Simple HTTP client for GET and POST methods

StreamHttpClient.php

<?php

class StreamHttpClient implements HttpClient
{
    public function request($url, $method, array $parameters = [])
    {
        $content = http_build_query($parameters);

        $options = ['method' => $method];

        if (strtolower($method) === 'post') {
            $options += [
                'header' => 'Content-type: application/x-www-form-urlencoded',
                'content' => $content
            ];
        }

        if (strtolower($method) === 'get') {
            $url .= '?' . $content;
        }

        return file_get_contents($url, false, stream_context_create([
            'http' => $options
        ]));
    }
}