Wildcard for SOAP find method?

Hi,

I notice when using SoapUI for testing a webservice using the find method, that if I leave the values blank, I get all records -- which is what I need.

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:m11="http://xmlns.oracle.com/Enterprise/Tools/schemas/M111111.V1">
<soapenv:Header/>
<soapenv:Body>
<m11:Find__CompIntfc_MBL_UPDT>
<m11:MS_STARTDATE></m11:MS_STARTDATE>
<m11:MS_ENDDATE></m11:MS_ENDDATE>
<m11:MS_ID></m24:_MS_ID>
</m11:Find__CompIntfc_MBL_UPDT>
</soapenv:Body>
</soapenv:Envelope>

So when using PHP to make requests, how would I make the request with a wildcard? Is there a way to do that?

Something like the following non-working example?

$result = $client->msfind(array('MS_ID'=>"",'MS_STARTDATE'=>"", 'MS_ENDDATE'=>""));