already installed
yum install php55u-mysql*
Loaded plugins: fastestmirror, priorities, protectbase, replace
Loading mirror speeds from cached hostfile
* base: centos.mirror.constant.com
* extras: centos.mirror.constant.com
* mratwork-epel: ftp.linux.ncsu.edu
* mratwork-ius: archive.linux.duke.edu
* updates: centos.mirror.constant.com
0 packages excluded due to repository protections
Setting up Install Process
Package php55u-mysqlnd-5.5.10-1.ius.el6.i686 already installed and latest version
Nothing to do