I've got the email below from my hosting provider "wpengine". Is it going to affect civicrm, does civicrm rely much on putenv?
On July 20, 2016, we will be hardening the PHP function putenv based on industry best practices for all PHP applications.
You are receiving this message because we have detected the use of putenv on your WordPress install(s) and plugins listed below:
How this affects you
After Wednesday, July 20, 2016, you will no longer be able to set system-level environment variables using putenv. Any environment variables you set with putenv will be available in your WordPress site's code as it normally would.