PHP语法[''xyz'']？

Question

On http://docs.joomla.org/Supporting_SEF_URLs_in_your_component and other joomla docs there's often a syntax like:

function [''Componentname'']ParseRoute($segments){
  ...
}

I've never seen the [''Componentname''] syntax, and didn't find it on php.net too.

Is this even PHP (instead of being some weird placeholder convention on joomla.org), if yes, how does it work?

EDIT: it looks like some sort of Macro, but afaik PHP doesn't do any preprocessing

Answer 1

This is not real php code, just showed as an example.

The [Componentname] in [Componentname]ParseRoute is just the placeholder, means that you should have such function like below:

// where foo is the name for your component
function fooParseRoute($segments){

}