Modular PHP worksheet issues

[JoseUusitalo]

A parameter can also be passed by reference which means that both parameters (actual and formal) are references to the same memory address and formal parameter can be thought as being an alias to the actual parameter.

I've never read about "actual" and "formal" parameters. What do those mean?

There's a typo in one of the file names: REST_Cient.php The file is correctly referred to in the PHP code.

Various wording issues throughout the worksheet and a few typos such as these two:

It is good to be able reed some data when doing these exercises. There are two small php-scrits --

The files api.php and REST_Cient.php are the same. I believe api.php is supposed to have the API implementation given in the worksheet instead of the client code?

[JoseUusitalo]

There's a typo in the word "construct".

    public function __contruct(name) { # constructor
        statements;
    }