$data = array(
        'oauth_consumer_key' => $key,
        'oauth_nonce' => $nonce,
        'oauth_signature_method' => 'HMAC-SHA1',
        'oauth_timestamp' => $timestamp,
        'oauth_token' => $token,
        'oauth_version' => '1.0',
        'oauth_signature' => $sign
    );

    $options = array(
        'http' => array(
            'header'  => "Content-type: application/x-www-form-urlencodedrn",
            'method'  => 'POST',
            'content' => http_build_query($data)
        )
    );

    $url = 'https://www.wrike.com/api/xml/v2/' . $method . '?';
    $context = http_build_query($data);
    $context  = stream_context_create($options);
    $result = file_get_contents($url, false, $context);