API functions

api_functions.php

<?php

/**
 * @param string $path   prepended with a slash
 * @param string $data   to send
 * @param string $method default POST
 * @param string $header to send
 *
 * @return string response
 */
function request($path, $data = null, $method = 'POST', $header = null)
{
    $context = stream_context_create([
        'http' => [
            'method'  => $method,
            'header'  => $header,
            'content' => $data,
        ]
    ]);

    return file_get_contents($path, false, $context);
}

/**
 * @param string $path    prepended with a slash
 * @param array  $data    serializable
 * @param string $method  default POST
 * @param array  $headers to send
 *
 * @return array response
 */
function requestJson($path, array $data = [], $method = 'POST', array $headers = [])
{
    $headers['Content-Type'] = 'application/json; charset=utf-8';
    $headers['Accept'] = 'application/json';
    $headers['Accept-Charset'] = 'utf-8';

    $header = implode(PHP_EOL, array_map(function($key, $value) {
        return sprintf('%s: %s', $key, $value);
    }, array_keys($headers), $headers));

    return json_decode(request($path, json_encode($data), strtoupper($method), $header), true);
}