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, $messageWSDL, '</definitions>'));
现在生成wsdl的类有了，SoapDiscovery.class.php（源码在最末尾）。
再准备一个提供服务的Service.php类文件或者函数就可以创建wsdl了!
public function HelloWorld() { return "Hello";
}
public function Add($a, $b) { return $a + $b;
}
} ?>
创建wsdl文件的creat_wsdl.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）。 $disco->getWSDL();
运行create_wsdl.php文件，此时会生成一个Service.wsdl的文件
再在Service.php文件中添加一些代码
public function HelloWorld() { return "Hello";
}
public function Add($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：
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
View Code <?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>"; } } ?>