本文实例讲述了php小程序支付功能。分享给大家供大家参考，具体如下：
环境： tp3.2 + 小程序 微信支付功能开通
step1: 下载php 支付sdk() 放到library\vendor下，取名wxpay
修改wxpay.config.php 里的appid appsecret key mchid
step2: 小程序 js 代码：
var url = getapp().globaldata.httpserver + 'api/buy/pay';
var userid = getapp().globaldata.userid;
var totalmoney = this.data.totalmoney;
var cart = this.data.goods;
var param = {
cart: json.stringify(cart),
cartamount: totalmoney,
userid: userid,
payment: this.data.payment,
addressid: defaultaddress.id
};
var that = this;
util.http(url, param, function (ret) {
if (ret.data.code == 1) {
if (that.data.payment == 'balance') { // 余额支付
that.afterpaysuccess(ret.data.data);
} else { // 微信支付
wx.requestpayment({
timestamp: ret.data.data.timestamp,
noncestr: ret.data.data.noncestr,
package: ret.data.data.package,
signtype: ret.data.data.signtype,
paysign: ret.data.data.paysign,
'success': function (res) {
that.afterpaysuccess(ret.data.data.orderid);
},
'fail': function (res) {
console.log(res);
}
})
}
} else {
util.showtip(ret.data.msg, '提交订单失败');
}
});
/**
* 网络请求
*/
function http(url, params, callback) {
wx.request({
url: url,
data: params,
success: function (res) {
callback(res);
},
fail: function (err) {
console.log(err);
}
});
}
step3: 接口代码：
public function pay()
{
$cart = i('cart', '', 'trim');
$cartamount = i('cartamount');
$addressid = i('addressid', 0, 'intval');
$payment = i('payment', '', 'trim');
$userid = $this->userid;
$cart = json_decode($cart, true);
if (empty($cart)) {
$result['msg'] = '购物车获取失败';
$result['code'] = 0;
$this->ajaxreturn($result);
}
$totalmoney = 0;
foreach ($cart as $goods) {
$money = $goods['price']; // price
$selectcount = $goods['selectcount']; // price
$itemamount = number_format($money * $selectcount, 2, '.', '');
$totalmoney += $itemamount;
}
// 检查总金额是否一致
if ($totalmoney != $cartamount) {
$result['msg'] = '总金额不匹配:' . $totalmoney;
$result['code'] = 0;
$this->ajaxreturn($result);
}
// 获取用户地址
$address = m('memberaddress')->where('userid=' . $userid . " and id=" . $addressid)->find();
if (empty($address)) {
$result['msg'] = '用户地址不存在';
$result['code'] = 0;
$this->ajaxreturn($result);
}
// 用户信息
$user = m('member')->where("id=" . $userid)->find();
if ($payment == 'balance') {
if ($user['amount'] < $cartamount) {
$result['msg'] = '余额不足';
$result['code'] = 0;
$this->ajaxreturn($result);
}
}
// 生成订单
$order['ordersn'] = $this->genordersn($user['id']);
$order['price'] = $cartamount;
$order['addressid'] = $address['id'];
$order['addressinfo'] = serialize($address); //json_encode($address);
$order['longitude'] = $address['longitude'];
$order['latitude'] = $address['latitude'];
$order['addtime'] = time();
$order['status'] = 0;
$order['userid'] = $user['id'];
$order['paytype'] = $payment;
$order['paysn'] = '';
$order['paytime'] = time();
$orderid = m("order")->add($order);
if ($orderid == 0) {
$result['msg'] = '创建订单失败';
$result['code'] = 0;
$this->ajaxreturn($result);
}
foreach ($cart as $goods) {
$ordergoods['orderid'] = $orderid;
$ordergoods['goodsid'] = $goods['id'];
$ordergoods['title'] = $goods['title'];
$ordergoods['price'] = $goods['price'];
$ordergoods['attr'] = $goods['attr'];
$ordergoods['pic'] = $goods['pic'];
$ordergoods['num'] = $goods['selectcount'];
m("ordergoods")->add($ordergoods);
}
