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Cached Dynamic Modules

by: JP
July 30, 2000

In this article I will show how to use a modular system to create a website that is constructed on the fly using dynamic modules, which for performance sake can be cached if you want. Each module is a php script on its own, returning html data to be included in the final html page.


  • php scripted modules that implement functionality (e.g. a style definition, menu or discussion board)
  • a parser that can construct the html page by reading input files, determining which modules to call and then combine output of the modules
  • files with specific extension (say .my) that specifiy html + calling tags for each module


To demonstrate how it works, let's see a file called

<title>Hello world</title>
<my-style name=test>
hello world
If a request is being made for, the webserver redirects this request to the php parser, which just scans for <my- .. > tags. It finds the 'style' tag, and looks for the module style.php in its module directory.
The file style.php is included and the function handle_style ($arglist) is called, where $arglist is an associative array of all specified parameters to the tag (here:
<?php $arglist[name] = "test"?>
The handle_style function must return a string containing html. How the module determines the html doesn't concern the system. Say, the handle_style module returns <font face=Arial size=2 color=yellow> and the parser includes this in the final html.

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