将现有PHP文件和函数包含在Slim结果中，传回空变量

I am beginning to use Slim for REST/Json web services. Now, after initial tests, I realize that I would need to include PHP code which I use for my "normal" web application, in order to calculate the right values to be returned. [That is, instead of returning national statistics, I calculate per capita data or indexed values or aggregations.]

Now, my PHP code in the included file (see below, B) calls a function from another file (C). This works fine. But the value generated in that function is not being brought back to the first file (B).

• A: Code Slim level.... include (xx.php, yy.php)
• B: xx.php: call_to_function_from_yy()
• C: yy.php: generate result; global $results (with $results having indeed values)
• B: $results is empty

Any hints why that would be and what I can do? Thanks a lot!

Assuming your yy.php has something like this:

function returnResults($parameter) {
 /*
  * your pretty code here
  */
 return $results;
}

And your xx.php file does something like this:

require_once $path_to_your_file . '/yy.php';
 /*
  * your pretty code here
  */

$myResults = returnResults($myParameter);

 /*
  * your pretty code here
  */

In this way you get the result from yy.php in xx.php, I can improve this answer if you could who a lil' snippet of yy.php and xx.php.