ThinkPHP V5.0 接入微信支付

微信支付接口

• 组装访问数组

1$data['body'] = '商城购买商品';//订单标题
2$data['out_trade_no'] = generate_rand_str(8, 0);//平台订单号(非小程序订单,自己平台生成的)
3$data['notify_url'] = $this->request->domain().'';//微信支付回调地址,不带参数
4$data['total_fee'] = $price;//价格,单位(元)
5$data['openid'] = $this->user['openid'];//用户openid
6$res = $this->unifiedorder($config['wechat_appid'],$config['wechat_mch_id'],$config['wechat_key'],$data);//访问统一下单

• 统一下单

1/**
2 * 统一下单方法
3 * $appid 小程序id
4 * $mchid 商户号
5 * $key 微信支付key
6 * $data 信息数组
7 * */
8public function unifiedorder($appid,$mch_id,$key,$data)
9{
10    $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';//微信统一下单访问url
11    $parameters = array(
12        'appid' => $appid, //小程序ID
13        'mch_id' => $mch_id, //商户号
14        'nonce_str' => generate_rand_str(8, 0), //随机字符串
15        'body' => $data['body'], //商品描述
16        'out_trade_no' => $data['out_trade_no'], //商户订单号
17        'total_fee' => floatval($data['total_fee'] * 100), //总金额 单位 分
18        'spbill_create_ip' => $_SERVER['REMOTE_ADDR'], //终端IP
19        'notify_url' => $data['notify_url'].'index.php/callback', //通知地址 确保外网能正常访问
20        'openid' => $data['openid'], //用户id
21        'trade_type' => 'JSAPI'//交易类型//要是返回该产品权限未开通请在产品中心开通jsAPi他包含的小程序支付
22    );
23    //统一下单签名
24    $parameters['sign'] = $this->getSign($parameters,$key);
25    $xmlData = $this->arrayToXml($parameters);
26    $return = $this->xmlToArray($this->postXmlCurl($xmlData, $url, 60));
27    return $return;
28}

生成随机数

1/**
2 * 生成随机字符串
3 * @param int $length 生成长度
4 * @param int $type 生成类型：0-小写字母+数字，1-小写字母，2-大写字母，3-数字，4-小写+大写字母，5-小写+大写+数字
5 * @return string
6 */
7function generate_rand_str($length = 8, $type = 0) {
8    $a = 'abcdefghijklmnopqrstuvwxyz';
9    $A = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
10    $n = '0123456789';
11
12    switch ($type) {
13        case 1: $chars = $a; break;
14        case 2: $chars = $A; break;
15        case 3: $chars = $n; break;
16        case 4: $chars = $a.$A; break;
17        case 5: $chars = $a.$A.$n; break;
18        default: $chars = $a.$n;
19    }
20
21    $str = '';
22    for ($i = 0; $i < $length; $i++) {
23        $str .= $chars[ mt_rand(0, strlen($chars) - 1) ];
24    }
25    return $str;
26}

生成签名

1/**
2 * 生成签名
3 * @param array $Obj 访问数组
4 * @param string $key 商户key
5 * @return string
6 */
7public function getSign($Obj,$key) {
8    foreach ($Obj as $k => $v) {
9        $Parameters[$k] = $v;
10    }
11    //签名步骤一：按字典序排序参数
12    ksort($Parameters);
13    $String = $this->formatBizQueryParaMap($Parameters, false);
14    //签名步骤二：在string后加入KEY
15    $String = $String . "&key=" . $key;
16    //签名步骤三：MD5加密
17    $String = md5($String);
18    //签名步骤四：所有字符转为大写
19    $result_ = strtoupper($String);
20    return $result_;
21}

格式化参数，签名过程需要使用

1//作用：格式化参数，签名过程需要使用
2public function formatBizQueryParaMap($paraMap, $urlencode) {
3    $buff = "";
4    ksort($paraMap);
5    foreach ($paraMap as $k => $v) {
6        if ($urlencode) {
7            $v = urlencode($v);
8        }
9        $buff .= $k . "=" . $v . "&";
10    }
11    $reqPar = array();
12    if (strlen($buff) > 0) {
13        $reqPar = substr($buff, 0, strlen($buff) - 1);
14    }
15    return $reqPar;
16}

数组转换成xml

1//数组转换成xml
2public function arrayToXml($arr) {
3    $xml = "<root>";
4    foreach ($arr as $key => $val) {
5        if (is_array($val)) {
6            $xml .= "<" . $key . ">" . $this->arrayToXml($val) . "</" . $key . ">";
7        } else {
8            $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
9        }
10    }
11    $xml .= "</root>";
12    return $xml;
13}

xml格式访问

1public function postXmlCurl($xml, $url, $second = 30)
2{
3    $ch = curl_init();
4    //设置超时
5    curl_setopt($ch, CURLOPT_TIMEOUT, $second);
6    curl_setopt($ch, CURLOPT_URL, $url);
7    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
8    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //严格校验
9    //设置header
10    curl_setopt($ch, CURLOPT_HEADER, FALSE);
11    //要求结果为字符串且输出到屏幕上
12    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
13    //post提交方式
14    curl_setopt($ch, CURLOPT_POST, TRUE);
15    curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
16    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
17    curl_setopt($ch, CURLOPT_TIMEOUT, 40);
18    set_time_limit(0);
19    //运行curl
20    $data = curl_exec($ch);
21    //返回结果
22    curl_close($ch);
23    return $data;
24}

将xml转换成数组

1 public function xmlToArray($xml) {
2    //禁止引用外部xml实体
3    libxml_disable_entity_loader(true);
4    $xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);
5    $val = json_decode(json_encode($xmlstring), true);
6    return $val;
7}

微信支付成功回调接口

1//微信支付回调
2public function callback()
3{
4    $postXml = file_get_contents("php://input");//获取回调的xml格式
5    $attr = $this->xmlToArray($postXml);//将获取的xml转为数组
6    if($attr['result_code'] == 'SUCCESS'){
7        //在此书写支付成功后的逻辑
8        return true;
9    }else{
10        //在此书写支付失败后的逻辑
11        return false;
12    }
13}