[CentOS] php rpm centos4.4

Hi

i need to install php when i download and install the cacti it say that and i
can not find any pure php rpm but it is an php-excel and so on, what php should
i use ?

the yum command do noit find any php to update since i have php installed than
it complains that it needs php-pear and i am in the same situation and i have
several to choose among ..., php-ldap is missing ...


Matthias Nilsson
U.D.COMM.