php中soap 的使用实例无需手写WSDL文件，提供自动生成WSDL文件类

http://www.cnblogs.com/phpdragon/archive/2012/06/10/2544171.html

最近工作的内容使用到了接口！

对于系统接口：

现下接触的有两种！

1、URL类型的接口

URL路由带参数式的接口！这个很好做！只要有过Web开发经验的人都能完成！

这种接口数据不够隐蔽性，可以直接在浏览其中看到，

如支付宝的交易请求URL。需要加一个MD5签名，和服务器端的再次向支付宝服务器发送验证！

虽然soap方式传递的数据隐蔽性很好!但为了数据安全，难免也需要进行数据签名。

2、SOAP类型的接口

无关编程语言、无关平台、扩展性很好

要实现一个SOAP 型的接口，有两种方式：一种有WSDL文件方式、一中无WSDL文件方式！

对于热爱研究型的人来说,使用第一种方式可以让你清楚的了解PHP是怎么创建了一个Web Service！

但第一种对于新手来说，创建一个XML格式的WSDL文件，是比较难的，这你的先了解熟悉什么是XML！

学会XML语法！

但对于一个急于解决问题的人来说！没有这么多的时间去熟悉！所以这是件烦恼的事！

不过不急，上面说了，还有一种无需WSDL文件的方式！而且，本讲解还提供了一个自动生成WSDL文件的类！

讲解前，先配置下PHP的soap环境支持：

找到php.ini文件

；extension=php_soap.dll

删除掉"；" ，重启apache服务器

一、有WSDL文件方式

在这里先介绍标准的webservice。

那么如何创建wsdl呢？对于PHP来说这确实是件很不容易的事情，有人说用zend studio创建很方便，这是一种方法。但对于那些不喜欢用zend studio的人来说，会觉得创建一个web service还要安装zend studio，太强人所难了。

在这里介绍一个简单的方法，到网上下载SoapDiscovery.class.php类，里面有个公用方法：getWSDL，这个方法末尾是用的return，那么，你修改一下这个方法：

//return sprintf('%s%s%s%s%s%s', $headerWSDL, $portTypeWSDL, $bindingWSDL, $serviceWSDL, $messageWSDL, '</definitions>');

//生成wsdl文件，将上面的return注释

$fso = fopen($this->class_name . ".wsdl" , "w");

fwrite($fso, sprintf('%s%s%s%s%s%s', $headerWSDL, $portTypeWSDL, $bindingWSDL, $serviceWSDL, $messageWSDL, '</definitions>'));

现在生成wsdl的类有了，SoapDiscovery.class.php（源码在最末尾）。

再准备一个提供服务的Service.php类文件或者函数就可以创建wsdl了!

<?php
class Service {

public function HelloWorld() {
return "Hello";
}

public function Add($a, $b) {
return $a + $b;
}

}
?>

　　创建wsdl文件的creat_wsdl.php

<?php

include("Service.php");
include("SoapDiscovery.class.php");

$disco = new SoapDiscovery('Service', 'soap'); //第一个参数是类名（生成的wsdl文件就是以它来命名的），即Service类，第二个参数是服务的名字（这个可以随便写）。
$disco->getWSDL();

　　运行create_wsdl.php文件，此时会生成一个Service.wsdl的文件

　　再在Service.php文件中添加一些代码

<?php

class Service {

public function HelloWorld() {
return "Hello";
}

public function Add($a, $b) {
return $a + $b;
}

}

$server = new SoapServer('Service.wsdl', array('soap_version' => SOAP_1_2));
$server->setClass("Service"); //注册Service类的所有方法
$server->handle(); //处理请求

?>

　　创建webservice客户端程序，测试webservice是否有效，文件名是：client.php

将以下内容拷贝进去：

　　

<?php

　ini_set('soap.wsdl_cache_enabled', "0"); //关闭wsdl缓存

$soap = new SoapClient('http://localhost/Dragon/soap/Service.php?wsdl');
　echo $soap->Add(28, 2);
echo $soap->__soapCall('Add',array(28,2))//或这样调用
　

　　OK！测试通过！

　　

