Email Contact retrieivng code running well on localhost but not server - codeigniter

Question

I have the following script which retrieves code from gmail. the code runs well in localhost, but gives error when i upload it on server and make it eun. The script is made in codeigniter.
<?php
class invite_friends extends CI_Controller{
var $FEED_URL = "http://www.google.com/m8/feeds/contacts/default/full";
var $LOGIN_URL = "https://www.google.com/accounts/ClientLogin";
var $username = "my_qmail#gmail.com";
var $passwd = "my_passowrd";
var $postData = array();
function __construct() {
parent::__construct();
session_start();
}
function index()
{
if(isset($_SESSION['logged_user']))
redirect(base_url().'home');
$this->load->view('header');
$this->load->view('invite_friends');
$this->load->view('footer');
}
/*function GmailContacts_lib($gUsername, $gPassword) {
//constructor function
$this->username = $gUsername;
$this->passwd = $gPassword;
}*/
function get_gmail_contacts() {
$emailLists = array();
//create an array for post data
$this->postData = array(
"accountType" => "HOSTED_OR_GOOGLE",
"Email" => $this->username,
"Passwd" => $this->passwd,
"service" => "cp",
"source" => "anything"
);
//initialize the curl object
$curl = curl_init($this->LOGIN_URL);
//set the curl options
$this->set_curl_options($curl, CURLOPT_POST, true);
$this->set_curl_options($curl, CURLOPT_POSTFIELDS, $this->postData);
$this->set_curl_options($curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
$this->set_curl_options($curl, CURLOPT_SSL_VERIFYPEER, false);
$this->set_curl_options($curl, CURLOPT_RETURNTRANSFER, 1);
//following variable contains the responses
$response = curl_exec($curl);
//check if the user has logged in sucessfully
//and save auth key if logged in
preg_match("/Auth=([a-z0-9_\-]+)/i", $response, $matches);
$auth = $matches[1];
if( !empty($auth)) {
$headers = array("Authorization: GoogleLogin auth=".$auth);
//make the request to google contacts feed with the auth key maximum contacts is 10000
$curl1 = curl_init($this->FEED_URL);
//passing the headers of auth key
$this->set_curl_options($curl1, CURLOPT_HTTPHEADER, $headers);
//return the result in a variable
$this->set_curl_options($curl1, CURLOPT_RETURNTRANSFER, 1);
//results response
$feed = curl_exec($curl1);
//parse the feed and return email list array
$emailLists = $this->parse_response($feed);
}
else {
$emailLists = array("Invalid Username/Password");
}
print_r($emailLists);
}
//function to set curl options
function set_curl_options($ch, $option, $value) {
//make the post TRUE
return curl_setopt($ch, $option, $value);
}
//function to parse response
public function parse_response($feed) {
$contacts = array();
$doc = new DOMDocument();
//load the XML response
$doc->loadXML($feed);
//check the entry tag
$nodeList = $doc->getElementsByTagName( 'entry' );
foreach($nodeList as $node) {
//children of each entry tag
$entry_nodes = $node->childNodes;
$tempArray = array();
foreach($entry_nodes as $child) {
//get the tagname of the child
$domNodesName = $child->nodeName;
switch($domNodesName) {
case "title":
{ $tempArray['fullName'] = $child->nodeValue; }
break;
case "gd:email":
{
if (strpos($child->getAttribute('rel'),'home')!==false)
$tempArray['email_1']=$child->getAttribute('address');
elseif(strpos($child->getAttribute('rel'),'work')!=false)
$tempArray['email_2']=$child->getAttribute('address');
elseif(strpos($child->getAttribute('rel'),'other')!==false)
$tempArray['email_3']=$child->getAttribute('address');
}
break;
} //end of switch for nodeNames
} //end of foreach for entry_nodes child nodes
if( !empty($tempArray['email_1'])) $contacts[$tempArray['email_1']] = $tempArray;
if( !empty($tempArray['email_2'])) $contacts[$tempArray['email_2']] = $tempArray;
if( !empty($tempArray['email_3'])) $contacts[$tempArray['email_3']] = $tempArray;
}
return $contacts;
}
}
?>
it gives error and here is the error
A PHP Error was encountered
Severity: Notice
Message: Undefined offset: 1
Filename: controllers/invite_friends.php
Line Number: 54

Answer 1

I would suggest changing your code to the following
if(preg_match("/Auth=([a-z0-9_\-]+)/i", $response, $matches))
{
$auth = $matches[1];
}
else
{
$auth = null;
}
You could set $auth to null or 0. But if you set it to null I would then instead check:
if(!is_null($auth)) {