src/HttpClient.php
public static function post($url, $options = [])
    {
        $key = is_array($options) ? 'form_params' : 'body';

        return self::request('POST', $url, [$key => $options]);
    }
public static function post($url, $options = [])
    {
        $key = is_array($options) ? 'form_params' : 'body';

        return self::request('POST', $url, [$key => $options]);
    }
post请求
@param       $url
@param array $options
@return bool|\Psr\Http\Message\StreamInterface
@throws \GuzzleHttp\Exception\GuzzleException