your website hosting company is using an unsupported (outdated) version of PHP. This error will only happen with PHP version 5.3 or older. That has reached official “end of life” over 2 years ago. Running your website with that old version of PHP “may expose your site to security vulnerabilities” (see WordPress Requirements).
WordPress recommends using at least PHP 5.6. Although, ZodiacPress supports as old as PHP version 5.4.
If all of this PHP version stuff sounds like “mumbo jumbo,” please, just ask your web hosting company why they are running an outdated and vulnerable version of PHP, and if they could please update the PHP version. Actually, most web hosting companies should have this option available for you to update on your own. Log in to your web hosting account and have a look around. Look for your PHP version and you may find an easy way to update it. If you want me to look into it, please tell me what web hosting company you use.