如何使用PHP实现一个WebService

<?php
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>‘);
    }
    
    /**
     * 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>";
    }
}
 
?>

<?php
    include("person.class.php");
    include("SoapDiscovery.class.php");
    
    //第一个参数是类名（生成的wsdl文件就是以它来命名的），即person类，第二个参数是服务的名字（这个可以随便写）。
    $disco = new SoapDiscovery(‘person‘,‘Person‘);
    $disco->getWSDL();
?>

<?php
    include("person.class.php");
    $objSoapServer = new SoapServer("person.wsdl");//person.wsdl是刚创建的wsdl文件
    //$objSoapServer = new SoapServer("server.php?wsdl");//这样也行
    $objSoapServer->setClass("person");//注册person类的所有方法
    $objSoapServer->handle();//处理请求
?>

<?php
    $client = new SoapClient("person.wsdl");
    //$client = new SoapClient("server.php?wsdl");//这样也行
    echo($client->say());
    echo "<br />";
    echo($client->run());
    echo "<br />";
?>