通过WebService,我们可以调用部署在其它地方的程序,而不用关心被调用的程序是在什么平台用什么语言编写的。这里我们使用php调用。

  在php4时代调用WebService大部分使用的nusoap,到了php5已经有了自己的soap扩展,我们只需要在php的配置文件php.ini开启扩展  

  extension = php_soap.dll

  

实例程序

   定义一个实现业务逻辑的类文件basic.php

//测试定义公开的类
class Mywsdl {
private $nombre = '';
public function __construct($name = 'World')
{
$this->name = $name;
}
public function greet($name = '')
{
$name = $name?$name:$this->name;
return 'Hello '.$name.'.';
}
public function serverTimestamp()
{
return time();
}
public function myfunc($a=''){
$arr = array('a'=>$a,'b'=>$a,'c'=>$a);
return json_encode($arr); }
}

  一个类,返回一个字符串。假设这个程序在服务器A上面,如果想在服务器B上面调用这个程序怎么办?首先我们先要将这个类变成Web的服务,这就需要用到前面PHP的soap扩展了。

  创建服务server.php,需要使用到的SoapDiscovery.class.php文件

require_once('basic.php');

//define('WSDL_URL','hello.wsdl');        //定义WSDL文件路径
ini_set('soap.wsdl_cache_enabled','0'); //关闭WSDL缓存 //WSDL文件不存在时自动创建
if(!file_exists('Mywsdl.wsdl'))
{
require_once 'SoapDiscovery.class.php';
$disco = new SoapDiscovery('Mywsdl','www.zhuoqu.com');
$str = $disco->getWSDL();
} //SOAP开启并接收Client传入的参数响应
$server = new SoapServer('Mywsdl.wsdl',array('soap_version' => SOAP_1_2));
$server->setClass('Mywsdl');
$server->handle();

  OK,一个web服务搭建好了,上面的例子中,我们创建了一个SoapServer对象,人后利用setClass函数将我们刚才编写的basic类set进去,最后 handle()。现在如果用浏览器访问这个文件,会出现警告,这是正常的,因为这个文件不是用浏览器访问的,而是用另一个程序访问的。当一个客户端程序访问我们的webService时,运行到handle() 时会对客户端的输入进行处理,并输出结果给客户端,这里需要注意一下,不要在handle() 之前和之后输出任何东西,否者客户端会处理不了。

  现在,编写客户端访问我们的webservice

 

$client = new SoapClient("http://127.0.0.1/s.php?wsdl");

try {
$result = $client->myfunc('789');
var_dump(json_decode($result));
echo "The answer is result";
}
catch (SoapFault $e){
echo "Error Message: {$e->getMessage()}";
}

  这样我们就可以通过访问客户端文件来获取我们需要的结果了

  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"; /**
* 2017-01-16 17:35:12
* author SUR
*/
$file = fopen($this->class_name.'.wsdl','w');
fwrite($file,sprintf('%s%s%s%s%s%s', $headerWSDL, $portTypeWSDL, $bindingWSDL, $serviceWSDL, $messageWSDL, '</definitions>')) ;
fclose($file);
} /**
* 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>";
}
} ?>

  

   来源   http://www.open-open.com/doc/view/fb5af38feff2470da22458e31c2087b1

        http://www.360doc.com/content/11/0212/16/15103_92457365.shtml

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