How to connect to non-wsdl API via SoapClient in PHP? -

i trying connect php application connectwise api. never used soapclient lost after looking on soapclient manual

here request should when sent connectwise

post /v4_6_release/apis/2.0/serviceticketapi.asmx http/1.1 host: cw.connectwise.net content-type: text/xml; charset=utf-8 content-length: length soapaction: "http://connectwise.com/getserviceticket"  <?xml version="1.0" encoding="utf-8"?> <soap:envelope xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns:xsd="http://www.w3.org/2001/xmlschema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">   <soap:body>     <getserviceticket xmlns="http://connectwise.com">       <credentials>         <companyid>string</companyid>         <integratorloginid>string</integratorloginid>         <integratorpassword>string</integratorpassword>       </credentials>       <ticketid>int</ticketid>     </getserviceticket>   </soap:body> </soap:envelope> 

how can use soapclient establish connection , send required information?

here have done far

error_reporting(e_all); ini_set('display_errors',1);   $client = new soapclient(     null,     array(         'location' => 'http://connectwise.com/getserviceticket',         'uri' => 'http://connectwise.com',         'trace' => 1,         'use' => soap_literal,         'style' => soap_document,     ) );   $params = new soapvar(' <credentials>                         <companyid>mycompany</companyid>                         <integratorloginid>myusername</integratorloginid>                         <integratorpassword>mypassword</integratorpassword>                         </credentials>                         <ticketid>123</ticketid>', xsd_anyxml);       echo "request:<br>" . htmlentities(str_ireplace('><', ">\n<", $client->__getlastrequest())) . '<br><br>';  echo "response:<br>" . htmlentities(str_ireplace('><', ">\n<", $client->__getlastresponse())) . '<br>'; 

but not printed beside

request:   response: