Presale faq says mysqli is required

[Christopher2017]

what is mysqli I know mysql but not mysqli? And what webhost has mysqli?

 

[Paul B]

Most hosts should have MySQLi, if not they should be able to install it.

 

[EQnoble]

MySQLi is another api for accessing a mysql DB. I believe all php versions 5.X and up are served stock with MySQLi.