设计模式的名称：将数据从一种语言转移到另一种语言

Question

I'm trying to determine the name of this pattern if it exists. Essentially taking data from one language and using it in another. ie PHP -> Javascript. I was thinking it may be delegation, but I've seen this done from time to time, and wanted to know if it was considered a pattern, or is is just a protocol.

Edit: This more clearly defines what I'm talking about. You're not just generating one code or the other, but using it to send values. And so I guess this could be defined as source preprocessing.

<?php $foo = $_POST[MY_VAR]; ?>
<script>
    $bar = <?php echo $foo; ?>
    alert($bar)
</script>

Answer 1

If what you wanted to know is about communication between processes , then see sockets, TCP, HTTP and related technologies and data exchange formats like XML, JSON and similar.

If what you want to know is how to use code written in one language in a program written in another language , like what .Net or various JVM languages do, then it is interoperability you are talking about. Just keep in mind that in both cases I mentioned, programs in both languages are compiled to a common language (MSIL and Java bytecode, respectively).

In any case, I don't know if this has a name, or even if it is considered a pattern.

EDIT:

Since you specifically mentioned PHP and JavaScript, it is possible that you meant using PHP to generate a JavaScript variable with a literal value, so that you could pass a value from PHP to JavaScript code. This could be called source preprocessing or maybe code generation .

Answer 2

In terms of the example you link to, that's not a design pattern or protocol and there's no interoperability between PHP and JavaScript whatsoever - the JavaScript interpreter isn't even running as far as PHP is concerned and vice-versa.

You're simply using PHP as a JavaScript code generator - nothing more, nothing less.

If you were using JavaScript to extract information in real-time (via "AJAX", etc.) then there would at least be some interaction between the two languages and you could (sort of) consider a data format like JSON (or indeed XML) to be a form of XDR . However, that's not the case in this instance.

Answer 3

I don't think it's a design pattern at all - well maybe in broader sense than the term is usually used. You basically have two applications talking to each other over HTTP protocol. Languages used are irrelevant.