Apache and PHP are installed, just not activated.
In the terminal: (sudo) change two lines in /etc/httpd/httpd/conf
Uncomment the line #LoadModule php4_module libexec/httpd/libphp4.so
Do the same for #Add module mod_php4.c
Add in the mime types.
When you see the line AddType application/x-tar .tgz add these two below:
AddType application/x-httpd-php .php
AddType application/x-httpd-php-source .phps
Now save the file.