# yum install php-pecl-xdebug

# yum install php-pecl-xdebug
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * atomic: mir01.syntis.net
 * base: ftp.plusline.de
 * epel: mirrors.n-ix.net
 * extras: mirror.netcologne.de
 * rpmforge: mirror1.hs-esslingen.de
 * updates: mirror.optimate-server.de
CentALT                                                                                                |  951 B     00:00
atomic                                                                                                 | 1.9 kB     00:00
base                                                                                                   | 1.1 kB     00:00
epel                                                                                                   | 3.6 kB     00:00
extras                                                                                                 | 2.1 kB     00:00
rpmforge                                                                                               | 1.9 kB     00:00
updates                                                                                                | 1.9 kB     00:00
vz-base                                                                                                |  951 B     00:00
vz-updates                                                                                             |  951 B     00:00
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package php-pecl-xdebug.x86_64 0:2.1.2-1.el5 set to be updated
--> Processing Dependency: php(api) = 20041225 for package: php-pecl-xdebug
--> Processing Dependency: php(zend-abi) = 20060613 for package: php-pecl-xdebug
--> Running transaction check
---> Package php-common.i386 0:5.2.17-1.el5.art set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

==============================================================================================================================
 Package                          Arch                    Version                              Repository                Size
==============================================================================================================================
Installing:
 php-pecl-xdebug                  x86_64                  2.1.2-1.el5                          CentALT                  173 k
Installing for dependencies:
 php-common                       i386                    5.2.17-1.el5.art                     atomic                   279 k

Transaction Summary
==============================================================================================================================
Install       2 Package(s)
Upgrade       0 Package(s)

Total size: 453 k
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test


Transaction Check Error:
  package php-common-5.3.25-18.el5.art.x86_64 (which is newer than php-common-5.2.17-1.el5.art.i386) is already installed
  file /etc/php.ini from install of php-common-5.2.17-1.el5.art.i386 conflicts with file from package php-common-5.3.25-18.el5.art.x86_64

Error Summary
-------------