I am using nusoap library to connect to Kintera API.  It worked fine on my other sites, but this one was giving me the following error message:

Fatal error: Uncaught SoapFault exception: [Client] SoapClient::SoapClient() [<a href=’soapclient.soapclient’>soapclient.soapclient</a>]: Invalid parameters in /test.php:147 Stack trace: #0 /test.php(147): SoapClient->SoapClient(’KinteraConnect….’, true) #1 {main} thrown in /test.php on line 147

Line 147 has the following code:

$client = new soapclient($wsdl,true);

After reading up online a bit, it seems this error appears on PHP 5 servers because of class name conflicts. So I opened up nusoap.php file and figured that you could just use nusoap_client as a class name. Code piece from nusoap.php

if (!extension_loaded('soap')) {

/***    For backwards compatiblity, define soapclient unless the PHP SOAP extension is loaded.*/

class soapclient extends nusoap_client {

}

}

So I just went ahead and changed

$client = new soapclient($wsdl,true);

to

$client = new nusoap_client($wsdl,true);

and it fixed it.