图片上传 
部分微信支付业务指定商户需要使用图片上传 API来上报图片信息,从而获得必传参数的值:图片MediaID 。
| 请求参数 | 类型 | 描述 | 
|---|---|---|
| body | object | multipart/form-data数据结构 | 
| file | object | 媒体图⽚只⽀持JPG、BMP、PNG格式,⽂件⼤⼩不能超过2M。 | 
| meta | string | 媒体文件元信息,使用json表示,包含两个参数: sha256、filename | 
| sha256 | string | 图片文件的 sha256摘要 | 
| filename | string | 商户上传的媒体图片的名称,商户自定义,必须以JPG、BMP、PNG为后缀 | 
php
$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');
$instance->v3->merchant->media->upload->postAsync([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
])
->then(static function(\Psr\Http\Message\ResponseInterface $response) {
  print_r(json_decode((string) $response->getBody(), true));
})
->wait();php
$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');
$instance->chain('v3/merchant/media/upload')->postAsync([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
])
->then(static function(\Psr\Http\Message\ResponseInterface $response) {
  print_r(json_decode((string) $response->getBody(), true));
})
->wait();php
$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');
$instance['v3/merchant/media/upload']->postAsync([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
])
->then(static function(\Psr\Http\Message\ResponseInterface $response) {
  print_r(json_decode((string) $response->getBody(), true));
})
->wait();php
$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');
$response = $instance->v3->merchant->media->upload->post([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
]);
print_r(json_decode((string) $response->getBody(), true));php
$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');
$response = $instance->chain('v3/merchant/media/upload')->post([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
]);
print_r(json_decode((string) $response->getBody(), true));php
$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');
$response = $instance['v3/merchant/media/upload']->post([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
]);
print_r(json_decode((string) $response->getBody(), true));| 返回字典 | 类型 | 描述 | 
|---|---|---|
| media_id | string | 媒体文件标识Id |