SoapClient Returns "NULL", but __getLastResponse() returns XML - php

Question

The variable $response in the below code is NULL even though it should be the value of the SOAP request. (a list of tides). When I call $client->__getLastResponse() I get the correct output from the SOAP service.
Anybody know what is wrong here? Thanks! :)
Here is my code :
$options = array(
"trace" => true,
"encoding" => "utf-8"
);
$client = new SoapClient("http://opendap.co-ops.nos.noaa.gov/axis/webservices/highlowtidepred/wsdl/HighLowTidePred.wsdl", $options);
$params = array(
"stationId" => 8454000,
"beginDate" => "20060921 00:00",
"endDate" => "20060922 23:59",
"datum" => "MLLW",
"unit" => 0,
"timeZone" => 0
);
try {
$result = $client->getHLPredAndMetadata($params);
echo $client->__getLastResponse();
}
catch (Exception $e) {
$error_xml = $client->__getLastRequest();
echo $error_xml;
echo "\n\n".$e->getMessage();
}
var_dump($result);

Answer 1

The reason that the $result (or the response to the SoapCall) is null is indeed because the WSDL is invalid.
I just ran into the same problem - the WSDL said the response should be PackageChangeBatchResponse yet the actual XML returns has PackageChangeResponse
Changing the WSDL to match the response / changing the response to match the WSDL resolves the issue

Answer 2

you should give an option parameter as below :
<?php
// below $option=array('trace',1);
// correct one is below
$option=array('trace'=>1);
$client=new SoapClient('some.wsdl',$option);
try{
$client->aMethodAtRemote();
}catch(SoapFault $fault){
// <xmp> tag displays xml output in html
echo 'Request : <br/><xmp>',
$client->__getLastRequest(),
'</xmp><br/><br/> Error Message : <br/>',
$fault->getMessage();
}
?>
"trace" parameter enables the output of request. Now, you should see the SOAP request.
(source: PHP.net