soap_client_sample.php

<?php
  try {
      $wsUrl = "HTTP://URL_COMPLETA_DO_WEBSERVICE?WSDL"; // normalmente as URLs de WS contém esse `?WSDL` no final...

      $clientSoap = new SoapClient($wsUrl, array(
          'features' => SOAP_SINGLE_ELEMENT_ARRAYS,
          "trace" => true,
          "encoding" => "utf-8",
          "exceptions" => true,
          "connection_timeout" => 120,
          "cache_wsdl" => WSDL_CACHE_NONE,
      ));

      $result = $clientSoap->NOME_DO_METODO_DISPONIBILIZADO(array("PARAMETRO" => "VALOR"));
      print_r($result);
  } catch(SoapFault $ex) {
      print_r($ex); // erro na tentativa de consumo
  }