DIDX:
WebGetDIDCountriesServer.wsdl method, code snippet:
<?php
$parameters=array("XXX","XXX2XXX");
$soapclient= new soapclient('http://api.didx.net/webservice/WebGetDIDCountriesServer.wsdl', array('trace' =>1));
$SoapResult = array();
$SoapResult = $soapclient->__soapCall("getDIDCountry", $parameters);
print_r($SoapResult);
echo "REQUEST:\n" . $soapclient->__getLastResponse() . "\n";
?>

RESULT:

REQUEST:
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope
	xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
	xmlns:ns1="urn:getDIDCountry"
	xmlns:xsd="http://www.w3.org/2001/XMLSchema"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
	<SOAP-ENV:Body>
		<ns1:getDIDCountry>
			<UserID xsi:type="xsd:string">729206</UserID>
			<Password xsi:type="xsd:string">1493c6c4ec</Password>
			<VRatingFrom xsi:nil="true"/>
			<VRatingTo xsi:nil="true"/>
			<Vendors xsi:nil="true"/>
		</ns1:getDIDCountry>
	</SOAP-ENV:Body>
</SOAP-ENV:Envelope>


RESPONSE:

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope
	xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
	xmlns:ns1="urn:getDIDCountry"
	xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
	xmlns:xsd="http://www.w3.org/2001/XMLSchema"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
	<SOAP-ENV:Body>
		<ns1:getDIDCountryResponse>
			<return SOAP-ENC:arrayType="SOAP-ENC:Array[73]" xsi:type="SOAP-ENC:Array">
				<item SOAP-ENC:arrayType="xsd:string[3]" xsi:type="SOAP-ENC:Array">
					<item xsi:type="xsd:string">CountryCode</item>
					<item xsi:type="xsd:string">Description</item>
					<item xsi:type="xsd:string">CountryID</item>
				</item>
				<item SOAP-ENC:arrayType="xsd:string[3]" xsi:type="SOAP-ENC:Array">
					<item xsi:type="xsd:string">1</item>
					<item xsi:type="xsd:string">USA</item>
					<item xsi:type="xsd:string">211</item>
				</item>
				<item SOAP-ENC:arrayType="xsd:string[3]" xsi:type="SOAP-ENC:Array">
					<item xsi:type="xsd:string">1</item>
					<item xsi:type="xsd:string">Turks and Caicos Islands</item>
					<item xsi:type="xsd:string">205</item>
				</item>
					<item SOAP-ENC:arrayType="xsd:string[3]" xsi:type="SOAP-ENC:Array">
					<item xsi:type="xsd:string">971</item>
					<item xsi:type="xsd:string">United Arab Emirates</item>
					<item xsi:type="xsd:string">209</item>
				</item>
				<item SOAP-ENC:arrayType="xsd:string[3]" xsi:type="SOAP-ENC:Array">
					<item xsi:type="xsd:string">972</item>
					<item xsi:type="xsd:string">Israel</item>
					<item xsi:type="xsd:string">102</item>
				</item>
				<item SOAP-ENC:arrayType="xsd:string[3]" xsi:type="SOAP-ENC:Array">
					<item xsi:type="xsd:string">973</item>
					<item xsi:type="xsd:string">Bahrain</item>
					<item xsi:type="xsd:string">17</item>
				</item>
			</return>
		</ns1:getDIDCountryResponse>
	</SOAP-ENV:Body>
</SOAP-ENV:Envelope