二、无WSDL文件方式

　　服务器端

<?php
class Service
{
public function HelloWorld()
{
return  "Hello";
}
public  function Add($a,$b)
{
return $a+$b;
}
}
$server=new SoapServer(null,array('uri' => "abcd"));
$server->setClass("Service");
$server->handle();

　　　客户端

<?php
try {
$soap = new SoapClient(null, array(
"location" => "http://localhost/Dragon/soap/Service.php",
"uri" => "abcd", //资源描述符服务器和客户端必须对应
"style" => SOAP_RPC,
"use" => SOAP_ENCODED
));

echo $soap->Add(12, 2);
} catch (Exction $e) {
echo print_r($e->getMessage(), true);
}

　　

三．出现的问题。

1.在方法中对属性的赋值在其他方法中不起作用。

比如在客户端调用服务端某个方法对某个属性赋值。

在其他方法里就不能用。但在 __construct 方法中对属性的赋值是可以个在其他方法中使用的。

2. 提示 Client] looks like we got no XML document错误。

服务器端文件在<?php ?> 标签前后都不要有任何数据包括空格，空行。

3. Warning: SoapClient::SoapClient(): I/O warning : failed to load external entity

原因如下：PHP程序作为 SOAP客户端 采用 WSDL 模式访问远端服务器的时候，PHP是通过调用 libcurl 实现的。至少在 PHP5.2.X 是这样的。如果采用 non-WSDL 模式，就不需要 libcurl。除了 了ibcurl以外，至少还关联的库包括：libidn,ibgcc,libiconv,libintl,openssl

现在，你已经解决你了系统接口的问题了！剩下的空余时间，就有必要去了解什么是SOAP、http协议、XML了！

SoapDiscovery.class.php 文件

<?php

/**
* Copyright (c) 2005, Braulio Jos?Solano Rojas
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
*     Redistributions of source code must retain the above copyright notice, this list of
*     conditions and the following disclaimer.
*     Redistributions in binary form must reproduce the above copyright notice, this list of
*     conditions and the following disclaimer in the documentation and/or other materials
*     provided with the distribution.
*     Neither the name of the Solsoft de Costa Rica S.A. nor the names of its contributors may
*     be used to endorse or promote products derived from this software without specific
*     prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
* @version $Id$
* @copyright 2005
*/

/**
* SoapDiscovery Class that provides Web Service Definition Language (WSDL).
*
* @package SoapDiscovery
* @author Braulio Jos?Solano Rojas
* @copyright Copyright (c) 2005 Braulio Jos?Solano Rojas
* @version $Id$
* @access public
* */
class SoapDiscovery {

private $class_name = '';
private $service_name = '';

/**
* SoapDiscovery::__construct() SoapDiscovery class Constructor.
*
* @param string $class_name
* @param string $service_name
* */
public function __construct($class_name = '', $service_name = '') {
$this->class_name = $class_name;
$this->service_name = $service_name;
}

/**
* SoapDiscovery::getWSDL() Returns the WSDL of a class if the class is instantiable.
*
* @return string
* */
public function getWSDL() {
if (empty($this->service_name)) {
throw new Exception('No service name.');
}
$headerWSDL = "<?xml version=\"1.0\" ?>\n";
$headerWSDL.= "<definitions name=\"$this->service_name\" targetNamespace=\"urn:$this->service_name\" xmlns:wsdl=\"http://schemas.xmlsoap.org/wsdl/\" xmlns:soap=\"http://schemas.xmlsoap.org/wsdl/soap/\" xmlns:tns=\"urn:$this->service_name\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:SOAP-ENC=\"http://schemas.xmlsoap.org/soap/encoding/\" xmlns=\"http://schemas.xmlsoap.org/wsdl/\">\n";
$headerWSDL.= "<types xmlns=\"http://schemas.xmlsoap.org/wsdl/\" />\n";

if (empty($this->class_name)) {
throw new Exception('No class name.');
}

$class = new ReflectionClass($this->class_name);

if (!$class->isInstantiable()) {
throw new Exception('Class is not instantiable.');
}

$methods = $class->getMethods();

