Requirements

PHP 5.3.3 or later. It is recommended to
use PHP 5.4.0 or later to get access to the latest mysqlnd
features.

The mysqlnd_uh user handler plugin
supports all PHP applications and all available PHP MySQL
extensions (mysqli,
mysql, PDO_MYSQL). The PHP MySQL
extension must be configured to use mysqlnd in order to be able to use the
mysqlnd_uh plugin for mysqlnd.

The alpha versions makes use of some mysqli features. You must enable
mysqli to compile the
plugin. This requirement may be removed in the future. Note, that
this requirement does not restrict you to use the plugin only with
mysqli. You can use the plugin to monitor mysql,
mysqli and PDO_MYSQL.