Also, on the same page there is mysqli_get_client_stats which I believe should be 
mysqli::get_client_stats.

This bug has been fixed in the documentation's XML sources. Since the
online and downloadable versions of the documentation need some time
to get updated, we would like to ask you to be a bit patient.

Thank you for the report, and for helping us make our documentation better.

The mysqli_get_client_stats() function is not actually exposed to the MySQLi 
class. So calling mysqli::get_client_stats() will cause a fatal error of "Call to 
undefined method". It is only available as the function mysqli_get_client_stats() 
and properly documented as such.

However, I did fix the mix up between the descriptions of the other two 
methods/strings mysqli::get_client_info(), mysqli::get_client_version(), 
mysqli::$client_info, and mysqli::$client_version respectively.