Abstract
In the history of internet, technology of WWW application made the network communication from text only to the web pages that presented with text and pictures. By developed plug-in programs of browser, voice file, animated file, and video file can embedded in web page for multimedia application. One of these applications is e-learning. E-learning includes computer aided instruction and certification in the beginning, but now it becomes to online education and online certification by WWW technic. The two WWW applications has a problem: more online users use the system in the same time, the waiting time becomes longer, even server could be overloading and halted. In this thesis, we use these open source software: Apache web server with PHP module and MySQL database server. We tuned them and PHP web page code by their built-in functions and features for an online certification system, and make it run efficiently with better performance when more then one thousand users connected.