[CentOS] php mysql pronblem with server

Hi,

I have a problem installing a minimal server configuration, with php and
mysql. 
Seems like no matter what I try I never get a /usr/lib/php4/mysql.so.
/usr/lib/php4 only has;
ldap.so

I installed on a workstation with "Everything" and I see /usr/lib/php4/
as; domxml.so  gd.so  imap.so  ldap.so  mbstring.so  mysql.so
ncurses.so  odbc.so  pgsql.so  snmp.so  xmlrpc.so

TIA
Gerald