Hi - thanks so much for pointing me to http://packages.slackware.it
I will be visiting that site very often in the future!
I downloaded the php package from the site, then simply typed.
I then downloaded the apache package from the same location, and installed it the same way.
When i typed apachectl start, it puked with an error similar to the following.
cannot load /usr/libexec/apache/libphp4.so
I then went into /etc/apache/ and edited the mod_php.conf file
I simply changed the number 4 to the number 5 (in two places on the only line in the file)
It turns out that apache was trying to start with the old php4, which is not in the system anymore.