Question

If I can explicitly declare the type of a member var (esp. other class as a member), them my IDE( such as Dreamweaver) can know the member’s member.

class PHPClass(){
    OtherClass $member_var;
}

Answer 1

The only way is to use documentation like so:

class MyClass {

    /**
     * @var OtherClass This is my other class
     */
    private $other;

}