$portTypeWSDL = '<portType name="' . $this->service_name . 'Port">';
$bindingWSDL = '<binding name="' . $this->service_name . 'Binding" type="tns:' . $this->service_name . "Port\">\n<soap:binding style=\"rpc\" transport=\"http://schemas.xmlsoap.org/soap/http\" />\n";
$serviceWSDL = '<service name="' . $this->service_name . "\">\n<documentation />\n<port name=\"" . $this->service_name . 'Port" binding="tns:' . $this->service_name . "Binding\"><soap:address location=\"http://" . $_SERVER['SERVER_NAME'] . ':' . $_SERVER['SERVER_PORT'] . $_SERVER['PHP_SELF'] . "\" />\n</port>\n</service>\n";
$messageWSDL = '';
foreach ($methods as $method) {
if ($method->isPublic() && !$method->isConstructor()) {
$portTypeWSDL.= '<operation name="' . $method->getName() . "\">\n" . '<input message="tns:' . $method->getName() . "Request\" />\n<output message=\"tns:" . $method->getName() . "Response\" />\n</operation>\n";
$bindingWSDL.= '<operation name="' . $method->getName() . "\">\n" . '<soap:operation soapAction="urn:' . $this->service_name . '#' . $this->class_name . '#' . $method->getName() . "\" />\n<input><soap:body use=\"encoded\" namespace=\"urn:$this->service_name\" encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\" />\n</input>\n<output>\n<soap:body use=\"encoded\" namespace=\"urn:$this->service_name\" encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\" />\n</output>\n</operation>\n";
$messageWSDL.= '<message name="' . $method->getName() . "Request\">\n";
$parameters = $method->getParameters();
foreach ($parameters as $parameter) {
$messageWSDL.= '<part name="' . $parameter->getName() . "\" type=\"xsd:string\" />\n";
}
$messageWSDL.= "</message>\n";
$messageWSDL.= '<message name="' . $method->getName() . "Response\">\n";
$messageWSDL.= '<part name="' . $method->getName() . "\" type=\"xsd:string\" />\n";
$messageWSDL.= "</message>\n";
}
}
$portTypeWSDL.= "</portType>\n";
$bindingWSDL.= "</binding>\n";
//return sprintf('%s%s%s%s%s%s', $headerWSDL, $portTypeWSDL, $bindingWSDL, $serviceWSDL, $messageWSDL, '</definitions>');
//生成wsdl文件，将上面的return注释
$fso = fopen($this->class_name . ".wsdl", "w");
fwrite($fso, sprintf('%s%s%s%s%s%s', $headerWSDL, $portTypeWSDL, $bindingWSDL, $serviceWSDL, $messageWSDL, '</definitions>'));
}

/**
* SoapDiscovery::getDiscovery() Returns discovery of WSDL.
*
* @return string
* */
public function getDiscovery() {
return "<?xml version=\"1.0\" ?>\n<disco:discovery xmlns:disco=\"http://schemas.xmlsoap.org/disco/\" xmlns:scl=\"http://schemas.xmlsoap.org/disco/scl/\">\n<scl:contractRef ref=\"http://" . $_SERVER['SERVER_NAME'] . ':' . $_SERVER['SERVER_PORT'] . $_SERVER['PHP_SELF'] . "?wsdl\" />\n</disco:discovery>";
}

}

?>

=================================================================================

修正版：

根据YII 的CWsdlGenerator改变而来，

增加了接口参数的类型识别；

使用前需使用IDE对方法名进行注释，方可自动生成有效的WSDL文件。（具体原因可查看代码processMethod方法中的115行）



调用方法：

<?php

include(dirname(__FILE__) . './Service.class.php');

include(dirname(__FILE__) . './SoapDiscovery.class.php');
$disco = new SoapDiscovery();
$disco->getWSDL('service', 'http://www.xxx.com/service.php');

?>

<?php
/**
* CWsdlGenerator class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/ * @copyright Copyright © 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/ */

