Call PHP function variable from separate file - php

Question

I have a class function that calls JSON from a URL. That function then sets a list of variables from the results of the JSON.
What I am attempting to do is call back one of those strings from inside of another file (index.html). I do not receive any errors back, however the results are blank.
I'm sure it's not due to the json command because it works properly when not placed inside of a class/function. To be sure I attempted to add $somestring4 = 'this is string 4' into the ClassFile.php and call it - it was also blank.
Here is my code...
ClassFile.php
<?php
class newClass {
Function newFunction(){
$jsonFetched = file_get_contents('http://url.com/file.json'); //<== MISSING SINGLE QUOTES ADDED FOR CODE-READABILITY...
$jsonQuery = json_decode($jsonFetched);
$someString1 = $jsonQuery->level1->level2->string1 ;
$someString2 = $jsonQuery->level1->level2->string2 ;
$someString3 = $jsonQuery->level1->level2->string3 ;
}
}
$foo = new newClass;
?>
Call from Index.html
<?php
include($sitePath . '/classes/ClassFile.php') ;
$refClass = new newClass();
$someString3 = $refClass->newFunction();
echo $someString3;
?>
Thanks for the help and sorry for the ignorance.

Answer 1

<?php
class newClass {
public $jsonFetched = '';
public $jsonQuery = '';
public $someString1 = '';
public $someString2 = '';
public $someString3 = '';
function newFunction(){
$jsonFetched = file_get_contents('http://url.com/file.json');
$jsonQuery = json_decode($jsonFetched);
$this->someString1 = $jsonQuery->level1->level2->string1 ;
$this->someString2 = $jsonQuery->level1->level2->string2 ;
$this->someString3 = $jsonQuery->level1->level2->string3 ;
}
}
?>
<?php
include($sitePath . '/classes/ClassFile.php') ;
$refClass = new newClass();
$refClass->newFunction();
echo $refClass->someString3;
?>