微信JSAPI支付(比较详细) 关于getRrandWCPayRequest:fail_invalid appid 错误

AppID(应用ID) :wx000000000 （来自微信公众平台-》开发者中心-》配置项-》开发者ID-》AppID(应用ID)）AppSecret(应用密钥) :62d0000000000000000000ae （来自微信公众平台-》开发者中心-》配置项-》开发者ID-》AppSecret(应用密钥)）商户号:0000000 (来自微信支付商户平台-》帐号设置 -》帐号信息-》基本帐号信息-》微信支付商户号：00000000 （小知：纯数字）)商户密钥： :0c8300000000000000000b （来自您申请微信支付商户平台时发送到你邮件里的一串码，若丢失，可重新申请，步骤：商户平台-》帐户设置-》API安全-》API密钥-》右下角有“设置密钥”）

header("Content-type: text/html; charset=utf-8");
$wx = new wxpay();
$payment = array(
'wxpay_AppSecret' => '0c830a000000000f12b0b',//（来自您申请微信支付商户平台时发送到你邮件里的一串码，若丢失，可重新申请，步骤：商户平台-》帐户设置-》API安全-》API密钥-》右下角有“设置密钥”）
'wxpay_AppID' => 'wx00000000b30',//（来自微信公众平台-》开发者中心-》配置项-》开发者ID-》AppID(应用ID)）
'wxpay_shanghuID' => '120000102',//(来自微信支付商户平台-》帐号设置 -》帐号信息-》基本帐号信息-》微信支付商户号：00000000 （小知：纯数字）)
);
$order = array(
'order_sn' => '201505191450',//这是订单SN
'order_amount' => 0.01, //金额
);
$openid = 'oT0000000000000000GNkNM3s';//此OPENID是微信的唯一标识，需用API获得，此贴按下不表，择日发贴
$notify_url = "http://m.sgfoot.com/auth/respond.php";//必须是授权目录http://m.sgfoot.com/auth/
echo $wx->get_code($openid, $order, $payment);
/**
* 微信支付类
*/
class wxpay
{ var $parameters; // cft 参数
var $payment; // 配置信息
/**
* 生成支付代码
*
* @param array $order
* 订单信息
* @param array $payment
* 支付方式信息
*/
function get_code($openid, $order, $payment, $notify_url)
{
// 配置参数
$this->payment = $payment; //设置必填参数
//根目录url
$out_trade_no = $order['order_sn'] . 'o' . rand(1, 100);
$this->setParameter('body', $order['order_sn']);
$this->setParameter("openid", "{$openid}");//用户唯一标识
$this->setParameter("out_trade_no", $out_trade_no);//商户订单号
$this->setParameter("total_fee", $order['order_amount'] * 100);//总金额
$this->setParameter("notify_url", "{$notify_url}");//通知地址
$this->setParameter("trade_type", "JSAPI");//交易类型 $prepay_id = $this->getPrepayId();
$jsApiParameters = $this->getParameters($prepay_id);
// wxjsbridge
$js = '<script type="text/javascript">
function jsApiCall(){WeixinJSBridge.invoke("getBrandWCPayRequest",'.$jsApiParameters.',function(res){if(res.err_msg == "get_brand_wcpay_request:ok"){location.href="/respond.php?code=wxpay&status=1&subject='.$out_trade_no.'"}else{window.location.href="respond.php?code=wxpay&status=0&subject="}});}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();}}
</script>';
$button = '<div style="text-align:center"><button class="c-btn3" type="button" onclick="callpay()" style="background:#f16681;display:inline-block;padding:5px 10px;border-radius:3px;font-size:14px;color:#fff;border:1px solid #fff;" >微信安全支付</button></div>' . $js;
return $button;
} function trimString($value)
{
$ret = null;
if (null != $value)
{
$ret = $value;
if (strlen($ret) == 0)
{
$ret = null;
}
}
return $ret;
} /**
* 作用：产生随机字符串，不长于32位
*/
public function createNoncestr( $length = 32 )
{
$chars = "abcdefghijklmnopqrstuvwxyz0123456789";
$str ="";
for ( $i = 0; $i < $length; $i++ ) {
$str.= substr($chars, mt_rand(0, strlen($chars)-1), 1);
}
return $str;
} /**
* 作用：设置请求参数
*/
function setParameter($parameter, $parameterValue)
{
$this->parameters[$this->trimString($parameter)] = $this->trimString($parameterValue);
} /**
* 作用：生成签名
*/
public function getSign($Obj)
{
foreach ($Obj as $k => $v)
{
$Parameters[$k] = $v;
}
//签名步骤一：按字典序排序参数
ksort($Parameters); $buff = "";
foreach ($Parameters as $k => $v)
{
$buff .= $k . "=" . $v . "&";
}
$String;
if (strlen($buff) > 0)
{
$String = substr($buff, 0, strlen($buff)-1);
}
//echo '【string1】'.$String.'</br>';
