Setup

The plugin is implemented as a PHP extension. See
also the installation instructions to install the » PECL/mysqlnd_qc extension.

Compile or configure the PHP MySQL extension
(mysqli, PDO_MYSQL, mysql) that you plan to use with
support for the mysqlnd library. PECL/mysqlnd_qc is a plugin for the
mysqlnd library. To use the plugin with any of the existing PHP
MySQL extensions (APIs), the extension has to use the mysqlnd
library.

Then, load the extension into PHP and activate the
plugin in the PHP configuration file using the PHP configuration
directive named mysqlnd_qc.enable_qc.

mysqlnd_qc.enable_qc=1