php - 具有大图像的Firebase推送通知

Question

如何使用php forserveride发送带有大图像的推送通知？

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$data = array("to" => $token,
              "notification" => array( "title" => $title,
                                       "body" => $message,
                                       "icon" => $image,
                                       "image" => $big_image,
                                       "click_action" => $url));

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我试过这个但我没有成功..

一种解决方案？