PHP SOAP 发送XML

<?php
$xmldata = <<<EOT
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Body>
 <MOLECULES FORMAT="smi">
     <MOLECULE>C1CCCCC1</MOLECULE>
</MOLECULES>
</soapenv:Body>
</soapenv:Envelope>
EOT;
$wsdl = ‘http://www.vcclab.org/web/services/ALOGPS?wsdl‘;
try{
    $client = new SoapClient($wsdl);
    $result = $client->__doRequest($xmldata,$wsdl,‘getAlogpsResults‘,1,0);//发送xml必须使用__doRequest
    print_r($result);
}catch (SoapFault $e){
    echo $e->getMessage();
}catch(Exception $e){
    echo $e->getMessage();
}