/**
* CWsdlGenerator generates the WSDL for a given service class.
*
* The WSDL generation is based on the doc comments found in the service class file.
* In particular, it recognizes the '@soap' tag in the comment and extracts
* API method and type definitions.
*
* In a service class, a remote invokable method must be a public method with a doc
* comment block containing the '@soap' tag. In the doc comment, the type and name
* of every input parameter and the type of the return value should be declared using
* the standard phpdoc format.
*
* CWsdlGenerator recognizes the following primitive types (case-sensitive) in
* the parameter and return type declarations:
* <ul>
* <li>str/string: maps to xsd:string;</li>
* <li>int/integer: maps to xsd:int;</li>
* <li>float/double: maps to xsd:float;</li>
* <li>bool/boolean: maps to xsd:boolean;</li>
* <li>date: maps to xsd:date;</li>
* <li>time: maps to xsd:time;</li>
* <li>datetime: maps to xsd:dateTime;</li>
* <li>array: maps to xsd:string;</li>
* <li>object: maps to xsd:struct;</li>
* <li>mixed: maps to xsd:anyType.</li>
* </ul>
*
* If a type is not a primitive type, it is considered as a class type, and
* CWsdlGenerator will look for its property declarations. Only public properties
* are considered, and they each must be associated with a doc comment block containg
* the '@soap' tag. The doc comment block should declare the type of the property.
*
* CWsdlGenerator recognizes the array type with the following format:
* <pre>
* typeName[]: maps to tns:typeNameArray
* </pre>
*
* The following is an example declaring a remote invokable method:
* <pre>
* / **
*   * A foo method.
*   * @param string name of something
*   * @param string value of something
*   * @return string[] some array
*   * @soap
*   * /
* public function foo($name,$value) {...}
* </pre>
*
* And the following is an example declaring a class with remote accessible properties:
* <pre>
* class Foo {
*     / **
*       * @var string name of foo
*       * @soap
*       * /
*     public $name;
*     / **
*       * @var Member[] members of foo
*       * @soap
*       * /
*     public $members;
* }
* </pre>
* In the above, the 'members' property is an array of 'Member' objects. Since 'Member' is not
* a primitive type, CWsdlGenerator will look further to find the definition of 'Member'.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id: CWsdlGenerator.php 2799 2011-01-01 19:31:13Z qiang.xue $
* @package system.web.services
* @since 1.0
*/
class SoapDiscovery {

/**
* @var string the namespace to be used in the generated WSDL.
* If not set, it defaults to the name of the class that WSDL is generated upon.
*/
public $namespace;

/**
* @var string the name of the generated WSDL.
* If not set, it defaults to "urn:{$className}wsdl".
*/
public $serviceName;
private $_operations;
private $_types;
private $_messages;

/**
* Generates the WSDL for the given class.
* @param string $className class name
* @param string $serviceUrl Web service URL
* @param string $encoding encoding of the WSDL. Defaults to 'UTF-8'.
* @return string the generated WSDL
*/
public function getWSDL($className, $serviceUrl, $encoding = 'UTF-8') {
$this->_operations = array();
$this->_types = array();
$this->_messages = array();
if ($this->serviceName === null)
$this->serviceName = $className;
if ($this->namespace === null)
$this->namespace = "urn:{$className}wsdl";

$reflection = new ReflectionClass($className);
foreach ($reflection->getMethods() as $method) {
if ($method->isPublic())
$this->processMethod($method);
}

//return $this->buildDOM($serviceUrl, $encoding)->saveXML();

$fso = fopen($this->serviceName . ".wsdl", "w");
fwrite($fso, $this->buildDOM($serviceUrl, $encoding)->saveXML());
}

/*
* @param ReflectionMethod $method method
*/

private function processMethod($method) {
$comment = $method->getDocComment();

if (strpos($comment, '@soap') === false)
return;

$methodName = $method->getName();
$comment = preg_replace('/^\s*\**(\s*?$|\s*)/m', '', $comment);
$params = $method->getParameters();
$message = array();
$n = preg_match_all('/^@param\s+([\w\.]+(\[\s*\])?)\s*?(.*)$/im', $comment, $matches);

if ($n > count($params))
$n = count($params);
for ($i = 0; $i < $n; ++$i)
$message[$params[$i]->getName()] = array($this->processType($matches[1][$i]), trim($matches[3][$i])); // name => type, doc

$this->_messages[$methodName . 'Request'] = $message;

if (preg_match('/^@return\s+([\w\.]+(\[\s*\])?)\s*?(.*)$/im', $comment, $matches))
$return = array($this->processType($matches[1]), trim($matches[2])); // type, doc
else
$return = null;

$this->_messages[$methodName . 'Response'] = array('return' => $return);

if (preg_match('/^\/\*+\s*([^@]*?)\n@/s', $comment, $matches))
$doc = trim($matches[1]);
else
$doc = '';
$this->_operations[$methodName] = $doc;
}

