后端开发零碎问题

1.发送POST请求，携带json数据

public static function doPost2($url, array $params)
{
  $options = array(
    'http' => array(
      'method' => 'POST',
      'content' => json_encode($params),
      'header' => "Content-Type: application/json\r\n" .
      "Accept: application/json\r\n"
    )
  );
  $context = stream_context_create($options);
  $result = file_get_contents($url, false, $context);
  $response = json_decode($result, true);
  return $response;
}