VirtueShop has the following System Requirements:
You must ensure that you have MySQL, XML and Zlib-Support built into your PHP.
PHP should be compiled with support for https (openSSL) and cURL
PHP Safe Mode should be turned Off.
PHP Safe Mode feature has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 5.4.0
The browser needs to be capable of accepting Cookies and Cookies must be enabled.