wx.requestPayment 发起微信支付
timeStamp 时间戳
nonceStr 随机字符串
package 统一下单接口返回的 prepay_id 参数值
signType 签名算法
paySign 支付签名
success 接口成功回调
fail 接口失败回调
complete 接口完成回调（成功，失败都执行）
1.先调用后台接口，生产基本数据
// 获取店铺信息
Api.BalancePay({
openid: openid,
amount: amount,
bid: bid,
}).then(res => {
if (res.errno) {
wx.showToast({ title: res.errdesc });
return;
}
var data = res.data;
...
})具体的这个是做什么的呢？
判断用户是否存在。
判断充值id是否存在。
判断充值金额是否合法。
创建充值订单。
创建统一支付订单。
public function unifiedorder($openid,$order_num,$total_fee,$products_name){
$trade_no = $order_num;
$url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
$data = [
'appid' => C('APPID'),
'mch_id' => C('MCHID'),
'nonce_str' => $this->createNonceStr(),
'sign_type' => 'MD5',
'body' => $products_name, //商品名称组合
'attach' => C('PAY_ATTACH_NAME'),
'out_trade_no' => $trade_no, //订单号
'fee_type' => 'CNY',
'total_fee' => $total_fee,
'spbill_create_ip' => $_SERVER['REMOTE_ADDR'],
'goods_tag' => C('PAY_ATTACH_NAME'),
'notify_url' => 'https://a.squmo.com/'.C('PAY_URL_NAME').'/Recharge/order_notice',
'trade_type' => 'JSAPI',
'openid' => $openid
];
// 获取签名
$sign = $this->MakeSign($data);
$data['sign'] = $sign;
$xml = $this->ToXml($data);
vendor('Func.Http');
// 提交获取数据
$result = $this->FromXml(Http::postXmlCurl($url,$xml));
return $result;
}一切准备就绪之后，将一些数据返回给小程序。
$unifiedorder = $this->unifiedorder($openid,$order_num,$total_price,$products_name);
$data = [
'appId' => C('APPID'),
'timeStamp' => time(),
'nonceStr' => $this->createNonceStr(),
'package' => 'prepay_id='.$unifiedorder['prepay_id'],
'signType' => 'MD5'
];
// 获取签名
$sign = $this->MakeSign($data);
$data['sign'] = $sign;
$this->json->setAttr('data',$data);
$this->json->Send();2.再发起微信支付
wx.requestPayment({
'timeStamp': data.timeStamp.toString(),
'nonceStr': data.nonceStr,
'package': data.package,
'signType': 'MD5',
'paySign': data.sign,
'success': function (res) {
console.log('支付成功');
},
'fail': function (res) {
console.log('支付失败');
return;
},
'complete': function (res) {
console.log('支付完成');
var url = that.data.url;
console.log('get url', url)
if (res.errMsg == 'requestPayment:ok') {
wx.showModal({
title: '提示',
content: '充值成功'
});
if (url) {
setTimeout(function () {
wx.redirectTo({
url: '/pages' + url
});
}, 2000)
} else {
setTimeout(() => {
wx.navigateBack()
}, 2000)
}
}
return;
}
});3.支付成功的回调（异步操作）
//微信支付回调
public function order_notice(){
// 微信公众平台推送过来的post数据
$xml = $GLOBALS['HTTP_RAW_POST_DATA'];
// 获取数据
$data = $this->FromXml($xml);
// 保存微信服务器返回的签名sign
$data_sign = $data['sign'];
// sign不参与签名算法
unset($data['sign']);
$sign = $this->makeSign($data);
// 判断签名是否正确 判断支付状态
if ( ($sign===$data_sign) && ($data['return_code']=='SUCCESS') && ($data['result_code']=='SUCCESS') ) {
$result = $data;
//获取服务器返回的数据
$order_num = $data['out_trade_no']; //订单单号
$openid = $data['openid']; //付款人openID
$total_fee = $data['total_fee']; //付款金额
$transaction_id = $data['transaction_id']; //微信支付流水号
$user = M('user');
$user_flag = $user->where(array('openid'=>$openid))->find();
$save_data = array(
'total_payed_price' => $total_fee, //实际到帐金额
'transaction_id' => $transaction_id,
'paytime' => time(),
'status' => 2 //1未支付;2已支付;3已申请退款;4已退款；5已完成
);
$recharge = M('recharge');
$recharge_flag=$recharge->where(array('recoder'=>$order_num,'uid'=>$user_flag['id']))->find();
$recharge_amount=$recharge_flag['amount'];
$recharge_save_flag =$recharge->where(array('recoder'=>$order_num,'uid'=>$user_flag['id']))->save($save_data);
if($recharge_save_flag){
$save_balance['balance']= $user_flag['balance']+$recharge_amount;
$result_balance =$user->where(array('openid'=>$openid))->save($save_balance);
}
}else{
$result = false;
}
// 返回状态给微信服务器
if ($result) {
$str='<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';
}else{
$str='<xml><return_code><![CDATA[FAIL]]></return_code><return_msg><![CDATA[签名失败]]></return_msg></xml>';
}
echo $str;
return $result;
}其他常用函数
public function FromXml($xml)
{
if(!$xml){
throw new WxPayException("xml数据异常！");
}
//将XML转为array
//禁止引用外部xml实体
libxml_disable_entity_loader(true);
$this->values = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
return $this->values;
}
public function ToXml($array){
if(!is_array($array)|| count($array) <= 0){
return ;
}
$xml = '<xml version="1.0">';
foreach ($array as $key=>$val){
if (is_numeric($val)){
$xml.="<".$key.">".$val."</".$key.">";
}else{
$xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
}
}
$xml.="</xml>";
return $xml;
}
private function MakeSign($data)
{
//签名步骤一：按字典序排序参数
ksort($data);
$string = $this->ToUrlParams($data);
//签名步骤二：在string后加入KEY
$string = $string . "&key=".C('WEIXIN_PAY_KEY');
//签名步骤三：MD5加密
$string = md5($string);
//签名步骤四：所有字符转为大写
$result = strtoupper($string);
return $result;
}
private function ToUrlParams($array)
{
$buff = "";
foreach ($array as $k => $v)
{
if($k != "sign" && $v != "" && !is_array($v)){
$buff .= $k . "=" . $v . "&";
}
}
$buff = trim($buff, "&");
return $buff;
}