soap.class.php

<?php
namespace App;

/**
 * Esta classe é apenas um Wrapper para a classe SoapClient e realiza as requisições e recebe as respostas de forma padrão.
 */
class Soap {

	public
		$__client,
		$__server;

	private
		$wsdl_url;

	private
		$__server_name = 'cbl',
		$__namespace = APP_URL . 'wsdl/index.php',
		$__wsdl_valid_xml = APP_URL . 'wsdl/wsdl.xml';

	public function __construct($new_wsdl_url = null) {
		if (null === WSDL_URL && empty($new_wsdl_url)) {
			throw new \Exception("A URL do WEBService não foi definida.", 1);
		}

		if (!empty($new_wsdl_url)) {
			$this->wsdl_url = $new_wsdl_url;
		} else {
			$this->wsdl_url = WSDL_URL;
		}
	}

	/**
	 * Client
	 * -- for self test
	 */

	public function newClient() {
		//$this->__client = new \SoapClient($this->wsdl_url, array('cache_wsdl' => WSDL_CACHE_NONE, 'trace' => 0));
		$this->__client = new \nusoap_client($this->wsdl_url, 'wsdl');

		return $this->__client;
	}

	public function request($function = null, $params = null) {

		if (!empty($function)) {
			//return $this->__client->__soapCall($function, $params);
			return $this->__client->call($function, $params);
		}

		throw new \Exception("Defina um método correto para ser chamado.", 1);
	}

	/**
	 * Configure a new WSL Server
	 */

	public function configureServer() {

		$this->__server = new \nusoap_server();
		$this->__server->soap_defencoding = 'ISO-8859-1';
		$this->__server->decode_utf8 = true;

		$this->__server->configureWSDL($this->__server_name, $this->__namespace);
		$this->__server->wsdl->schemaTargetNamespace = $this->__namespace;

		return $this->__server;
	}

	/**
	 * Register the functions as services of the webservice. First, call 'configureServer()', after, call 'serviceRegister()' to any module that you want to attach to Webservice WSDL.
	 * @param  array  $params The options to configure the module.
	 * Expected:
	 * - string function_name
	 * - array function_params
	 * - array function_return_values
	 * - string soap_action
	 * - string description
	 */
	public function serviceRegister($params = array()) {
		if (empty($params)) {
			throw new \Exception("Os parâmetros para registrar o método não foram definidos.", 1);
		}

		$this->__server->register(
			$params['function_name'],
			$params['function_params'],
			$params['function_return_values'],
			$this->__namespace,
			$this->__namespace.'#'.$params['soap_action'],
			'rpc',
			'encoded',
			$params['description']
		);

	}

	/**
	 * "Start the server" already configured capturing the data received from a Client call.
	 * @return [type] [description]
	 */
	public function startServer() {
		# HTTP_RAW_POST_DATA are ALL THE POST DATA received that are not treated.

		$__http_raw_post_data = file_get_contents("php://input");
		$this->__server->service($__http_raw_post_data);
	}



	public function debug() {

        $_request = $this->__client->request;
        $_response = $this->__client->response;

        echo '<h2>Request</h2>';
        echo '<pre>' .htmlspecialchars($_request, ENT_QUOTES).'</pre>';
        echo '<h2>Response</h2>';
        echo '<pre>' .htmlspecialchars($_response, ENT_QUOTES).'</pre>';

        $error = $this->__client->getError();
        if ($error) {
            echo "<h2>Constructor error</h2><pre>" . $error . "</pre>";
        }

        if ($this->__client->fault) {
            echo "<h2>Fault</h2><pre>";
            echo ($response);
            echo "</pre>";
        }

        else {
            $error = $this->__client->getError();

            if ($error) {
                echo "<h2>Error</h2><pre>" . $error . "</pre>";
            }

            if (isset($response) && !empty($response)){
                echo "<h2>Respond</h2><pre>";
                print_r ($response);
                echo "</pre>";
            }
        }
	}

	public function __destruct() {
		//unset($this->__client);
		//unset($this->__server);
	}
}

what is WSDL_URL in that ?

That is the SOAP endpoint.

ok

This is an old project, but I've just updated the source for this latest version. This is just a wrapper class for using this package installed by composer: https://github.com/codecasts/nusoap-php7. This is a script that I used to test: https://gist.github.com/marcosfreitas/e0b18b94309ee02323a6a5fa066d8e8f