//签名步骤二：在string后加入KEY
$String = $String."&key=".$this->payment['wxpay_AppSecret'];
//echo "【string2】".$String."</br>";
//签名步骤三：MD5加密
$String = md5($String);
//echo "【string3】 ".$String."</br>";
//签名步骤四：所有字符转为大写
$result_ = strtoupper($String);
//echo "【result】 ".$result_."</br>";
return $result_;
} /**
* 作用：以post方式提交xml到对应的接口url
*/
public function postXmlCurl($xml,$url,$second=30)
{
//初始化curl
$ch = curl_init();
//设置超时
curl_setopt($ch, CURLOP_TIMEOUT, $second);
//这里设置代理，如果有的话
//curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
//curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
curl_setopt($ch,CURLOPT_URL, $url);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
//设置header
curl_setopt($ch, CURLOPT_HEADER, FALSE);
//要求结果为字符串且输出到屏幕上
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
//post提交方式
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
//运行curl
$data = curl_exec($ch); curl_close($ch);
//返回结果
if($data)
{
curl_close($ch);
return $data;
}
else
{
$error = curl_errno($ch);
echo "curl出错，错误码:$error"."<br>";
echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
curl_close($ch);
return false;
}
} /**
* 获取prepay_id
*/
function getPrepayId()
{
//设置接口链接
$url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
try
{
//检测必填参数
if($this->parameters["out_trade_no"] == null){
throw new Exception("缺少统一支付接口必填参数out_trade_no！"."<br>");
}elseif($this->parameters["body"] == null){
throw new Exception("缺少统一支付接口必填参数body！"."<br>");
}elseif ($this->parameters["total_fee"] == null ) {
throw new Exception("缺少统一支付接口必填参数total_fee！"."<br>");
}elseif ($this->parameters["notify_url"] == null) {
throw new Exception("缺少统一支付接口必填参数notify_url！"."<br>");
}elseif ($this->parameters["trade_type"] == null) {
throw new Exception("缺少统一支付接口必填参数trade_type！"."<br>");
}elseif ($this->parameters["trade_type"] == "JSAPI" && $this->parameters["openid"] == NULL){
throw new Exception("统一支付接口中，缺少必填参数openid！trade_type为JSAPI时，openid为必填参数！"."<br>");
}
$this->parameters["appid"] = $this->payment['wxpay_AppID'];//公众账号ID
$this->parameters["mch_id"] = $this->payment['wxpay_shanghuID'];//商户号
$this->parameters["spbill_create_ip"] = $_SERVER['REMOTE_ADDR'];//终端ip
$this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
$this->parameters["sign"] = $this->getSign($this->parameters);//签名
$xml = "<xml>";
foreach ($this->parameters as $key=>$val)
{
if (is_numeric($val))
{
$xml.="<".$key.">".$val."</".$key.">"; }
else
{
$xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
}
}
$xml.="</xml>";
}catch (Exception $e)
{
die($e->getMessage());
}
$response = $this->postXmlCurl($xml, $url, 30);
$result = json_decode(json_encode(simplexml_load_string($response, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
$prepay_id = $result["prepay_id"];
return $prepay_id;
} /**
* 作用：设置jsapi的参数
*/
public function getParameters($prepay_id)
{
$timeStamp = time();
$jsApiObj["appId"] = $this->payment['wxpay_AppID'];
$jsApiObj["timeStamp"] = "$timeStamp";
$jsApiObj["nonceStr"] = $this->createNoncestr();
$jsApiObj["package"] = "prepay_id=$prepay_id";
$jsApiObj["signType"] = "MD5";
$jsApiObj["paySign"] = $this->getSign($jsApiObj);
$this->parameters = json_encode($jsApiObj);
return $this->parameters;
}
}

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<?php
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
if($_REQUEST['status'] == 1 && isset($_REQUEST['subject'])) {
echo '支付成功';
}else {
echo "支付失败";
}
?>
</body>
</html>