使用PHP的EWS推送订阅

有人知道如何使用PHP响应EWS(Exchange Web服务)推送通知.

Does anyone know how to respond to EWS (Exchange Web Services) Push Notifications using PHP.

我已经启动 EWS推送订阅，但是当EWS向我的服务发送SOAP通知时，似乎无法发送正确的SOAP响应(以保持订阅有效).

I have initiated the EWS Push Subscription but cannot seem to send the correct SOAP response (in order to keep the subscription alive) when EWS sends my service a SOAP notification.

来自此页，我的印象是我的SOAP响应应该如下:

Taken from this page, I was under the impression that my SOAP response should be as follows:

<s:Envelope xmlns:s= "http://schemas.xmlsoap.org/soap/envelope/">
    <s:Body>
        <SendNotificationResult xmlns="http://schemas.microsoft.com/exchange/services/2006/messages">
            <SubscriptionStatus>OK</SubscriptionStatus>
        </SendNotificationResult>
    </s:Body>
</s:Envelope>

但是，EWS似乎并没有接受我的回应为有效.

However, EWS doesn't seem to be accepting my response as valid.

我尝试了以下2个代码段，但没有运气:

I have tried the following 2 code snippets with no luck:

使用带有Content-Type标头的SOAP字符串进行响应

header( 'Content-Type: text/xml; charset=utf-8' );

echo '<?xml version="1.0" encoding="utf-8"?>'.
'<s:Envelope xmlns:s= "http://schemas.xmlsoap.org/soap/envelope/">'.
    '<s:Body>'.
        '<SendNotificationResult xmlns="http://schemas.microsoft.com/exchange/services/2006/messages">'.
            '<SubscriptionStatus>OK</SubscriptionStatus>'.
        '</SendNotificationResult>'.
    '</s:Body>'.
'</s:Envelope>';

或使用SOAP服务进行响应

class ewsService {
    public function SendNotification( $arg ) {
        $result = new EWSType_SendNotificationResultType();
        $result->SubscriptionStatus = 'OK';
        return $result;
    }
}

$server = new SoapServer( null, array(
    'uri' => $_SERVER['REQUEST_SCHEME'].'://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'],
));
$server->setObject( new ewsService() );
$server->handle();

知道我在代码中使用的类可能来自 PHP-EWS库，这可能会有所帮助.

It might help to know that the classes I am using in my code come from the PHP-EWS library.

任何帮助将不胜感激.

我还在此处发布了一个更具体的问题，但没有任何回应，因此我想问一问是否有人真的可以使用任何方法来完成这项工作.

I also posted a more specific question here, but have had no responses so thought I would ask whether someone has actually gotten this working using any method.