问在PHP中如何使用curl将签名的xml作为soap请求发送

EN

    $message = <?xml version="1.0"....signed xml data...</SOAP-ENV:Envelope>
    $headers = array(
        "Content-type: text/xml;charset=\"utf-8\"",
        "Accept: text/xml",
        "Cache-Control: no-cache",
        "Pragma: no-cache",
        "SOAPAction: ''",
        "Content-length: ".strlen($message),
    );

    $result = array();

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_VERBOSE, false);
    curl_setopt($ch, CURLOPT_URL, $this->endpoint);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $message);
    $result['soap_result'] = $this->cleanXML(curl_exec($ch));