ws_ticketget.php

<?php

//First you need to create this webservice: http://pastebin.com/fSWiZ0Ay

$url = "https://myotrs.example.com/otrs/nph-genericinterface.pl/Webservice/GenericTicketConnector/";
$namespace = "generic";
$username = "myotrsUser";
$password = "myotrsSecret";

$client = new SoapClient(
        null,
        array(
            'location' => $url,
            'uri' => $namespace,
            'trace' => 1,
            'style' => SOAP_RPC,
            'use' => SOAP_ENCODED,
        )
    );

echo "Connection:\n";
var_dump($client);


//OTRS web service parameters described here:
//https://otrs.github.io/doc/manual/admin/3.3/en/html/genericinterface.html#genericinterface-bundled-connectors
$TicketDetails = $client->__soapCall("TicketGet",
        array(
            new SoapParam($username, "UserLogin"),
            new SoapParam($password, "Password"),
            new SoapParam(12345678, "TicketID"),
            new SoapParam(1, "DynamicFields"),
            new SoapParam(1, "AllArticles"),
        )
    );

echo "\n\nOutput:\n";
var_dump($TicketDetails);