PHP&；XML-如何生成soap请求错误415

如果有人能帮我的话，为什么我会得到错误415我不明白为什么会出现错误链接到错误http://agency.lastminute-hr.com/stranice/upisi_destinacije_unico.php

这就是xml

POST /services/WebService.asmx HTTP/1.1
Host: wl.filos.com.gr
Content-Type: application/soap+xml; charset=utf-8
Content-Length: length
    <?xml version="1.0" encoding="utf-8"?>
    <soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
      <soap12:Body>
        <PlaceSearch xmlns="http://www.cyberlogic.gr/webservices/">
          <xml>string</xml>
        </PlaceSearch>
      </soap12:Body>
    </soap12:Envelope>

我的代码是：

$soapUrl = "http://wl.filos.com.gr/services/WebService.asmx?op=PlaceSearch";

$soap_request  = "<?xml version='"1.0'" encoding='"utf-8'"?>'n";
  $soap_request .= "<soap:Envelope xmlns:xsi='"http://www.w3.org/2001/XMLSchema-instance'" xmlns:xsd='"http://www.w3.org/2001/XMLSchema'" xmlns:soap='"http://schemas.xmlsoap.org/soap/envelope/'">'n";
  $soap_request .= " <soap:Body>'n";
  $soap_request .= "  <PlaceSearch xmlns='"http://www.cyberlogic.gr/webservices/'">'n";
  $soap_request .= "  <xml><PlaceSearchRequest><Username>******</Username><Password>******</Password><PlaceType>Cities</PlaceType><Language>en</Language></PlaceSearchRequest></xml>'n";
  $soap_request .= "   </PlaceSearch>'n";
  $soap_request .= "  </soap:Body>'n";
  $soap_request .= "</soap:Envelope>";
 $xml_post_string  =  $soap_request;

$headers = array(
"POST /services/WebService.asmx HTTP/1.1",
"Host: wl.filos.com.gr",
"Content-Type: application/soap+xml; charset=utf-8",
"Content-Length: ".strlen($xml_post_string)
); 


$url = $soapUrl;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS,  ($xml_post_string) );
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$response = curl_exec($ch); 
$info = curl_getinfo($ch);
     // echo results
        echo "The server responded: <br />";
        echo   " " .  $info['http_code'].  "  <br />";
curl_close($ch);        
$response1 = str_replace("<soap12:Body>","",$response);
$response2 = str_replace("</soap12:Body>","",$response1);
$parser = simplexml_load_string($response2);