/*
* @param string $type PHP variable type
*/

private function processType($type) {
static $typeMap = array(
'string' => 'xsd:string',
'str' => 'xsd:string',
'int' => 'xsd:int',
'integer' => 'xsd:integer',
'float' => 'xsd:float',
'double' => 'xsd:float',
'bool' => 'xsd:boolean',
'boolean' => 'xsd:boolean',
'date' => 'xsd:date',
'time' => 'xsd:time',
'datetime' => 'xsd:dateTime',
'array' => 'soap-enc:Array',
'object' => 'xsd:struct',
'mixed' => 'xsd:anyType',
);
if (isset($typeMap[$type]))
return $typeMap[$type];
else if (isset($this->_types[$type]))
return is_array($this->_types[$type]) ? 'tns:' . $type : $this->_types[$type];
else if (($pos = strpos($type, '[]')) !== false) { // if it is an array
$type = substr($type, 0, $pos);
if (isset($typeMap[$type]))
$this->_types[$type . '[]'] = 'xsd:' . $type . 'Array';
else {
$this->_types[$type . '[]'] = 'tns:' . $type . 'Array';
$this->processType($type);
}
return $this->_types[$type . '[]'];
}
}

/*
* @param string $serviceUrl Web service URL
* @param string $encoding encoding of the WSDL. Defaults to 'UTF-8'.
*/

private function buildDOM($serviceUrl, $encoding) {
$xml = "<?xml version=\"1.0\" encoding=\"$encoding\"?>
<definitions name=\"{$this->serviceName}\" targetNamespace=\"{$this->namespace}\"
xmlns=\"http://schemas.xmlsoap.org/wsdl/\"
xmlns:tns=\"{$this->namespace}\"
xmlns:soap=\"http://schemas.xmlsoap.org/wsdl/soap/\"
xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\"
xmlns:wsdl=\"http://schemas.xmlsoap.org/wsdl/\"
xmlns:soap-enc=\"http://schemas.xmlsoap.org/soap/encoding/\"></definitions>";

$dom = new DOMDocument();
$dom->loadXml($xml);
$this->addTypes($dom);

$this->addMessages($dom);
$this->addPortTypes($dom);
$this->addBindings($dom);
$this->addService($dom, $serviceUrl);

return $dom;
}

/*
* @param DOMDocument $dom Represents an entire HTML or XML document; serves as the root of the document tree
*/

private function addTypes($dom) {
if ($this->_types === array())
return;
$types = $dom->createElement('wsdl:types');
$schema = $dom->createElement('xsd:schema');
$schema->setAttribute('targetNamespace', $this->namespace);
foreach ($this->_types as $phpType => $xmlType) {
if (is_string($xmlType) && strrpos($xmlType, 'Array') !== strlen($xmlType) - 5)
continue;  // simple type
$complexType = $dom->createElement('xsd:complexType');
if (is_string($xmlType)) {
if (($pos = strpos($xmlType, 'tns:')) !== false)
$complexType->setAttribute('name', substr($xmlType, 4));
else
$complexType->setAttribute('name', $xmlType);
$complexContent = $dom->createElement('xsd:complexContent');
$restriction = $dom->createElement('xsd:restriction');
$restriction->setAttribute('base', 'soap-enc:Array');
$attribute = $dom->createElement('xsd:attribute');
$attribute->setAttribute('ref', 'soap-enc:arrayType');
$attribute->setAttribute('wsdl:arrayType', substr($xmlType, 0, strlen($xmlType) - 5) . '[]');
$restriction->appendChild($attribute);
$complexContent->appendChild($restriction);
$complexType->appendChild($complexContent);
}
else if (is_array($xmlType)) {
$complexType->setAttribute('name', $phpType);
$all = $dom->createElement('xsd:all');
foreach ($xmlType as $name => $type) {
$element = $dom->createElement('xsd:element');
$element->setAttribute('name', $name);
$element->setAttribute('type', $type[0]);
$all->appendChild($element);
}
$complexType->appendChild($all);
}
$schema->appendChild($complexType);
$types->appendChild($schema);
}

