在发送请求之前检查SoapClient XML标头和正文

Question

阅读后：

Inspect XML created by PHP SoapClient call before/without sending the request

使用本文中的代码：

Can I preview the XML that PHP SOAP wants to send before sending it?

我成功地能够预览我的Soap请求的XML Body，而无需发送到我的目标网址。 非常适合调试，喜欢它！

我也试图获得标题。 在发送xml之前可以吗？

这是我到目前为止所做的工作：

<?php
class DebugSoapClient extends SoapClient {
  public $sendRequest = true;
  public $echoRequest = false;
  public $formatXML = false;

  public function __doRequest($request, $location, $action, $version, $one_way=0) {
    if ( $this->echoRequest ) {

      if ( !$this->formatXML ) {
        $out = $request;
      } else {
        $doc = new DOMDocument;
        $doc->preserveWhiteSpace = false;
        $doc->loadxml($request);
        $doc->formatOutput = true;
        $out = $doc->savexml();
      }
      echo $out;
    }
    // if I want to send the request
    if ( $this->sendRequest ) {
      return parent::__doRequest($request, $location, $action, $version, $one_way);
    }
    else {
      return '';
    }
  }
}

$wsdlfile = 'http://www.w3schools.com/webservices/tempconvert.asmx?WSDL';
$client = new DebugSoapClient($wsdlfile, array('trace' => 1));
$client->sendRequest = false;
$client->echoRequest = true;
$client->formatXML = true;

$parameter = array('Fahrenheit'=>'100');
$res = $client->FahrenheitToCelsius($parameter);
var_dump($res);

// echo $client->__getLastRequestHeaders(); // this isn't working as expected

?>

我已尝试添加__getLastRequestHeaders()，但我没有得到预期的结果。