if ($payment == 'balance') {
// 余额支付
$this->balancepay($cartamount, $user['wxopenid'], $orderid);
} else if ($payment == 'weixin') {
// 微信支付
$this->weixinpay($cartamount, $user['wxopenid'], $orderid, $order['ordersn']);
}
}
/**
* 微信支付
* @author 大脸猫脸大
* @param $cart
* @param $cartamount
* @param $address
* @param $user
*/
private function weixinpay($cartamount, $openid, $orderid, $ordersn)
{
import("vendor.wxpay.lib.wxpay#api", "", ".php");
//订单号
$money = $cartamount * 100;
$openid = $openid;
$input = new \wxpayunifiedorder();
$input->setbody("迪克-商品");
$input->setout_trade_no("$ordersn");
$input->settotal_fee("$money");
$input->setnotify_url("https://" . $_server['http_host'] . "/api/buy/paynotify");
$input->settrade_type("jsapi");
$input->setopenid($openid);
$unifiedorder = \wxpayapi::unifiedorder($input);
if ($unifiedorder['result_code'] == 'success' && $unifiedorder['return_code'] == 'success') {
$time = time();
$data['timestamp'] = "$time"; //时间戳
$data['noncestr'] = $unifiedorder['nonce_str']; //随机字符串
$data['signtype'] = 'md5'; //签名算法，暂支持 md5
$data['package'] = 'prepay_id=' . $unifiedorder['prepay_id']; //统一下单接口返回的 prepay_id 参数值，提交格式如：prepay_id=*
$data['paysign'] = $this->genpaysign($unifiedorder, $time);// 之前以为是$unifiedorder['sign']; 后来发现是调用的这种方法. 签名方案参见微信公众号支付帮助文档;
$data['out_trade_no'] = $ordersn;
$data['orderid'] = $orderid;
$return['code'] = 1;
$return['data'] = $data;
} else {
log::write(var_export($unifiedorder, true), log::err, '', c('log_path')."wx_pay_".date('y_m_d').'.log');
$return['code'] = 0;
$return['msg'] = '微信支付失败';// $unifiedorder['return_msg'];
}
$this->ajaxreturn($return);
}
/* 生成支付签名*/
private function genpaysign($unifiedorder, $time)
{
$appid = \wxpayconfig::appid;
$noncestr = $unifiedorder['nonce_str'];
$package = 'prepay_id=' . $unifiedorder['prepay_id'];
$signtype = "md5";
$timestamp = $time;
$key = \wxpayconfig::key;
$sign = md5(sprintf("appid=%s&noncestr=%s&package=%s&signtype=%s×tamp=%s&key=%s", $appid, $noncestr, $package, $signtype, $timestamp, $key));
return $sign;
}
/**
* 支付回调
* @author:大脸猫脸大
*/
public function paynotify()
{
import("vendor.wxpay.lib.wxpay#data", "", ".php");
$xml = $globals['http_raw_post_data'];
$val = \wxpayresults::init($xml);
if ($val['result_code'] == 'success' && $val['return_code'] == 'success') {
$ordersn = $val['out_trade_no'];
$transactionid = $val['transaction_id'];
$data = array('paytype' => 'weixin', 'status' => '1', 'paytime' => time(), 'paysn' => $transactionid);
m("order")->where("ordersn='$ordersn'")->setfield($data);
exit('<xml><return_code><![cdata[success]]></return_code><return_msg><![cdata[ok]]></return_msg></xml>');
}else {
log::write(var_export($val, true), log::err, '', c('log_path')."wx_pay_notify_".date('y_m_d').'.log');
exit('<xml><return_code><![cdata[fail]]></return_code><return_msg><![cdata[ok]]></return_msg></xml>');
}
}
paynotify 回调方法里一定要注意返回
<xml><return_code><![cdata[success]]></return_code><return_msg><![cdata[ok]]></return_msg></xml>
如果不处理，你会发现paynotify 会被执行很多次参见：官方文档
总结一下： 注意二点， 1.签名的问题 2. 回调方法的返回处理。
欢迎大家指正。
更多关于php相关内容感兴趣的读者可查看本站专题：《php微信开发技巧汇总》、《php curl用法总结》、《php网络编程技巧总结》、《php字符串(string)用法总结》、《php中json格式数据操作技巧汇总》及《php针对xml文件操作技巧总结》
希望本文所述对大家php程序设计有所帮助。
黄山市民网：https://www.huangshanshimin.com/
