Unixcop published a tutorial about how to setup LAMP in Slackware Linux 15.0.
Setup Lamp in Slackware 15.0
So Slackware is already in release candidate available, this release is coming with many changes on the core and on the packages, we will explain to you to Setup LAMP stack Slackware 15.0 Server.
Setup Lamp in Slackware 15.0 - Unixcop