云自无心水自闲

一。安装amfphp,
1. 下载ampfphp1.2版本
2. 建立一个目录amfphp, 将包中的文件解压到此目录中。
3. 目录结构举例如下：
c:\amfphp\amf-core
c:\amfphp\browser
c:\amfphp\services
c:\amfphp\gateway.php
在Http Server中（可以是IIS，Apache Http Server）中建立一个虚拟目录，映射c:\amfphp
4. 验证
在浏览器中输入 http://localhost/amfphp/gateway.php
会看到一个成功页面。

二。编写PHP端代码
举个例子：定义一个sample类，这个类编写在sample.php中
其中定义一个getUsers方法
这个php文件放在amfphp\services\中。
<?php
// Create new service for PHP Remoting as Class
class sample
{
        function sample ()
        {
                // Define the methodTable for this class in the constructor
                $this->methodTable = array(
                                "getUsers" => array(
                                "description" => "Return a list of users",
                                "access" => "remote"
                        )
                );
        }

        function getUsers ($pUserName) {
                $mysql = mysql_connect(localhost, "username", "password");
                mysql_select_db( "sample" );
                //return a list of all the users
                $Query = "SELECT * from users";
                $Result = mysql_query( $Query );
                while ($row = mysql_fetch_object($Result)) {
                        $ArrayOfUsers[] = $row;
                }
                return( $ArrayOfUsers );
        }
}
?>
验证：
在浏览器中输入http://localhost/amfphp/browser/index.html
会发现在左边Frame中有一个sampe的链接，点击后，在右边Frame中可以测试此方法。

三。编写Flex端代码
首先写一个RemotingConnection类，继承自NetConnection,主要是用于统一指定编码格式
package
{
        import flash.net.NetConnection;
        import flash.net.ObjectEncoding;
        
        public class RemotingConnection extends NetConnection
        {
                public function RemotingConnection( sURL:String )
                {
                        objectEncoding = ObjectEncoding.AMF0;
                        if (sURL) connect( sURL );
                }
                
                public function AppendToGatewayUrl( s : String ) : void
                {
                }
        }
}
然后在应用中可以进行如下调用：
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns="*" creationComplete="initApplication()">
        <mx:DataGrid dataProvider="{dataProvider}">
                <mx:columns>
                                <mx:DataGridColumn headerText="Userid" dataField="userid"/>
                                <mx:DataGridColumn headerText="User Name" dataField="username"/>
                                <mx:DataGridColumn headerText="User Name" dataField="emailaddress"/>
                        </mx:columns>
        </mx:DataGrid>
        <mx:Script>
                <![CDATA[
                        import mx.controls.Alert;
                        [Bindable]
                        public var dataProvider:Array;
                        
                        import flash.net.Responder;
 
                        public var gateway : RemotingConnection;
                        
                        public function initApplication() : void
                        {
                                gateway = new RemotingConnection( "http://localhost/amfphp/gateway.php" );
                                gateway.call( "sample.getUsers", new Responder(onResult, onFault));
                        }
                
                        public function onResult( result : Array ) : void
                        {
                                dataProvider = result;
                                // mx.controls.Alert.show("result: " + result.toString());
                        }
                        
                        
                        public function onFault( fault : String ) : void
                        {
                                // trace( fault );
                                mx.controls.Alert.show(fault);
                        }
                ]]>
        </mx:Script>
</mx:Application>

补充说明：如果调用的PHP函数需要参数,比如：getUsers($user_name)
那么可以在Flex调用端，需要相应的添加此参数：
gateway.call( "sample.getUsers", new Responder(onResult, onFault), "<username>");