Recently, due to business needs, I have connected WeChat H5 payment. However, WeChat payment does not have a ready-made demo available for this piece, so I must honestly compare the development documents to write it! But for the new children's shoes, there are still more or less pits, so I thought about sharing my experience. After all, the ready-made ones are still Dopa Shi!
Well, I won't say much about the set of official documents. For details, see the official documents .
Here, I mainly divided into three files: WxPay.Config.php (payment configuration file), Weixin.class.php (payment class) and PayMentController.class.php (payment file).
First, the WxPay.Config.php configuration file mainly contains the merchant appId, merchant number, merchant key, asynchronous callback URL, and payment scene information, as follows:
class WxPayConfig
{
public static $appid = '微信支付的公众号appid';
public static $mchid = '微信支付分配的商户号';
public static $key = '微信商户自己设置的安全key';
public static $notify_url = '商户侧接收微信支付异步通知的URL';
public static $scene_info = '{"h5_info":{"type":"Wap","wap_url":" 发起微信H5支付H5的URL","wap_name":"支付"}}';
}Then, encapsulate the Weixin.class.php payment class, and mainly call the unified order Api . I wo n't say much here, just go to the code:
<?php
require_once "lib/WxPay.Config.php";
class Weixin
{
/**
* 微信H5下单付款
* @order 付款信息
* @bodys 付款内容
* */
function getCode($order,$bodys){
$url = "https://api.mch.weixin.qq.com/pay/unifiedorder";//微信传参地址
//1.获取调用统一下单接口所需必备参数
$appid =WxPayConfig::$appid;//微信公众号appid
$mch_id = WxPayConfig::$mchid;//微信支付商户号
$key = WxPayConfig::$key;//自己设置的微信商家key
$out_trade_no = $order['order_sn'];//平台内部订单号
$nonce_str=MD5($out_trade_no);//随机字符串
$body = $bodys;//付款内容
$total_fee = $order['order_amount']*100;//付款金额，单位为分
$spbill_create_ip = getIP(); //获得用户设备IP
$attach = 'weixinh5';//附加数据（自定义，在支付通知中原样返回）
$notify_url = WxPayConfig::$notify_url; //异步回调地址，需外网可以直接访问
$trade_type = 'MWEB';//交易类型，微信H5支付时固定为MWEB
$scene_info =WxPayConfig::$scene_info;//场景信息
//2.将参数按照key=value的格式，并按照参数名ASCII字典序排序生成字符串
$signA ="appid=$appid&attach=$attach&body=$body&mch_id=$mch_id&nonce_str=$nonce_str¬ify_url=$notify_url&out_trade_no=$out_trade_no&scene_info=$scene_info&spbill_create_ip=$spbill_create_ip&total_fee=$total_fee&trade_type=$trade_type";
//3.拼接字符串
$strSignTmp = $signA."&key=$key";
//4.MD5加密后转换成大写
$sign = strtoupper(MD5($strSignTmp));
//5.拼接成所需XML格式
$post_data = "<xml>
<appid>$appid</appid>
<attach>$attach</attach>
<body>$body</body>
<mch_id>$mch_id</mch_id>
<nonce_str>$nonce_str</nonce_str>
<notify_url>$notify_url</notify_url>
<out_trade_no>$out_trade_no</out_trade_no>
<spbill_create_ip>$spbill_create_ip</spbill_create_ip>
<total_fee>$total_fee</total_fee>
<trade_type>$trade_type</trade_type>
<scene_info>$scene_info</scene_info>
<sign>$sign</sign>
</xml>";
//6.以POST方式向微信传参，并取得微信返回的支付参数
$dataxml = httpRequest($url,'POST',$post_data);
$objectxml = (array)simplexml_load_string($dataxml, 'SimpleXMLElement', LIBXML_NOCDATA); //将微信返回的XML转换成数组
return $objectxml;
}
}Finally, the PayMentController.class.php payment file, after the payment file receives the payment request initiated by the front-end and processes it, calls the Weixin.class.php payment class and accepts the result and returns it to the front-end (the code logic such as interface verification has been removed from the sharing here) :
public function getPay(){
//1.引入支付类文件
include_once "plugins/Payment/weixin/Weixin.class.php";
