<?php
/**
 * 微信支付异步响应操作
 */
define('IN_ECTOUCH', true);

require(dirname(__FILE__) . '/mobile/include/init.php');
require(ROOT_PATH . 'include/lib_payment.php');
require(ROOT_PATH . 'include/lib_order.php');

/* 支付方式代码 */
$pay_code = 'wxpay';
/* 支付信息 */
$payment  = get_payment($pay_code);

// 获取异步数据postData
$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

if(!empty($_GET)){
	$postdata = (array)simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);

    $plugin_file = ROOT_PATH . 'include/modules/payment/' . $pay_code . '.php';
    /* 检查插件文件是否存在，如果存在则验证支付是否成功，否则则返回失败信息 */
    if (file_exists($plugin_file)) {
        /* 根据支付方式代码创建支付类的对象并调用其响应操作方法 */
        include_once($plugin_file);

        /* 检查数字签名是否正确 */
        ksort($_GET);
        reset($_GET);

        $string = '';
        foreach($_GET as $k=>$v){
            if(null != $v && 'null' != $v && 'sign' != $k){
                $string .= $k .'='. $v .'&';
            }
        }
        $string = substr($string, 0, -1);
        //默认签名
        $sign = strtoupper($_GET['sign']);
        //生成签名
        $content = strtoupper(md5($string.'&key='.$payment['wxpay_partnerkey']));
        //验证签名

        if($sign == $content){
            if($_GET['trade_state'] == 0){//交易成功
                //获取log_id
                $out_trade_no = explode('O', $_GET['out_trade_no']);
                $order_sn = $out_trade_no[1];//订单号log_id
                // 改变订单状态
                order_paid($order_sn, 2);

				//修改订单信息(openid，tranid)
				$sql = "update ".$GLOBALS['ecs']->table('pay_log')." set openid = '".$postdata['OpenId']."', transid = '".$_GET['transaction_id']."' where log_id = ".$order_sn;
				$GLOBALS['db']->query($sql);

            }
            echo 'success';
            //logResult('success');
        }else{
            echo 'fail';
            //logResult('fail');
        }
        exit;
    } 
    else {
        echo "fail";
    }
}else{
    echo "fail";
}
//打印日志
function logResult($word='') {
    $fp = fopen("log.txt","a");
    flock($fp, LOCK_EX) ;
    fwrite($fp,"执行日期：".strftime("%Y%m%d%H%M%S",time())."\n".$word."\n");
    flock($fp, LOCK_UN);
    fclose($fp);
}
?>