Attempted to install php again...
Now I'm getting the following errors:
apxs:Error: Invalid query string `APU_BINDIR'.
apxs:Error: Invalid query string `APR_BINDIR'.
./configure: line 1: /apr-config: No such file or directory
./configure: line 1: /apu-config: No such file or directory
configure: error: Please note that Apache version >= 2.0.44 is required.
According to the info on php.net, the 4.3.10 version is supposed to be compatible with Apache version 4.2.0 and later (hxxp:us2.php.net/manual/en/install.unix.apache2.php
[nonactive]). Since we're running version 4.2.2, I thought we'd be okay

I'm not sure I feel comfortable upgrading Apache...
Any help or insight?
By the way, I did a locate on 'apr' and 'apu', I found apu.h under /usr/include/httpd/ as well as apr.h (same directory)