apache and php module
this assumes mysql is already installed and running

1/ prepare your system

# groupadd httpd
# useradd -g httpd -d /usr/local/apache -s /bin/nologin -c "httpd server" httpd

2/ prepare your source

$ mkdir web
$ cd web
$ wget http://mirrors.ccs.neu.edu/Apache/dist/httpd/apache_1.3.22.tar.gz
$ wget "http://www.php.net/do_download.php?download_file=php-4.0.5.tar.gz&source_site=fr.php.net"
$ tar xzvf apache_1.3.22.tar.gz
$ tar xzvf php-4.0.5.tar.gz

3/ compile apache

$ cd apache_1.3.22
$ sh configure --prefix=/usr/local/apache --enable-module=so  --server-uid=httpd --server-gid=httpd
$ make
$ su
password:
# make install

4/ compile the php module

# exit
$ cd ../php-4.0.5
$ sh configure --prefix=/usr/local/php4 --with-apxs=/usr/local/apache/bin/apxs --with-mysql --enable-safe-mode
$ make
$ su
password:
# make install

5/ config httpd.conf

# vi /usr/local/apache/conf/httpd.conf
  ^^
or whatever editor you like

setup port 80 and not port 8080
find the DirectoryIndex and add index.php
-> "DirectoryIndex index.php index.html"

6/ start apache

# /usr/local/apache/bin/apachectl start