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PHP的SOAP原理及实现详解

Jun 20, 2016 pm 01:00 PM
php

PHP的SOAP原理及实现

1. 简介:

SOAP : (全称Simple Object Access Protocol) 为交换数据的一种协议规范,该通信协议位于HTTP之上,以XML格式语言进行数据互换,使用场景:如果各项目之间使用不用的开发语言要进行数据互换,就需要一个互相都能通信的工具,WSDL,SOAP为此诞生

 

WSDL: WSDL 指网络服务描述语言 (Web Services Description Language),WSDL 是一种使用 XML 编写的文档。这种文档可描述某个 Web service。它可规定服务的位置,以及此服务提供的操作(或方法)。

 

2. 配置:

PHP的SOAP扩展开启及配置

WIn环境

打开PHP.ini   extension=php_soap.dll去掉前面的分号

Linux环境

编译时加上   --enable-soap

WSDL缓存类型 1为磁盘   2为内存

soap.wsdl_cache = 1

缓存文件保存位置

soap.wsdl_cache_dir = /tmp

开启或关闭WSDL缓存功能,由于每次进行SOAP都会有下载对方XML文档的过程,也是其效率低下的原因

soap.wsdl_cache_enabled =1

缓存文件的最大数量

soap.wsdl_cache_limit

缓存文件生存时间

soap.wsdl_cache_ttl = 3600

 

3. 应用实例:

a. 不使用wsdl的情况

服务端:

<span style="font-size:18px;"><?php class testclass{
	
	public function getName($name)
	{
		return "hello ".$name;
	}
}


function getName($name)
{
	return "hello ".$name;
}

$a = new SoapServer(null,array("uri"=>"index.php"));
$a->setClass("testclass");  //指定一个类中的所有方法
//$a->addFunction("test");  //指定单个方法
$a->handle();   //处理访问</span>
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uri为必填项,客户端的uri必须和服务端的保持一致

客户端

 

<span style="font-size:18px;">try{
	$client = new SoapClient(null, array("location"=>"http://localhost/instance/index.php","uri"=>"index.php"));
	//echo $client->getName("getName");          //调用方法
	echo $client->__soapCall ("getName",array("name"));    //调用方法
	
}catch(Exception $e){
	print_r($e->getMessage(),true);
}</span>
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location为SOAP服务端访问地址,uri与服务端保持一致

 

b. 使用WSDL方法

 

因使用wsdl之前需要手动生成xml文件,手写的话太过繁琐,可使用SoapDiscovery.class.php 开源类生成

下载地址 

<span style="font-size:18px;"><?php class testclass{

	public function getName($name)
	{
		return "hello ".$name;
	}
}

include_once "SoapDiscovery.class.php";

$discovery = new SoapDiscovery("testclass","testclass");
$filename = $discovery->getWSDL(); //生成XML文件
echo $filename;</span>
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服务端

<span style="font-size:18px;">$a = new SoapServer("testclass.wsdl");
$a->setClass("testclass");  //指定一个类中的所有方法
$a->handle();   //处理访问 </span>
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客户端

<span style="font-size:18px;">try{
	$client = new SoapClient("http://localhost/instance/index.php?wsdl");
	//echo <span style="font-family:Arial,Helvetica,sans-serif">$client</span>->getName("getName");
	//echo <span style="font-family:Arial,Helvetica,sans-serif">$client</span><span style="font-family:Arial,Helvetica,sans-serif">->__soapCall ("getName",array("name"));</span>
	print_r(<span style="font-family:Arial,Helvetica,sans-serif">$client</span><span style="font-family:Arial,Helvetica,sans-serif">->__getFunctions()); //打印服务端所有提供的方法</span></span>
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<span style="font-size:18px;">}catch(Exception $e){
	print_r($e->getMessage(),true);
}</span>
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扩展类所提供的方法可参考PHP Manual


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