lI tried to instal some of the missing modules and got this
[root@server ~]# yum install php-gd
Loaded plugins: fastestmirror, presto, priorities, protectbase, replace
Setting up Install Process
Loading mirror speeds from cached hostfile
* base: ftp.osuosl.org
* extras: mirror.keystealth.org
* mratwork-epel: mirrors.cat.pdx.edu
* mratwork-ius-archive: mirrors.kernel.org
* mratwork-ius-stable: mirrors.kernel.org
* mratwork-release-neutral-noarch: rpms.printographic.com
* mratwork-release-version-arch: rpms.printographic.com
* mratwork-webtatic: us-east.repo.webtatic.com
* updates: mirror.keystealth.org
0 packages excluded due to repository protections
Resolving Dependencies
--> Running transaction check
---> Package php-gd.i686 0:5.3.3-49.el6 will be installed
--> Processing Dependency: php-common(x86-32) = 5.3.3-49.el6 for package: php-gd-5.3.3-49.el6.i686
--> Running transaction check
---> Package php-common.i686 0:5.3.3-49.el6 will be installed
--> Processing Conflict: php56u-common-5.6.31-1.ius.centos6.i686 conflicts php-common < 5.6
--> Processing Conflict: php56u-gd-5.6.31-1.ius.centos6.i686 conflicts php-gd < 5.6
--> Processing Conflict: php56u-gmp-5.6.31-1.ius.centos6.i686 conflicts php-gmp < 5.6
--> Finished Dependency Resolution
Error: php56u-gmp conflicts with php-common-5.3.3-49.el6.i686
Error: php56u-common conflicts with php-common-5.3.3-49.el6.i686
Error: php56u-gd conflicts with php-gd-5.3.3-49.el6.i686
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
[root@server ~]#