$data = array("grant_type" => "password", "client_id" => "*********************************","client_secret"=>"************","username" =>"*********","password" => "**************");
$data_string = json_encode($data);   
$ch = curl_init('https://login.salesforce.com/services/oauth2/token');     

curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");                                                                     
curl_setopt($ch, CURLOPT_POSTFIELDS, $params); 
curl_setopt($ch, CURLOPT_HEADER,true);                                                                 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, false);  
curl_setopt($ch, CURLOPT_HTTPHEADER, array(                                                                          
    'Content-Type: application/json',                                                                                
    'Content-Length: ' . strlen($data_string))                                                                       

$result = curl_exec($ch);

if($result === false)
    echo 'Curl error: ' . curl_error($ch);
    echo 'Operation completed without any errors';

$info = curl_getinfo($ch);
echo curl_getinfo($ch);
echo $info['access_token'];
echo curl_getinfo($ch, CURLINFO_HTTP_CODE);

$result1= file_get_contents($url);
var_dump(json_decode($result1, true));


Try using these parameters

  1. The content-type HTTP header should be application/x-www-form-urlencoded
  2. The grant_type form parameter should be password (all lower case)

You are setting the POSTFIELDS to $params but you are not ever setting $params. You set the values to the $data_String. Many other problems as well I think but I am not an expert in php

Here is the relevant parts of what I have used that works just fine (the require is just the variables I use:

require_once 'configPWFlow.php';


$token_url = LOGIN_URI . "/services/oauth2/token";

$params = "grant_type=password"
    . "&client_id=" . CLIENT_ID
    . "&client_secret=" . CLIENT_SECRET
    . "&username=" . USERNAME
    . "&password=" . PASSWORD;

$curl = curl_init($token_url);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $params);

$json_response = curl_exec($curl);
  • Thanks for you answer! I have few questions regarding this. 1> require_once will be the name of my PHP? 2> the format of token url I am using is : $url='login.salesforce.com/services/oauth2/token'; is this correct? 3> also I did not get the dots(.) you entered in params as the format is different as of what I am using. Can we tell me the exact format? I am trying to post some data to salesforce. Is it different from regular POST? – shweta Jul 5 '16 at 15:38
  • @shweta - the single dot is a concatenation operator for strings in php. The ... is just a placeholder for the rest of your code. The require once in my example is just a file with my defines. – Eric Jul 5 '16 at 16:34

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