我如何构建/获取libphp5.so？

I am running SUSE from an Amazon image which came pre loaded with apache2 and PHP. I have got my website up and running with a test index.html file, which works. When I do a index.php test my browser tries to download the file. Now I think this is because PHP / Apache2 is not configured correctly.I am running SUSE from an Amazon image which ca