Our WordPress platform has been specifically designed to offer the best security, performance and reliability for WordPress. As a result, we have specifically tuned firewall rules and layers of protection to help keep WordPress sites secure. As part of this protection, a small number of PHP functions have been disabled, as we've found that they're often used for malicious purposes. The following functions are disabled for security reasons: exec opcache_get_configuration opcache_get_status passthru parse_ini_file popen proc_open shell_exec show_source system In our experience, it's highly unlikely any of your plugins rely on any of the functions above. However, if you have a genuine use case for any of these functions, you can still host your WordPress site on our Linux platform.