<?php
$username = 'xxx';
$password = 'xxx';
$userpass = $username . ":" . $password;
$headers=array(
        'Authorization: Basic '. base64_encode($userpass),
        'Accept: */*',
        'Accept-Encoding: gzip, deflate'
);

const ECSET_AUTH = 'xxx';

if(isset($_REQUEST['ecset'])){
    SendEcset($_REQUEST['ecset']);
}

function SendEcset($ecset){
    global $headers, $username, $password;
    $params = array(
        "client_id" => "xxx",
        "client_secret" => "xxx",
        "grant_type" => "client_credentials",
    );

    $curl = curl_init(ECSET_AUTH);
    curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($curl, CURLOPT_HEADER, true);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_POST, true);
    curl_setopt($curl, CURLOPT_HEADER,'Content-Type: application/x-www-form-urlencoded');

    $postData = "";

    foreach($params as $k => $v)
    {
       $postData .= $k . '='.urlencode($v).'&';
    }

    $postData = rtrim($postData, '&');
    curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
    echo "Performing Request...";

    $json_response = curl_exec($curl);

    $status = curl_getinfo($curl, CURLINFO_HTTP_CODE);

    if ($status != 200) {
      throw new Exception("Error: call to URL $endpoint failed with status $status, response $json_response, curl_error " . curl_error($curl) . ", curl_errno " . curl_errno($curl) . "\n");
    }
    curl_close($curl);

    return $json_response;
}
?>