PHP实例：微信支付PHP SDK之微信公众号支付代码详解

<ul>
  <li style="background-color:#FF7F24"><a href="<?php echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'].'example/jsapi.php';?>">JSAPI支付</a></li>
  <li style="background-color:#698B22"><a href="<?php echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'].'example/micropay.php';?>">刷卡支付</a></li>
  <li style="background-color:#8B6914"><a href="<?php echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'].'example/native.php';?>">扫码支付</a></li>
  <li style="background-color:#CDCD00"><a href="<?php echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'].'example/orderquery.php';?>">订单查询</a></li>
  <li style="background-color:#CD3278"><a href="<?php echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'].'example/refund.php';?>">订单退款</a></li>
  <li style="background-color:#848484"><a href="<?php echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'].'example/refundquery.php';?>">退款查询</a></li>
  <li style="background-color:#8EE5EE"><a href="<?php echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'].'example/download.php';?>">下载订单</a></li>
</ul>

$logHandler= new CLogFileHandler("../logs/".date('Y-m-d').'.log');
$log = Log::Init($logHandler, 15);

$tools = new JsApiPay();
$openId = $tools->GetOpenid();

public function GetOpenid()
 {
 //通过code获得openid
 if (!isset($_GET['code'])){
  //触发微信返回code码
  $baseUrl = urlencode('http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].$_SERVER['QUERY_STRING']);
  $url = $this->__CreateOauthUrlForCode($baseUrl);
  Header("Location: $url");
  exit();
 } else {
  //获取code码,以获取openid
   $code = $_GET['code'];
  $openid = $this->getOpenidFromMp($code);
  return $openid;
 }
 }

$input = new WxPayUnifiedOrder();
$input->SetBody("test");
$input->SetAttach("test");
$input->SetOut_trade_no(WxPayConfig::MCHID.date("YmdHis"));
$input->SetTotal_fee("1");
$input->SetTime_start(date("YmdHis"));
$input->SetTime_expire(date("YmdHis", time() + 600));
$input->SetGoods_tag("test");
$input->SetNotify_url("http://paysdk.weixin.qq.com/example/notify.php");
$input->SetTrade_type("JSAPI");
$input->SetOpenid($openId);
$order = WxPayApi::unifiedOrder($input);
echo '<font color="#f00"><b>统一下单支付单信息</b></font><br/>';
printf_info($order);
$jsApiParameters = $tools->GetJsApiParameters($order);

$input->SetAttach("test");

$input->SetNotify_url(http://paysdk.weixin.qq.com/example/notify.php);

$input->SetNotify_url(dirname('http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']).'/notify.php');

//异步通知url未设置,则使用配置文件中的url
    if(!$inputObj->IsNotify_urlSet()){
      $inputObj->SetNotify_url(WxPayConfig::NOTIFY_URL);//异步通知url
    }

function jsApiCall()
 {
 WeixinJSBridge.invoke(
  'getBrandWCPayRequest',
  <?php echo $jsApiParameters; ?>,
  function(res){
  WeixinJSBridge.log(res.err_msg);
  alert(res.err_code+res.err_desc+res.err_msg);
  }
 );
 }
 function callpay()
 {
 if (typeof WeixinJSBridge == "undefined"){
   if( document.addEventListener ){
     document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
   }else if (document.attachEvent){
     document.attachEvent('WeixinJSBridgeReady', jsApiCall); 
     document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
   }
 }else{
   jsApiCall();
 }
 }

$notify = new PayNotifyCallBack();
$notify->Handle(false);

final public function Handle($needSign = true)
 {
 $msg = "OK";
 //当返回false的时候,表示notify中调用NotifyCallBack回调失败获取签名校验失败,此时直接回复失败
 $result = WxpayApi::notify(array($this, 'NotifyCallBack'), $msg);
 if($result == false){
  $this->SetReturn_code("FAIL");
  $this->SetReturn_msg($msg);
  $this->ReplyNotify(false);
  return;
 } else {
  //该分支在成功回调到NotifyCallBack办法,处理完成之后流程
  $this->SetReturn_code("SUCCESS");
  $this->SetReturn_msg("OK");
 }
 $this->ReplyNotify($needSign);
 }

$result = WxpayApi::notify(array($this, 'NotifyCallBack'), $msg);

public static function notify($callback, &$msg)
 {
 //获取通知的数据
 $xml = $GLOBALS['HTTP_RAW_POST_DATA'];
 //如果返回成功则验证签名
 try {
  $result = WxPayResults::Init($xml);
 } catch (WxPayException $e){
  $msg = $e->errorMessage();
  return false;
 }
 
 return call_user_func($callback, $result);
 }

return call_user_func($callback, $result);

$this->SetReturn_code("SUCCESS");
$this->SetReturn_msg("OK");

final private function ReplyNotify($needSign = true)
 {
 //如果必要签名
 if($needSign == true && 
  $this->GetReturn_code($return_code) == "SUCCESS")
 {
  $this->SetSign();
 }
 WxpayApi::replyNotify($this->ToXml());
 }
$this->GetReturn_code($return_code) == "SUCCESS")

$this->GetReturn_code() == "SUCCESS")

$input->SetAttach("test");