loggable_guzzle.php

<?php

/** 
 * @param $log_name
 * @param array $guzzle_options
 * @return \GuzzleHttp\Client
 */
function logging_guzzle($log_name, array $guzzle_options = [])
{
    $log_file = storage_path('logs/' . $log_name . '.log');
    $writer = new \Monolog\Handler\StreamHandler($log_file);
    $writer->setFormatter(new \Monolog\Formatter\LineFormatter(null, null, true));
    $logger = new \Monolog\Logger($log_name);
    $logger->pushHandler($writer);

    $handler = \GuzzleHttp\HandlerStack::create();
    $handler->push(\GuzzleHttp\Middleware::log(
        $logger,
        new \GuzzleHttp\MessageFormatter(\GuzzleHttp\MessageFormatter::DEBUG)
    ));

    return new \GuzzleHttp\Client(array_merge(array(
        'handler' => $handler,
        'http_errors' => false,
    ), $guzzle_options));
}