How to turn off warnings when using NUSOAP with PHP 5

Hello!

How can I turn off warnings on per page basis when using NUSOAP with PHP 5?

I have been trying to convert a NuSOAP WS call to a PHP 5 Soap Extension call but no luck there.
Is there a best practices document that describes the steps to follow for a migration from NuSOAP Client to PHP5 SoapClient?

Attached is a sample NuSOAP Client Call that needs to be upgraded to PHP 5 SoapClient.
Any help with that would be greatly appreciated as my attempts have failed so far :-(

Thanks, D.

<?php
/*
 * The code bellow works fine with PHP4 and PHP5 but sends deprecated warnings for PHP5
 * This is a sample NuSOAP code that needs to be translated into PHP5 Soap Extension code 
 * using SoapClient class instead of nusoap_client class.
 * Any help would be greatly appreciated. If you live in the SoCal area I will throw in 
 * Happy Hour drinks ;-)
 */

// This funtion handles the loging part
function sodCall($wsdl, $method, $params) {
    require_once('lib/nusoap.php');
    $sodClient = new nusoap_client($wsdl, true);
    $sodClient->response_timeout = 600;

    if ($_SESSION == "" || time() > $_SESSION) {
        $header = '<wsse:Security xmlns:wsse="http://schemas.xmlsoap.org/ws/2002/xx/secext">
                    <wsse:UsernameToken>
                    <wsse:Username>MYUSERNAME</wsse:Username>
                    <wsse:Password>PASSWORD</wsse:Password>
                    </wsse:UsernameToken>
                    </wsse:Security>';
        $sodResult = $sodClient->call($method, $params,'','',$header);
        $cookies = $sodClient->getCookies();
        $_SESSION = $cookies[0];
    } else {
        $sodClient->setCookie("JSESSIONID", $_SESSION);
        $sodResult = $sodClient->call($method, $params);
    }
    if ($sodResult) {
        $_SESSION = time() + 598; // 10 minute timeout
        return $sodResult;
    }
}

// variable used for the data retrieval selection
$accountid = 'HE3598-1JGJF';

//body of the soap call
$findLead = array(
    "LeadWS_LeadQueryPage_Input" => array(
        "ListOfLead" => array(
            "Lead" => array(
                "AccountId" => "='$accountid'",
                "LeadId" => "",
                "LeadEmail" => "",
                "ContactId" => "",
                "ContactFullName" => ""
            )
        ), "PageSize" => "100"
    )
);

//soap call execution
$findLeadResult = sodCall('wsdl/v2/Lead.wsdl','LeadQueryPage',$findLead);
?>
<pre><?php var_dump($findLeadResult);?></pre>

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