yum --enablerepo=webtatic list php55w-* (or if you are shooting at 5.4 replace php55w with php54w)
Will get a listing of all extensions available for 5.5.13 from webtatic
One you will see that is showing check is php55w-int.x86_64
To install via yum
yum --enablerepo=webtatic install php55w-int.x86_64
Ditto -soap, xmlrpc, etc.
After installing, apache *must be restarted*:
/sbin/service httpd restart
Check logs for apache:
tail -n 100 /var/log/httpd/error_log
Check what php version from command line:
php -v
Check to see if mods are loading:
php -m |more
For php settings:
cd /etc/
fgrep max_ php.ini
will show all variables in the ini file that contain 'max_'
post_max_size = 400M
upload_max_filesize = 400M
Both above must be set to allow uploads of max size 400M (as an example).
After changing php.ini, apache must be restarted.
To check: php -i | grep 'max_'
'spirit of sharing', Ken