haoshengxin/common/library/Pay/WechatPay.php

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2016/1/28
 * Time: 16:16
 */
namespace common\library\Pay;
use common\library\Apireturn;
use common\library\Pay\lib\WxPayApi;
use common\library\Pay\lib\WxPayUnifiedOrder;
use yii\helpers\Url;
use Yii;
class WechatPay
{
    public function pay($orderInfo)
    {
        $input = new WxPayUnifiedOrder();
        $input->SetBody("豪省心装修网-升级会员");//商品描述 APP——需传入应用市场上的APP名字-实际商品名称，天天爱消除-游戏充值。
        //$input->SetAttach("test");//自定义参数
        $input->SetOut_trade_no($orderInfo->out_trade_no);//内容订单号,使用我们的订单号
        $input->SetAppid(Yii::$app->params['wechatapi']['appidCompany']);//公众账号ID
        $input->SetMch_id(Yii::$app->params['wechat']['mchid']);//商户号
        $input->key = Yii::$app->params['wechat']['key'];
        $input->SetTotal_fee($orderInfo->amount * 100);//付款金额,单位分
        $notify_url =\Yii::$app->request->getHostInfo().Url::toRoute(['pay/wechatnotify']);
        $input->SetNotify_url($notify_url);//回调地址
        $input->SetOpenid($orderInfo->openid);//openid
        $input->SetTrade_type("JSAPI");//支付类型
        $order = WxPayApi::unifiedOrder($input);
        if($order['return_code']!='SUCCESS')
            return Apireturn::sent(0,$order['return_msg'],200);
        return $order;
    }

    static function getSign($data)
    {
        ksort($data);
        $buff = "";
        foreach ($data as $k => $v)
        {
            if($k != "sign" && $v != "" && !is_array($v)){
                $buff .= $k . "=" . $v . "&";
            }
        }
        $buff = trim($buff, "&");

        $string = $buff . "&key=".Yii::$app->params['wechat']['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;
    }



}