php微信jsapi支付

php:

public function wxpay ()
{
     $money = $_POST['money'];
     $pay = $this->pay($money);
     return($pay);
}

function pay($money)
    {
        $data = array(
            'appid' => 'wxxxxxxxxxxxxxxxxx',
            'body' => '支付',
            'mch_id' => 'xxxxxxxxxx', //商户号
            'nonce_str' => md5(date('YmdHis').time().rand(1000, 9999)),           //随机字符串
            'notify_url' => '',    //异步回调地址
            'openid' => $_SESSION['openid'],        //用户登录时获取的code中含有的值
            'out_trade_no' => date('YmdHis').time().rand(1000, 9999), //商家订单号
            'spbill_create_ip' => '',          //APP和网页支付提交用户端ip
            'total_fee' => $money * 100,               //订单总额
            'trade_type' => 'JSAPI'           //交易类型
        );

        function http_request_curl($url, $rawData)
        {
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_HEADER, 0);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $rawData);
            curl_setopt(
                $ch, CURLOPT_HTTPHEADER,
                array(
                    'Content-Type: text'
                )
            );
            $data = curl_exec($ch);
            curl_close($ch);
            return ($data);
        }

        $key = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';  //微信商户平台API密钥
        //制作签名
        //签名步骤一：按字典序排序参数
        ksort($data);
        $buff = "";
        foreach ($data as $k => $v) {
            if ($k != "sign" && $v != "" && !is_array($v)) {
                $buff .= $k . "=" . $v . "&";
            }
        }

        $buff = trim($buff, "&");
        //签名步骤二：在string后加入KEY
        $string = $buff . "&key=" . $key;
        //签名步骤三：MD5加密
        $string = md5($string);
        //签名步骤四：所有字符转为大写
        $sign = strtoupper($string);
        $data['sign'] = $sign;

        ksort($data);
        //进行拼接数据
        $abc_xml = "";
        foreach ($data as $key => $val) {
            if (is_numeric($val)) {
                $abc_xml .= "<" . $key . ">" . $val . "";
            } else {
                $abc_xml .= "<" . $key . ">";
            }
        }

        $abc_xml .= "";

        $url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
        $xml = http_request_curl($url, $abc_xml);     //POST方式请求http
        function xmlToArray($xml)
        {
            //禁止引用外部xml实体
            libxml_disable_entity_loader(true);
            $xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);
            $val = json_decode(json_encode($xmlstring), true);
            return $val;
        }

        $info = xmlToArray($xml);

        function MakeSign($params, $KEY)
        {
            //签名步骤一：按字典序排序数组参数
            ksort($params);
            $buff1 = '';
            foreach ($params as $k => $v) {
                if ($k != "sign" && $v != "" && !is_array($v)) {
                    $buff1 .= $k . "=" . $v . "&";
                }
            }
            $buff1 = trim($buff1, "&");
            //签名步骤二：在string后加入KEY
            $string = $buff1 . "&key=" . $KEY;
            //签名步骤三：MD5加密
            $string = md5($string);
            //签名步骤四：所有字符转为大写
            $result = strtoupper($string);

            return $result;

        }

        $params = array(
            'appId' => $data['appid'],
            'nonceStr' => $data['nonce_str'],
            'package' => 'prepay_id='.$info['prepay_id'],
            'signType' => 'MD5',
            'timeStamp' => time()
        );
        $key = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';  //微信商户平台API密钥
        $info = array_merge($info, $params);
        $info['paySign'] = MakeSign($params, $key);
        $info['timeStamp'] = "".$params['timeStamp']."";
        $info['nonceStr'] = $params['nonceStr'];
        $info['package'] = $params['package'];
        return ($info);
    }

js: