Import GMail Contacts Google OAuth Connect with PHP.

Step 1

Add or register your domain at click here.

Step 2

Verify your domain ownership with HTML file upload or including META tag.

Step 3

Google will provide you OAuth consumer key and OAuth consumer secret key. 

Step 4

Download script configurations.

Config.php
You have to change Oauth keys and return URL.

<?php
$consumer_key='demos.9lessons.info';
$consumer_secret='Eeqmv3xxEO2lfA_rM1uVXZ3M';
$callback='http://demos.9lessons.info/gmail/Contacts.php';
$emails_count='500'; // max-results 
?>

GmailConnect.php
Contains PHP code. Connecting to Google for requesting open authentication access tokens. 

<?php
include_once 'GmailOath.php';
include_once 'Config.php';
session_start();
$oauth =new GmailOath($consumer_key, $consumer_secret, $argarray, $debug, $callback);
$getcontact=new GmailGetContacts();
$access_token=$getcontact->get_request_token($oauth, false, true,true);
$_SESSION['oauth_token']=$access_token['oauth_token'];
$_SESSION['oauth_token_secret']=$access_token['oauth_token_secret'];
?>

<a href="https://www.google.com/accounts/OAuthAuthorizeToken?oauth_token=<?php echo $oauth->rfc3986_decode($access_token['oauth_token']) ?>"> 
<img src='Googleconnect.png'/> 
</a>

Contacts.php
Google return to Contact.php file with contacts data.

<?php
include_once 'GmailOath.php';
include_once 'Config.php';
session_start();
$oauth =new GmailOath($consumer_key, $consumer_secret, $argarray, $debug, $callback);
$getcontact_access=new GmailGetContacts();
$request_token=$oauth->rfc3986_decode($_GET['oauth_token']);
$request_token_secret=$oauth->rfc3986_decode($_SESSION['oauth_token_secret']);
$oauth_verifier= $oauth->rfc3986_decode($_GET['oauth_verifier']);
$contact_access = $getcontact_access->get_access_token($oauth,$request_token, $request_token_secret,$oauth_verifier, false, true, true);
$access_token=$oauth->rfc3986_decode($contact_access['oauth_token']);
$access_token_secret=$oauth->rfc3986_decode($contact_access['oauth_token_secret']);
$contacts= $getcontact_access->GetContacts($oauth, $access_token, $access_token_secret, false, true,$emails_count);

//Email Contacts 
foreach($contacts as $k => $a)
{
$final = end($contacts[$k]);
foreach($final as $email)
{
echo $email["address"] ."<br />";
}
}?>