More operators

In addition to the "->" and "::" operators, the following probably need 
more documentation too. I will list them followed by a comment in a 
separate line for each; note that "{$" and "${" are two operators 
(experienced PHP programmers know that I am sure).

=>
described in Array Operators but not in the table at the top of that page

()
not mentioned in "Array Operators", but is an operator for arrays, correct?

()
type-casting; not described as an operator

()
precedence; described in "Operator Precedence" but "()" is not described 
as an operator or operators but probably should be

{$ and ${
undocumented, barely described and they need better names

...

called a token in "Function arguments" so it is not clear to me that it 
is an operator but "..." seems to have multiple uses, none adequately 
documented.


Note that also the "Assignment Operators" page has a note written 12 
years ago saying it "ought to have table of assignment operators".