微信小程序支付(服务端) - php

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微信小程序支付(服务端)

南鸢离梦的博客

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下单示例
<?php
namespace app\miniapp\controller;

class Api extends Controller {
public function pay()
{

        // 直接下单
        $g[0]['id'] = $gid;
        $g[0]['num'] = $num;
        $data['qid'] = $qid;
        $data['goods'] = json_encode($g);
        $data['money'] = $money;
        $address = MarketAddress::where('openid',$this->userinfo['openid'])->find();
        unset($address['id']); unset($address['qid']); unset($address['uid']);
        unset($address['openid']); unset($address['lat']); unset($address['lng']);
        $data['ag'] = $address['ag'];
        $data['address'] = json_encode($address);
        $data['order_number'] = date('YmdHis',time());
        $data['openid'] = $this->userinfo['openid'];
        $data['uid'] = $this->userId;
        $data['time'] = date('Y-m-d H:i:s',time());
        $res = Db::name('miniapp_order')->insert($data);
        if (!$res){
            return json(['code'=>0,'网络不佳,下单失败']);
        }
        $pay = new WxPay(); // 实例化并调用
        $result = $pay->wechatPay($this->userinfo['openid'],$data['money'],'乐尚客生活',$data['order_number']);
        return $result;
}

}

封装好的微信支付类
<?php
namespace app\miniapp\controller;

class wxPay
{
//微信支付微信用户的openid 要***的金额支付的类型名称商品名下单订单号
public function wechatPay($user_openid = ‘’, $ro_pay_price = ‘’, $body_name = ‘’, $order_number = ‘’){

    $fee = $ro_pay_price; //举例充值0.01
    $appid = 'wxec5fff46b3259747';//如果是公众号 就是公众号的appid
    $body = $body_name;  // 举例: 服务预约
    $mch_id = '123456789';   // 您的商户账号
    $nonce_str = $this->nonce_str(); //随机字符串
    $notify_url = 'http://xxx.com';  // 回调的url【自己填写,如若回调不成功请注意查看服务器是否开启防盗链,回调地址用http】
    $openid = $user_openid;  // 用户openid  传参
    $out_trade_no = $order_number;//商户订单号
    $spbill_create_ip = '122.114.99.99';   // IP白名单
    $total_fee = $fee * 100; //因为充值金额最小是1 而且单位为分 如果是充值1元所以这里需要*100
    $trade_type = 'JSAPI'; //交易类型 默认
    //这里是按照顺序的 因为下面的签名是按照顺序 排序错误 肯定出错
    $post['appid'] = $appid;
    $post['body'] = $body;
    $post['mch_id'] = $mch_id;
    $post['nonce_str'] = $nonce_str;//随机字符串
    $post['notify_url'] = $notify_url;
    $post['openid'] = $openid;
    $post['out_trade_no'] = $out_trade_no;
    $post['spbill_create_ip'] = $spbill_create_ip;//终端的ip
    $post['total_fee'] = $total_fee;//总金额 最低为一块钱 必须是整数
    $post['trade_type'] = $trade_type;
    $sign = $this->sign($post);//签名
    $post_xml = '<xml>
       <appid>'.$appid.'</appid>
       <body>'.$body.'</body>
       <mch_id>'.$mch_id.'</mch_id>
       <nonce_str>'.$nonce_str.'</nonce_str>
       <notify_url>'.$notify_url.'</notify_url>
       <openid>'.$openid.'</openid>
       <out_trade_no>'.$out_trade_no.'</out_trade_no>
       <spbill_create_ip>'.$spbill_create_ip.'</spbill_create_ip>
       <total_fee>'.$total_fee.'</total_fee>
       <trade_type>'.$trade_type.'</trade_type>
       <sign>'.$sign.'</sign>
    </xml> ';
    //统一接口prepay_id
    $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
    $xml = $this->http_request($url, $post_xml);
    $array = $this->xml($xml); //全要大写
    if($array['RETURN_CODE'] == 'SUCCESS' && $array['RESULT_CODE'] == 'SUCCESS'){
        $time = time();
        $tmp='';//临时数组用于签名
        $tmp['appId'] = $appid;
        $tmp['nonceStr'] = $nonce_str;
        $tmp['package'] = 'prepay_id='.$array['PREPAY_ID'];
        $tmp['signType'] = 'MD5';
        $tmp['timeStamp'] = "$time";
        $data['statu'] = 1;
        $data['timeStamp'] = "$time";//时间戳
        $data['nonceStr'] = $nonce_str;//随机字符串
        $data['signType'] = 'MD5';//签名算法，暂支持 MD5
        $data['package'] = 'prepay_id='.$array['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'] = $this->sign($tmp);//签名,具体签名方案参见微信公众号支付帮助文档;
        $data['out_trade_no'] = $out_trade_no;
    }else{
        $data['statu'] = 0;
        $data['text'] = "错误";
        $data['RETURN_CODE'] = $array['RETURN_CODE'];
        $data['RETURN_MSG'] = $array['RETURN_MSG'];
    }
    return json_encode($data);
}
//签名 $data要先排好顺序
private function sign($data)
{
    $stringA = '';
    foreach ($data as $key => $value) {
        if (!$value) continue;
        if ($stringA) $stringA .= '&' . $key . "=" . $value;
        else $stringA = $key . "=" . $value;
    }
    $wx_key = 'abcdefghijklmnopqrstuvwxyz123456789';//申请支付后有给予一个商户账号和密码，登陆后自己设置key
    $stringSignTemp = $stringA . '&key=' . $wx_key;//申请支付后有给予一个商户账号和密码，登陆后自己设置key
    return strtoupper(md5($stringSignTemp));
}
//随机32位字符串
private function nonce_str(){
    $result = '';
    $str = 'QWERTYUIOPASDFGHJKLZXVBNMqwertyuioplkjhgfdsamnbvcxz';
    for ($i=0;$i<32;$i++){
        $result .= $str[rand(0,48)];
    }
    return $result;
}
//curl请求啊
function http_request($url,$data = null,$headers=array())
{
    $curl = curl_init();
    if( count($headers) >= 1 ){
        curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
    }
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
    if (!empty($data)){
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
    }
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    $output = curl_exec($curl);
    curl_close($curl);
    return $output;
}
//获取xml
private function xml($xml){
    $p = xml_parser_create();
    xml_parse_into_struct($p, $xml, $vals, $index);
    xml_parser_free($p);
    $data = "";
    foreach ($index as $key=>$value) {
        if($key == 'xml' || $key == 'XML') continue;
        $tag = $vals[$value[0]]['tag'];
        $value = $vals[$value[0]]['value'];
        $data[$tag] = $value;
    }
    return $data;
}

}

支付完回调

<?php

namespace app\miniapp\controller;

class Notify extends Controller {
// 支付回调
public function notify(){
$testxml = file_get_contents(“php://input”);
$jsonxml = json_encode(simplexml_load_string($testxml, ‘SimpleXMLElement’, LIBXML_NOCDATA));

    $result = json_decode($jsonxml, true);//转成数组，
    if($result){
        //如果成功返回了
        if($result['return_code'] == 'SUCCESS' && $result['result_code'] == 'SUCCESS'){
            // 这里写回调更新支付状态以及你的业务逻辑
            // 告知微信回调成功
            echo 'SUCCESS';
        }
    }
}

}

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2019-08-06 14:10:48