$payment = new \Weixin();
$order_id = I('order_id');
//2.判断参数是否为空
if (!empty($order_id)){
//3.根据订单id查询订单是否存在
$order = M('Order')->where(array('id'=>$order_id))->find();
if ($order){//订单存在
//4.判断该笔订单是否已经支付，如已支付则返回支付失败并给出相应提示
if ($order['pay_status'] == '1'){
exit(json_encode(array('status'=>'205','msg'=>'该订单已支付，请勿重复提交！')));
}
$bodys = '订单：'.$order['order_sn'] . '支付';
//5.调用支付类中封装的支付方法并对应传参
$result = $payment->getCode($order,$bodys);
//6.当return_code和result_code均为SUCCESS，代表下单成功，将支付参数返回
if($result['return_code'] == 'SUCCESS'){
if($result['result_code'] == 'SUCCESS'){
exit(json_encode(array('status'=>'0','msg'=>'下单成功，请支付！','result'=>$result['mweb_url'])));
}elseif($result['result_code'] == 'FAIL'){
exit(json_encode(array('status'=>'-201','msg'=>$result['err_code_des'])));
}
}else{
exit(json_encode(array('status'=>'-1','msg'=>'未知错误，请稍后重试！')));
}
}else{
//报错:数据不存在
exit(json_encode(array('status'=>'-200','msg'=>'订单不存在，请核实后再提交！')));
}
}else{
//报错:缺少参数
exit(json_encode(array('status'=>'-204','msg'=>'参数缺失，请核实！')));
}
}The front-end can wake up WeChat payment after receiving the payment URL.
Attachment 1: The method of obtaining the IP of the user terminal device
function getIP(){
if (getenv("HTTP_CLIENT_IP"))
$ip = getenv("HTTP_CLIENT_IP");
else if(getenv("HTTP_X_FORWARDED_FOR"))
$ip = getenv("HTTP_X_FORWARDED_FOR");
else if(getenv("REMOTE_ADDR"))
$ip = getenv("REMOTE_ADDR");
else $ip = "Unknow";
return $ip;
}######Appendix 2: CURL request method
/** * CURL请求 * @param $url 请求url地址 * @param $method 请求方法 get post * @param null $postfields post数据数组 * @param array $headers 请求header信息 * @param bool|false $debug 调试开启 默认false * @return mixed */
function httpRequest($url, $method, $postfields = null, $headers = array(), $debug = false) {
$method = strtoupper($method);
$ci = curl_init();
/* Curl settings */
curl_setopt($ci, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
curl_setopt($ci, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0");
curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 60); /* 在发起连接前等待的时间，如果设置为0，则无限等待 */
curl_setopt($ci, CURLOPT_TIMEOUT, 7); /* 设置cURL允许执行的最长秒数 */
curl_setopt($ci, CURLOPT_RETURNTRANSFER, true);
switch ($method) {
case "POST":
curl_setopt($ci, CURLOPT_POST, true);
if (!empty($postfields)) {
$tmpdatastr = is_array($postfields) ? http_build_query($postfields) : $postfields;
curl_setopt($ci, CURLOPT_POSTFIELDS, $tmpdatastr);
}
break;
default:
curl_setopt($ci, CURLOPT_CUSTOMREQUEST, $method); /* //设置请求方式 */
break;
}
$ssl = preg_match('/^https:\/\//i',$url) ? TRUE : FALSE;
curl_setopt($ci, CURLOPT_URL, $url);
if($ssl){
curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, FALSE); // https请求 不验证证书和hosts
curl_setopt($ci, CURLOPT_SSL_VERIFYHOST, FALSE); // 不从证书中检查SSL加密算法是否存在
}
curl_setopt($ci, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ci, CURLOPT_MAXREDIRS, 2);/*指定最多的HTTP重定向的数量，这个选项是和CURLOPT_FOLLOWLOCATION一起使用的*/
curl_setopt($ci, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ci, CURLINFO_HEADER_OUT, true);
$response = curl_exec($ci);
$requestinfo = curl_getinfo($ci);
if ($debug) {
echo "=====post data======\r\n";
var_dump($postfields);
echo "=====info===== \r\n";
print_r($requestinfo);
echo "=====response=====\r\n";
print_r($response);
}
curl_close($ci);
return $response;
}Well, a little bit of rookie experience, if there is anything inappropriate, please leave a message to testify and exchange, grow together, meow, that's it!