Firebase推送通知不会使用react-native在后台发送通知

我将开发一个使用Firebase推送通知的react-native应用程序，当我从Firebase控制台发送推送通知时，它正在应用程序的后台和前台工作，但是当我使用PHP（WordPress）从我的服务器发送通知时只是在应用程序处于前台而不是后台时发送通知，但通知消息结果显示成功 . 在这里，我将提供一些代码

移动方面：

import React, { Component } from "react";

    import { Platform, AsyncStorage } from 'react-native';

    import FCM, { FCMEvent, RemoteNotificationResult, WillPresentNotificationResult, NotificationType } from "react-native-fcm";

    export default class PushNotificationController extends
      Component {
      constructor(props) {
        super(props);
        console.ignoredYellowBox = ['Setting a timer'];

        this.state = {
          firebase_token :'',
        }
      }
      saveFirebaseToken() {
        console.log("------------- as "+this.state.firebase_token+" ---------- ");
        AsyncStorage.setItem('firebase_token', this.state.firebase_token);
      }
      componentDidMount() {
        FCM.requestPermissions();

        FCM.getFCMToken().then(token => {
          console.log(token+' on getFCMToken');

          this.setState({

            firebase_token: token,
          })
          this.saveFirebaseToken()
        });

        FCM.getInitialNotification().then(notif => {
          console.log("INITIAL NOTIFICATION", notif)
        });

        this.notificationListner = FCM.on    (FCMEvent.Notification, notif => {
          console.log("Notification", notif);
          if (notif.local_notification) {
            return;
          }
          if (notif.opened_from_tray) {
            return;
          }

          if (Platform.OS === 'ios') {
            //optional
            //iOS requires developers to call completionHandler to end notification process. If you do not call it your background remote notifications could be throttled, to read more about it see the above documentation link.
            //This library handles it for you automatically with default behavior (for remote notification, finish with NoData; for WillPresent, finish depend on "show_in_foreground"). However if you want to return different result, follow the following code to override
            //notif._notificationType is available for iOS platfrom
            switch (notif._notificationType) {
              case NotificationType.Remote:
                notif.finish(RemoteNotificationResult.NewData) //other types available: RemoteNotificationResult.NewData, RemoteNotificationResult.ResultFailed
                break;
              case NotificationType.NotificationResponse:
                notif.finish();
                break;
              case NotificationType.WillPresent:
                notif.finish(WillPresentNotificationResult.All) //other types available: WillPresentNotificationResult.None
                break;
            }
          }
          this.showLocalNotification(notif);
        });

        this.refreshTokenListener = FCM.on(FCMEvent.RefreshToken, token => {
          console.log("TOKEN (refreshUnsubscribe)", token);
        });
      }

      showLocalNotification(notif) {
        FCM.presentLocalNotification({
          title: notif.title,
          body: notif.body,
          priority: "high",
          click_action: notif.click_action,
          show_in_foreground: true,
          local: true
        });
      }

      componentWillUnmount() {
        this.notificationListner.remove();
        this.refreshTokenListener.remove();
      }
      render() {
        return null;
      }
    }

在清单中添加了代码：

<receiver android:name="com.evollu.react.fcm.FIRLocalMessagingPublisher"/>
     <receiver android:enabled="true" android:exported="true"  android:name="com.evollu.react.fcm.FIRSystemBootEventReceiver">
         <intent-filter>
             <action android:name="android.intent.action.BOOT_COMPLETED"/>
            <action android:name="android.intent.action.QUICKBOOT_POWERON"/>
             <action android:name="com.htc.intent.action.QUICKBOOT_POWERON"/>
             <category android:name="android.intent.category.DEFAULT" />
         </intent-filter>
     </receiver>
       <service android:name="com.evollu.react.fcm.MessagingService" android:enabled="true" android:exported="true">
    <intent-filter>
      <action android:name="com.google.firebase.MESSAGING_EVENT"/>
    </intent-filter>
  </service>

  <service android:name="com.evollu.react.fcm.InstanceIdService" android:exported="false">
    <intent-filter>
      <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
    </intent-filter>
 </service>

这是服务器代码：

function send_notification($tokens, $message)
    {


        $url = 'https://fcm.googleapis.com/fcm/send';
        $fields = array(
             'registration_ids' => $tokens,
             'data' => $message
            );
        $headers = array(
            'Authorization:key = My_KEY',
            'Content-Type: application/json'
            );

       $ch = curl_init();
       curl_setopt($ch, CURLOPT_URL, $url);
       curl_setopt($ch, CURLOPT_POST, true);
       curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
       curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
       curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0);  
       curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
       curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
       $result = curl_exec($ch);           
       if ($result === FALSE) {
           die('Curl failed: ' . curl_error($ch));
       }
       curl_close($ch);

       return $result;
    }