$dom->documentElement->appendChild($types);
}

/*
* @param DOMDocument $dom Represents an entire HTML or XML document; serves as the root of the document tree
*/

private function addMessages($dom) {
foreach ($this->_messages as $name => $message) {
$element = $dom->createElement('wsdl:message');
$element->setAttribute('name', $name);
foreach ($this->_messages[$name] as $partName => $part) {
if (is_array($part)) {
$partElement = $dom->createElement('wsdl:part');
$partElement->setAttribute('name', $partName);
$partElement->setAttribute('type', $part[0]);
$element->appendChild($partElement);
}
}
$dom->documentElement->appendChild($element);
}
}

/*
* @param DOMDocument $dom Represents an entire HTML or XML document; serves as the root of the document tree
*/

private function addPortTypes($dom) {
$portType = $dom->createElement('wsdl:portType');
$portType->setAttribute('name', $this->serviceName . 'PortType');
$dom->documentElement->appendChild($portType);
foreach ($this->_operations as $name => $doc)
$portType->appendChild($this->createPortElement($dom, $name, $doc));
}

/*
* @param DOMDocument $dom Represents an entire HTML or XML document; serves as the root of the document tree
* @param string $name method name
* @param string $doc doc
*/

private function createPortElement($dom, $name, $doc) {
$operation = $dom->createElement('wsdl:operation');
$operation->setAttribute('name', $name);

$input = $dom->createElement('wsdl:input');
$input->setAttribute('message', 'tns:' . $name . 'Request');
$output = $dom->createElement('wsdl:output');
$output->setAttribute('message', 'tns:' . $name . 'Response');

$operation->appendChild($dom->createElement('wsdl:documentation', $doc));
$operation->appendChild($input);
$operation->appendChild($output);

return $operation;
}

/*
* @param DOMDocument $dom Represents an entire HTML or XML document; serves as the root of the document tree
*/

private function addBindings($dom) {
$binding = $dom->createElement('wsdl:binding');
$binding->setAttribute('name', $this->serviceName . 'Binding');
$binding->setAttribute('type', 'tns:' . $this->serviceName . 'PortType');

$soapBinding = $dom->createElement('soap:binding');
$soapBinding->setAttribute('style', 'rpc');
$soapBinding->setAttribute('transport', 'http://schemas.xmlsoap.org/soap/http');
$binding->appendChild($soapBinding);

$dom->documentElement->appendChild($binding);

foreach ($this->_operations as $name => $doc)
$binding->appendChild($this->createOperationElement($dom, $name));
}

/*
* @param DOMDocument $dom Represents an entire HTML or XML document; serves as the root of the document tree
* @param string $name method name
*/

private function createOperationElement($dom, $name) {
$operation = $dom->createElement('wsdl:operation');
$operation->setAttribute('name', $name);
$soapOperation = $dom->createElement('soap:operation');
$soapOperation->setAttribute('soapAction', $this->namespace . '#' . $name);
$soapOperation->setAttribute('style', 'rpc');

$input = $dom->createElement('wsdl:input');
$output = $dom->createElement('wsdl:output');

$soapBody = $dom->createElement('soap:body');
$soapBody->setAttribute('use', 'encoded');
$soapBody->setAttribute('namespace', $this->namespace);
$soapBody->setAttribute('encodingStyle', 'http://schemas.xmlsoap.org/soap/encoding/');
$input->appendChild($soapBody);
$output->appendChild(clone $soapBody);

$operation->appendChild($soapOperation);
$operation->appendChild($input);
$operation->appendChild($output);

return $operation;
}

/*
* @param DOMDocument $dom Represents an entire HTML or XML document; serves as the root of the document tree
* @param string $serviceUrl Web service URL
*/

private function addService($dom, $serviceUrl) {
$service = $dom->createElement('wsdl:service');
$service->setAttribute('name', $this->serviceName . 'Service');

$port = $dom->createElement('wsdl:port');
$port->setAttribute('name', $this->serviceName . 'Port');
$port->setAttribute('binding', 'tns:' . $this->serviceName . 'Binding');

$soapAddress = $dom->createElement('soap:address');
$soapAddress->setAttribute('location', $serviceUrl);
$port->appendChild($soapAddress);
$service->appendChild($port);
$dom->documentElement->appendChild($service);
}

}