因为某一方技术的原因，可能导致商户在预期时间内都收不到最终支付通知，此时商户可以通过该API来查询订单的详细支付状态。

订单查询API的URL为：

https://api.weixin.qq.com/pay/orderquery?access_token=xxxxxx

URL中的参数只包含目前微信公众平台凭证access_token，而订单查询的真正数据是放在PostData中的，格式如下：

{    "appid" : "wwwwb4f85f3a797777",    "package" : "out_trade_no=11122&partner=1900090055&sign=4e8d0df3da0c3d0df38f",    "timestamp" : "1369745073",    "app_signature" : "53cca9d47b883bd4a5c85a9300df3da0cb48565c",    "sign_method" : "sha1"}

上述内容参数说明如表所示。

二、实现细节

1. 获得access token

这个很容易，参考微信公众平台开发(26) ACCESS TOKEN

代码如下：

$appid = "wx0000000000000000";$appsecret = "e76050733c695748537fc4d4c21d0e2c";$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appid&secret=$appsecret";$result = https_request($url);$jsoninfo = json_decode($result, true);$access_token = $jsoninfo["access_token"];

2. 参数生成

appid: 直接赋值

timestamp：程序直接获取

$timestamp = time();

sign_method：这里为sha1

难点1：package 值的获得

先要获得sign

sign是out_trade_no，partner，key(partnerkey)三项信息的字典序排序，再MD5运算，再转为大写

$sign= strtoupper(md5("out_trade_no=JfuKdiBig4zZnE4n&partner=1234567890&key=ebf5cf381de2d716d432bfda34fa9e57"));

package 是查询订单的关键信息数据，包含第三方唯一订单号 out_trade_no、财付通商户身仹标识 partner（即前文所述的 partnerid） 、签名 sign

$package = "out_trade_no=JfuKdiBig4zZnE4n&partner=1234567890&sign=".$sign;

难点2：获得app_signature

app_signature 依然是根据支付签名（paySign）生成方法中所讲的签名方式生成的，参加签名字段为：appid、appkey、package、timestamp；

$obj['appid']          = "wx0000000000000000";$obj['appkey']         = "8mruTNOGeX8OVUlIYxIyw6kxCRvdJENpWpw8mruTNOGeX8OVUlIYxIyw6kxCRvdJENpWpw8mruTNOGeX8OVUlIYxIyw6kxCRvdJENpWpw8mruTNOGeX8OVUlIYxIyw6k";$obj['package']        = $package;$obj['timestamp']      = $timestamp;$WxPayHelper->get_biz_sign($obj);

这样各项参数都获得了

3.提交查询

$jsonmenu = '{    "appid" : "wx0000000000000000",    "package" : "'.$package.'",    "timestamp" : "'.$timestamp.'",    "app_signature" : "'.$app_signature.'",    "sign_method" : "sha1"}';$url = "https://api.weixin.qq.com/pay/orderquery?access_token=".$access_token;$result = https_request($url, $jsonmenu);var_dump($result);

完整代码如下所示：

include_once("WxPayHelper.php");//1. 获取access token$appid = "wx0000000000000000";$appsecret = "e76050733ce76050733ce76050733cdd";$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appid&secret=$appsecret";$result = https_request($url);$jsoninfo = json_decode($result, true);$access_token = $jsoninfo["access_token"];//2.准备参数$timestamp = time();$sign= strtoupper(md5("out_trade_no=JfuKdiBig4zZnE4n&partner=1234567890&key=asdfasdfasdfasdfasdfasdfasdfasdf"));$package = "out_trade_no=JfuKdiBig4zZnE4n&partner=1234567890&sign=".$sign;//2.1构造最麻烦的app_signature$obj['appid']          = "wx0000000000000000";$obj['appkey']         = "8mruTNOGeX8OVUlIYxIyw6kxCRvdJENpWpw8mruTNOGeX8OVUlIYxIyw6kxCRvdJENpWpw8mruTNOGeX8OVUlIYxIyw6kxCRvdJENpWpw8mruTNOGeX8OVUlIYxIyw6k";$obj['package']        = $package;$obj['timestamp']      = $timestamp;$WxPayHelper = new WxPayHelper();//get_biz_sign函数受保护，需要先取消一下，否则会报错$app_signature  = $WxPayHelper->get_biz_sign($obj);//3. 将构造的json提交给微信服务器，查询$jsonmenu = '{ "appid" : "wx0000000000000000", "package" : "'.$package.'", "timestamp" : "'.$timestamp.'", "app_signature" : "'.$app_signature.'", "sign_method" : "sha1"}';$url = "https://api.weixin.qq.com/pay/orderquery?access_token=".$access_token;$result = https_request($url, $jsonmenu);var_dump($result);function https_request($url, $data = null){ $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, $url); curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE); if (!empty($data)){     curl_setopt($curl, CURLOPT_POST, 1);     curl_setopt($curl, CURLOPT_POSTFIELDS, $data); } curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); $output = curl_exec($curl); curl_close($curl); return $output;}

三、订单结果

上述程序执行后，获得订单结果如下

{    "errcode": 0,    "errmsg": "ok",    "order_info": {        "ret_code": 0,        "ret_msg": "",        "input_charset": "GBK",        "trade_state": "0",        "trade_mode": "1",        "partner": "1234567890",        "bank_type": "CMB_FP",        "bank_billno": "201405273540085997",        "total_fee": "1",        "fee_type": "1",        "transaction_id": "1218614901201405273313473135",        "out_trade_no": "JfuKdiBig4zZnE4n",        "is_split": "false",        "is_refund": "false",        "attach": "",        "time_end": "20140527194139",        "transport_fee": "0",        "product_fee": "1",        "discount": "0",        "rmb_total_fee": ""    }}

各个字段的含义如表所示。

如果程序有误，会在errcode和errmsg描述出来。

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