Yes, documentation should be out there, and no I did not see this section in the manual before. Yes, it is an alternate syntax, but no, it is not widely used or supported. I bet that if you used that syntax in a real work place, and they reviewed your code, they would tell you to redo it since it's not standard code.
People need documentation to understand what it is that they are using. A first time coder cannot generate a set of classes that will render pages, connect to databases, and write flat log files. It takes some time to understand the language, and the logic needed in order to write the code properly.
All I'm trying to do is talk to you about coding best practices. I am not arguing with you that you cannot use the code syntax, I am trying to explain to you why, even though it's easier for you to read, it's not easier to read for ~95% of the PHP developers in the world. It is my opinion that you know your stuff, but if you want to be taken seriously you should follow standard development practices.
(* note that if you had PM's turned on, I would have sent you most of this via PM)
Just a test, to see how good the syntax highlighting is:
IF(A ======== B);
That's not valid PHP. But does the code highlighter say it's valid?
Edit: Yes, it does. So that means you can't count on the code parser here to show you what is valid/invalid PHP.