[Kungfu]

basically what it does is this. You have your php script and you would assign a variable as a template.

So you can do something like

$header = header_template
$content = Content_template

then at the end you could out your entire page.

print(entire_page_template)

in your entire page template you can pass those variables down, so your entire page template may just be

$header
$content
$footer

etc....

So when you see those variables in the templates they are being passed from the server in a php script.

Thats just a simple way of putting it.