初学iPhone开发,经过反复多次验证,结合下面2个教程:
http://ameyashetti.wordpress.com/2009/07/31/apple-push-notification-service-tutorial/
http://www.macoscoders.com/2009/05/17/iphone-apple-push-notification-service-apns/

得出从零开始的php版push服务器搭建流程:
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0.在Mac OS X机器上安装好XCode, 连接一台正常的iPhone, 保持平和的心态

APP 开发基础设置
1.在iPhone Provisioning Portal中建立好APP ID和Device.
2.在Keychain Access.app中生成证书请求CertificateSigningRequest.certSigningRequest(菜单 > Keychain Access > Certificate Assistant > Request a Certificate From a Certificate Authority...).
3.在iPhone Provisioning Portal > Certificates中请求一个证书(点击Request Certificate,上传CertificateSigningRequest.certSigningRequest).
4.请求完成后,将证书文件(developer_identity.cer)下载,双击导入到Key Chain中.
5.在iPhone Provisioning Portal > Provisioning 中,新建一个Profile, 选择指定的APP ID和 Devices后生成.
6.将刚刚生成的Profile下载为*_profile.mobileprovision, 双击该文件, 将profile加载到iPhone中.

Push Notification service设置
7.在iPhone Provisioning Portal > App IDs,选择需要Push服务的App ID, 进入Configure.
8.确认 Enable for Apple Push Notification service ,配置 Development Push SSL Certificate, 上传第2步生成的证书请求.
9.下载生成的aps_developer_identity.cer, 完成Push服务配置.
10.双击aps_developer_identity.cer,保存到Key Chain.

生成php Push Notification sender需要的证书文件
11.在Keychain Access.app里选定这个新证书(Apple Development Push Services*),导出到桌面,保存为Certificates.p12.
12.运行如下命令:

复制代码     openssl pkcs12 -clcerts -nokeys -out cert.pem -in Certificates.p12     openssl pkcs12 -nocerts -out key.pem -in Certificates.p12     openssl rsa -in key.pem -out key.unencrypted.pem     cat cert.pem key.unencrypted.pem > ck.pem

获得php Push Notification sender所需的设备令牌:
13.新建一个View-based Application项目,在$PROJECT_NAMEAppDelegate.m中:
a.粘贴如下代码:

复制代码 - (void)applicationDidFinishLaunching:(UIApplication *)app {     // other setup tasks here….     [window addSubview:viewController.view];     [self alertNotice:@"" withMSG:@"Initiating Remote Noticationss Are Active" cancleButtonTitle:@"Ok" otherButtonTitle:@""];     [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge |UIRemoteNotificationTypeSound)]; } - (void)application:(UIApplication *)app didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {     //NSLog(@"devToken=%@",deviceToken);     [self alertNotice:@"" withMSG:[NSString stringWithFormat:@"devToken=%@",deviceToken] cancleButtonTitle:@"Ok" otherButtonTitle:@""]; } - (void)application:(UIApplication *)app didFailToRegisterForRemoteNotificationsWithError:(NSError *)err {     NSLog(@"Error in registration. Error: %@", err);     [self alertNotice:@"" withMSG:[NSString stringWithFormat:@"Error in registration. Error: %@", err] cancleButtonTitle:@"Ok" otherButtonTitle:@""]; } -(void)alertNotice:(NSString *)title withMSG:(NSString *)msg cancleButtonTitle:(NSString *)cancleTitle otherButtonTitle:(NSString *)otherTitle{     UIAlertView *alert;     if([otherTitle isEqualToString:@""])         alert = [[UIAlertView alloc] initWithTitle:title message:msg delegate:self cancelButtonTitle:cancleTitle otherButtonTitles:nil,nil];     else         alert = [[UIAlertView alloc] initWithTitle:title message:msg delegate:self cancelButtonTitle:cancleTitle otherButtonTitles:otherTitle,nil];     [alert show];     [alert release]; }

b.在 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 方法中增加

复制代码     [self alertNotice:@"" withMSG:@"Initiating Remote Noticationss Are Active" cancleButtonTitle:@"Ok" otherButtonTitle:@""];     [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge |UIRemoteNotificationTypeSound)];

14.项目设置
a.Targets > $APP_NAME > context menu > Properties > Identifier
    修改 identifier 为App ID
b.Targets > $APP_NAME > context menu > Build > Code Signing > Code Signing Identifier > Any iPhone OS Device
    指定 iPhone Developer 为开发用机
15.编译并运行后会在iPhone上显示设备令牌

16.php Push Notification sender代码如下:

复制代码 <?php $deviceToken = "设备令牌"; $body = array("aps" => array("alert" => 'message', "badge" => 1, "sound" => 'received5.caf')); $ctx = stream_context_create(); stream_context_set_option($ctx, "ssl", "local_cert", "ck.pem"); $fp = stream_socket_client("ssl://gateway.sandbox.push.apple.com:2195", $err, $errstr, 60, STREAM_CLIENT_CONNECT, $ctx); if (!$fp) {     print "Failed to connect $err $errstrn";     return; } print "Connection OK\n"; $payload = json_encode($body); $msg = chr(0) . pack("n",32) . pack("H*", $deviceToken) . pack("n",strlen($payload)) . $payload; print "sending message :" . $payload . "\n"; fwrite($fp, $msg); fclose($fp); ?>

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希望各位高手能指正这流程中遗漏或不清楚的地方.

第一个问题:
我知道 Push 服务实际上是向APNS发送一个附带证书的ssl请求, 由APNS来通知iPhone.
上面例子中,php发送请求时将设备令牌和证书一并发送给APNS,我想知道有没有办法能更轻松的得到设备令牌.

第二个问题:
如果我的APP发布之后,要在 iPhone Provisioning Portal 中启用 Production Push SSL Certificate(开发时用的是Development Push SSL Certificate),
这两种证书状态时的令牌是一样的么.
如果我同时启用了两个证书, php给APNS发请求时,APNS会接受哪一个呢?