Problem: php modules for mysql are not loaded.
           Solution: launch php from command line using php -h
           watch and note errors.  In our case these files need renaming from version 10 to version
           9.  See version 9 below.  NOTE links must also be changed.


           [root@hobbes lib]# ll libmy*
           lrwxrwxrwx    1 root     root           23 May  8 14:33 libmysqlclient.so ->
           libmysqlclient.so.9.0.0
           lrwxrwxrwx    1 root     root           23 May  8 14:33 libmysqlclient.so.9 ->
           libmysqlclient.so.9.0.0
           -rwxr-xr-x    1 root     root       217861 Mar 27 02:33 libmysqlclient.so.9.0.0
           lrwxrwxrwx    1 root     root           25 May  8 14:33 libmysqlclient_r.so ->
           libmysqlclient_r.so.9.0.0
           lrwxrwxrwx    1 root     root           25 May  8 14:32 libmysqlclient_r.so.9 ->
           libmysqlclient_r.so.9.0.0
           -rwxr-xr-x    1 root     root       217925 Mar 27 02:32 libmysqlclient_r.so.9.0.0


           If you can enter the command 
           #php -h
           with no errors then your mysql modules are probably loaded ok.