如果您对FCM一无所知,请访问：https://firebase.google.com/docs/cloud-messaging/concept-options

请在下面找到PHP发送代码的推送通知.

function senDFCMPushnotification($arr) {
    $device_token = $arr['device_token'];
    $message = $arr['message'];

    $url = 'https://fcm.GOOGLEapis.COM/fcm/send';

    $fields = array (
            'registration_ids' => array (
                    $device_token
            ),'data' => array (
                "message" => $message,"sound"    =>  "default"
            ),'notification' => array(
                'body'  => $message,'tITle' =>  'PRojectName',)
    );

    $fields = json_encode ( $fields );    
    $headers = array (
            'Authorization: key=' . "PUT_YOUR_FCM_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 ( $ch,CURLOPT_RETURNtransfer,CURLOPT_POSTFIELDS,$fields );

    $result = curl_exec ( $ch );
    var_dump($result);
    curl_close ( $ch );
}
$arr = [
    'device_token'  =>  "PLACE_YOUR_DEVICE_TOKEN",'message'  =>  'PLACE_YOUR_MESSAGE',];
sendFCMPushnotification($arr);