微信支付封装示例与API调用

<?php
namespace MyClass;

class WechatPay
{
    public function createJsBizPackage($totalFee, $outTradeNo, $orderName, $timestamp){
        $unified = array(
            'appid' => WX_APPID,
            'attach' => '支付',
            'body' => $orderName,
            'mch_id' => WX_MACID,
            'nonce_str' => self::createNonceStr(),
            'notify_url' => WX_URL,
            'out_trade_no' => $outTradeNo,
            'spbill_create_ip' => '127.0.0.1',
            'total_fee' => intval($totalFee * 100),
            'trade_type' => 'APP',
        );
        $unified['sign'] = self::getSign($unified);
        $responseXml = self::curlPost('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arrayToXml($unified));
        $unifiedOrder = (array)simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);
        if ($unifiedOrder === false) {
            die('parse xml error');
        }
        if ($unifiedOrder['return_code'] != 'SUCCESS') {
            die($unifiedOrder['return_msg']);
        }
        if ($unifiedOrder['result_code'] != 'SUCCESS') {
            die($unifiedOrder['err_code']);
        }