Zoho crm api v2 for php - php

Question

I am trying to connect with Zoho CRM using PHP. I followed PHP SDK for Zoho CRM and installed the package.
<?php
require 'vendor/autoload.php';
use zcrmsdk\crm\setup\restclient\ZCRMRestClient;
use zcrmsdk\oauth\ZohoOAuth;
$configuration =array("client_id"=>"clientid","client_secret"=>"clientsecret","redirect_uri"=>"redirecturl","currentUserEmail"=>"useremail");
$a = ZCRMRestClient::initialize($configuration);
$oAuthClient = ZohoOAuth::getClientInstance();
$refreshToken = "refreshtoken";
$userIdentifier = "emailid";
$oAuthTokens = $oAuthClient->generateAccessTokenFromRefreshToken($refreshToken,$userIdentifier);
$result = ZCRMRestClient::getModule("Contacts");
print_r($result);
exit;
?>
error I am getting:
Not able to get access token from refresh token, invalid client_id.
But I am using correct credentials to connect Zoho API.

Answer 1

Spent a day on this myself when I set it up.
Make sure that you are using the same domain for the api and the oauth client app.
They have 2 domains:
https://accounts.zoho.com
https://accounts.zoho.eu
If you created the oauth clinet app on one, use the same one for the api endpoint.

Answer 2

Further to this, if you are using accounts_url=https://accounts.zoho.eu in the oauth_configuration.properties file, then you should also set apiBaseUrl=www.zohoapis.eu in the configuration.properties file.
Given the parameters are read from these two properties files, I don't think you need that configuration array.