我已经解决了我的问题，如果将来有任何机构遇到此代码对他有用的问题，请检查-

I have solve my question if any body in future have any problem they this code works for him, please check-

<?php
error_reporting(E_ALL);

define('API_SITEID',    $your_siteid);
define('API_USERNAME',  $your_uname);
define('API_PASSWORD',  $your_pass);
define('API_WSDL',      'http://tripauthority.com/hotel.asmx?WSDL');
ini_set("soap.wsdl_cache_enabled", "0");

$xmlReq = '<ArnRequest>
<Availability DisplayCurrency="USD" SearchTimeout="15">
    <HotelAvailability InDate="2014-09-26" OutDate="2014-09-27" Rooms="1" Adults="1" Children="0">
    <Hotel HotelID="8800"/>
    </HotelAvailability>
</Availability>
</ArnRequest>';
echo '<form action="" method="post">
    <strong>XML Request:</strong>
    <p>
    <textarea style="width:100%;height:400px;" id="xmlReq" name="xmlReq">'.$xmlReq.'</textarea>
    </p>
    <input type="submit" name="submit" id="submit" value="Test Request">
    <input type="hidden" name="avail" id="avail" value="y">
</form>';

if($_POST['avail'] == "y") {
    $xmlRes = doSoapRequest((($_POST['xmlReq']) ? $_POST['xmlReq'] : $xmlReq));
    echo '<strong>XML Response:</strong>
    <p>
    <textarea style="width:100%;height:400px;" id="xmlRes" name="xmlRes">'.$xmlRes.'</textarea>
    </p>';
}

function doSoapRequest($xmlReq) {
        try {
    $client = new SoapClient(API_WSDL);
    return $client->SubmitRequestRpc(API_SITEID, API_USERNAME, API_PASSWORD, $xmlReq);
    } catch(SoapFault $exception) {
    return "Fault Code: {$exception->getMessage()}";
    }
}

?>

谢谢