I have a RHEL box running PHP 5.3.3, which was installed using the binary packages provided by yum. I have installed the php-pdo package:

# yum info php-pdo
Loaded plugins: product-id, rhnplugin, subscription-manager
Updating Red Hat repositories.
Installed Packages
Name        : php-pdo
Arch        : x86_64
Version     : 5.3.3
Release     : 3.el6_1.3
Size        : 168 k
Repo        : installed
From repo   : rhel-x86_64-server-6
Summary     : A database access abstraction module for PHP applications
URL         : http://www.php.net/
License     : PHP
Description : The php-pdo package contains a dynamic shared object that will add
            : a database access abstraction layer to PHP.  This module provides
            : a common interface for accessing MySQL, PostgreSQL or other
            : databases.

It appears to be working correctly for SQLite databases, but not MySQL. There's no file including pdo_mysql.so in /etc/php.d, and there is no copy of pdo_mysql.so in /usr/lib64/php/modules.

I'm pretty sure I just need the driver file and a line in the PHP configuration. A yum search pdo mysql didn't turn up any useful packages, and Google has failed me. If I were on Ubuntu or Debian, I'd apt-get install php5-mysql and be done with it.

So ... where in Red Hat land do I get a copy of pdo_mysql.so, and install it properly?