Is html / css programming languages?
Controversial. I admit that they can be called programming languages, however, they are not fully them.
Initially, html was exactly the markup language, however, as it developed, in combination with css it has more and more features. Including, you can create interactive pages completely without the use of scripts.
As for declarativeness, it cannot be opposed to the concept of a programming language. For example, the prologue is declarative.
Dancing Bender on CSS3 and demo .
When we typeset the site in html and css, then it can be called programming?
Probably yes.
Although, there are two options. Either the designer or the developer. In the first case, I mean the creation of a purely visual design, without a complete understanding of html and css. Although most designers still understand this. There is rather a difference in purpose - to create a design and create a working site. The second is programming, but the first is not.
Is it possible to call those who program in PHP scripters? Or who are these scriptlers?
For the first time I meet the concept of "script". It seems that these are those who write auxiliary scripts. Then no. Php is exactly programming. Although, if there are any minor additions to the CMS, then, with some stretch, you can.
In general, it seems to me that this name should be avoided, since in the case of normal development (and even mediocre development) it has a negative connotation. At least I get the impression from him.