php extensions

[Paul Smith]

Hello All

I could do with help installing php. After running the configure script, I
can't seem to find the extensions directory. I have read and re-read the
INSTALL file in the php distrib. I'd like to add extensions using the
extension = gd.so

Is it still necessary? If I run phpinfo() I don't see gd for instance.
php_Mapscript is there.
Where and how do I add extensions? Any help would be appreciated.

Paul
System

SUSE Linux Ent Server 9
Mapserver 4.4.1
php-4.3.10
gd-2.0.33
Apache 2.0.52