Yii2微信开发系列三:微信支付

微信开发的完整例子已经整理在Github,欢迎查看: yii2-wechat-demo

1.微信支付接口:打包支付数据

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public function actionPay(){
if(isset($_REQUEST["uid"])&&isset($_REQUEST["oid"])&&isset($_REQUEST["totalFee"])){
//uid、oid、totalFee
$uid = $_REQUEST["uid"];
$oid = $_REQUEST["oid"];
$totalFee = $_REQUEST["totalFee"];
$timestamp = time();

//微信支付参数
$appid = Yii::$app->params['wechat']['appid'];
$mchid = Yii::$app->params['wechat']['mchid'];
$key = Yii::$app->params['wechat']['key'];
$notifyUrl = Yii::$app->params['wechat']['notifyUrl'];

//支付打包
$wx_pay = new WechatPay($mchid, $appid, $key);
$package = $wx_pay->createJsBizPackage($uid, $totalFee, $oid, $notifyUrl, $timestamp);
$result['error'] = 0;
$result['msg'] = '支付打包成功';
$result['package'] = $package;
return $result;
}else{
$result['error'] = 1;
$result['msg'] = '请求参数错误';
}
return $result;
}

2.接收微信发送的异步支付结果通知

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public function actionNotify(){
$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
//
if ($postObj === false) {
die('parse xml error');
}
if ($postObj->return_code != 'SUCCESS') {
die($postObj->return_msg);
}
if ($postObj->result_code != 'SUCCESS') {
die($postObj->err_code);
}

//微信支付参数
$appid = Yii::$app->params['wechat']['appid'];
$mchid = Yii::$app->params['wechat']['mchid'];
$key = Yii::$app->params['wechat']['key'];
$wx_pay = new WechatPay($mchid, $appid, $key);

//验证签名
$arr = (array)$postObj;
unset($arr['sign']);
if ($wx_pay->getSign($arr, $key) != $postObj->sign) {
die("签名错误");
}

//支付处理正确-判断是否已处理过支付状态
$orders = Order::find()->where(['uid'=>$postObj->openid, 'oid'=>$postObj->out_trade_no, 'status' => 0])->all();

if(count($orders) > 0){
//更新订单状态
foreach ($orders as $order) {
//更新订单
$order['status'] = 1;
$order->update();
}
return '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';
} else {
//订单状态已更新,直接返回
return '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';
}
}

3.微信支付类 WechatPay.php

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<?php

namespace api\sdk;

use Yii;

class WechatPay
{

protected $mchid;
protected $appid;
protected $key;

public function __construct($mchid, $appid, $key){
$this->mchid = $mchid;
$this->appid = $appid;
$this->key = $key;
}

public function createJsBizPackage($openid, $totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp){
$config = array(
'mch_id' => $this->mchid,
'appid' => $this->appid,
'key' => $this->key,
);
$unified = array(
'appid' => $config['appid'],
'attach' => '支付',
'body' => $orderName,
'mch_id' => $config['mch_id'],
'nonce_str' => self::createNonceStr(),
'notify_url' => $notifyUrl,
'openid' => $openid,
'out_trade_no' => $outTradeNo,
'spbill_create_ip' => '127.0.0.1',
'total_fee' => intval($totalFee * 100),
'trade_type' => 'JSAPI',
);
$unified['sign'] = self::getSign($unified, $config['key']);
$responseXml = self::curlPost('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arrayToXml($unified));
$unifiedOrder = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);
if ($unifiedOrder === false) {
die('parse xml error');
}
if ($unifiedOrder->return_code != 'SUCCESS') {
die($unifiedOrder->return_msg);
}
if ($unifiedOrder->result_code != 'SUCCESS') {
die($unifiedOrder->err_code);
}
$arr = array(
"appId" => $config['appid'],
"timeStamp" => $timestamp,
"nonceStr" => self::createNonceStr(),
"package" => "prepay_id=" . $unifiedOrder->prepay_id,
"signType" => 'MD5',
);
$arr['paySign'] = self::getSign($arr, $config['key']);
return $arr;
}

public static function curlGet($url = '', $options = array()){
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
if (!empty($options)) {
curl_setopt_array($ch, $options);
}
//https请求 不验证证书和host
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}


public static function curlPost($url = '', $postData = '', $options = array()){
if (is_array($postData)) {
$postData = http_build_query($postData);
}
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数
if (!empty($options)) {
curl_setopt_array($ch, $options);
}
//https请求 不验证证书和host
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}

public static function createNonceStr($length = 16){
$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
$str = '';
for ($i = 0; $i<$length; $i++){
$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
return $str;
}

public static function arrayToXml($arr){
$xml = "<xml>";
foreach ($arr as $key => $val){
if (is_numeric($val)) {
$xml .= "<" . $key . ">" . $val . "</" . $key . ">";
} else {
$xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
}
}
$xml .= "</xml>";
return $xml;
}

public static function getSign($params, $key){
ksort($params, SORT_STRING);
$unSignParaString = self::formatQueryParaMap($params, false);
$signStr = strtoupper(md5($unSignParaString . "&key=" . $key));
return $signStr;
}

protected static function formatQueryParaMap($paraMap, $urlEncode = false){
$buff = "";
ksort($paraMap);
foreach ($paraMap as $k => $v){
if (null != $v && "null" != $v) {
if ($urlEncode) {
$v = urlencode($v);
}
$buff .= $k . "=" . $v . "&";
}
}
$reqPar = '';
if (strlen($buff)>0) {
$reqPar = substr($buff, 0, strlen($buff) - 1);
}
return $reqPar;
}

}

参考资料:

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