If you followed our tutorial about how to import and setup Essential Grid and after you import the JSON file nothing is imported, most probably the problem is the old version of the PHP.
The Essential Grid import feature requires PHP version to be >= 5.4.
The solution is very simple: please contact your server provider and ask them if they can update your server to use PHP version 5.4 or later.
PHP 5.3 is more than 5 years old already. If your hosting provider doesn't want to update their PHP version or does not provide PHP >= 5.4, please do yourself a favor and change the hosting provider. We can recommend Bluehost, they are also officially recommended by WordPress.
PHP 5.4 has lots of improvements over the PHP 5.3, including speed, performance and stability. So there are really no good reasons you would stick with 5 years old technology.
On our demo servers we use PHP 5.6 and (cutting edge) HHVM by Facebook.