Webapplication stops running code after calling function from another file - php

Question

My web app stops when it tries executing a function from another file. I am using a include_once to include the file where the function is. I am also pretty sure that the path is correct. (if there is anyway to check let me know). the functions which I am trying to use are written in the class.connections.php . Also as you can see I am echoing 2 test. Only the first one shows.
Invite.php
global $page_array ;
global $current_user ;
include_once(DITC_PATH."/class.friends.php");
include_once(DITC_PATH."/class.connections.php");
$process_status = $current_user->process_hotmail_contacts ;
global $page_array ;
if($page_array['url']['3'] == 'hotmail'){
$process_source = 'hotmail' ;
};
if($_GET['code']){
echo "Test 1 - ";
$access_token_json = get_hotmail_access_token();
echo "Test 2 - ";
if($access_token_json){
echo 'test';
update_user_meta($current_user->ID, 'hotmail_access_token', $access_token_json);
$taskurl = "/tasks";
$data = array();
$data['type'] = 'process_hotmail_contacts';
$data['lang'] = get_site_language();
$data['access_token'] = $access_token_json ;
$data['user_id'] = $current_user->ID ;
$options = array();
add_task($taskurl, $data, $options);
$process_status = 'busy' ;
$process_source = 'hotmail' ;
};
}
$ditc_title = _t("Invite connections") ;
get_header();
function in class.connections
function get_hotmail_access_token(){
global $hotmail_creds;
$fields=array(
'code'=> urlencode($hotmail_creds['auth_code']),
'client_id'=> urlencode($hotmail_creds['client_id']),
'client_secret'=> urlencode($hotmail_creds['client_secret']),
'redirect_uri'=> urlencode($hotmail_creds['redirect_uri']),
'grant_type'=> urlencode('authorization_code')
);
$post = '';
foreach($fields as $key=>$value) { $post .= $key.'='.$value.'&'; }
$post = rtrim($post,'&');
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL,'https://login.live.com/oauth20_token.srf');
curl_setopt($curl, CURLOPT_POST,5);
curl_setopt($curl, CURLOPT_POSTFIELDS,$post);
curl_setopt($curl, CURLOPT_RETURNTRANSFER,TRUE);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER,0);
$result = curl_exec($curl);
curl_close($curl);
$response = json_decode($result);
$access_token_json = $response->access_token;
return $access_token_json;
};