Twitter API using curl in PHP "direct_messages/new.json" - php

Question

I am using the oauth library to use twitter API for sending the Direct Message to user using curl,but getting the "{"errors":[{"code":215,"message":"Bad Authentication data."}]}".
If i use terminal for curl then it works fine, but getting error while sending through PHP.
<pre>
<?php
error_reporting(1);
require("twitterOauth/autoload.php");
use Abraham\TwitterOAuth\TwitterOAuth;
$text = "Hello, How Are U?";
$headers = array(
'Authorization: OAuth oauth_consumer_key="OAuth oauth_consumer_key",
oauth_nonce="oauth_nonce",
oauth_signature="oauth_signature",
oauth_signature_method="HMAC-SHA1",
oauth_timestamp="1439978004",
oauth_token="oauth_token",
oauth_version="1.0"'
);
// Get cURL resource
$curl = curl_init();
// Set some options - we are passing in a useragent too here
curl_setopt_array($curl, array(
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_URL => 'https://api.twitter.com/1.1/direct_messages/new.json',
CURLOPT_POST => 1,
CURLOPT_SSL_VERIFYPEER => 0,
CURLOPT_POSTFIELDS => array(
'text' => urlencode($text),
'screen_name' => 'screen_name'
),$headers
));
// Send the request & save response to $resp
$resp = curl_exec($curl);
print_r('Curl error: ' . curl_error($resp));
echo '<pre>'; print_r($resp); die;
// Close request to clear up some resources
curl_close($curl);
?>
</pre>