Question

Shortened Aim: To pass a variable via $.POST to a PHP file (get.php), and for get.php to $.POST the variable again to db.php.

My Problem

I’m trying to follow the model-view-controller design pattern within my PHP code.

I’ll have three pages:

1. index.php – The GUI (basically HTML and DIV tags)
2. get.php – The hidden php which serves code via AJAX + POST to divs in index.php
3. db.php – The database connection part

Basically, I want to receive a response through two POST requests

So far I have index.php POSTING to get.php and requesting certain data, which is returned via and updated via AJAX and jQuery for animation.

Here’s a code snippet:

function get(div,id,opt_username) { 
$.post('get.php', { request: id },
function(response) {
    // In this order, first fadeout div
    $(div).fadeOut(600, function() {

        // If we pass a username as optional parameter...
        if (opt_username) { 
            //Prepend username onto response
            response = "     Welcome " + username + response;   
        }

        // Then get the response back HIDDEN
        $(div).html(response).hide(function() {
                // Once completed, parse with XFBML so everything renders
                FB.XFBML.parse(document.getElementById(div));
                // Only after everything's parsed do we fade back in
                $(div).fadeIn(1100, function() {}); 

        });
    });
});
};  

Now I can do POST requests to get.php, but if I try and do the same thing within get.php to post to db.php (to perform database operations) this just does not seem to work.

My Aim

index.php -> request data -> get.php -> request db connection -> db.php -> return data -> get.php -> return data -> index.php

This will allow me to switch the database layer out with another one. For example I’m currently using RDBMS but I would like to switch to XML / RDFXML in the future, meaning all I have to do is switch out the db.php for another one and everything will still work, keeping in-line with the MVC.

My Questions

1. First and foremost, can I actually make a POST to a page to make another POST and if so, why am I getting the error below?
2. Am I going about the Model View Controller approach the correct way

Further Explanation

Here is a code snippet in get.php (the second page) which throws an error:

$.post('db.php', { test: 2 },
    function(response) {} );

Error thrown:

Parse error: syntax error, unexpected '.', expecting T_VARIABLE or '$' 

Conclusion

I simply can’t get index.php to post to get.php, in turn posting to db.php.

Answer 1

Implementing model-view-controller does not mean you have to create HTTP requests to communicate between these layers. Simply include the file using include or require. The seperation already exists by having different files.