微信支付统一下单及调起支付接口的php接口实现 (可以用于app集成)

<?php
/**
* 微信支付服务器端下单
* 微信APP支付文档地址:  https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=8_6 * 使用示例
*  构造方法参数
*      'appid'     =>  //填写微信分配的公众账号ID
*      'mch_id'    =>  //填写微信支付分配的商户号
*      'notify_url'=>  //填写微信支付结果回调地址
*      'key'       =>  //填写微信商户支付密钥
*  );
*  统一下单方法
*  $WechatAppPay = new wechatAppPay($options);
*  $params['body'] = '商品描述';                   //商品描述
*  $params['out_trade_no'] = '1217752501201407';   //自定义的订单号，不能重复
*  $params['total_fee'] = '100';                   //订单金额 只能为整数 单位为分
*  $params['trade_type'] = 'APP';                  //交易类型 JSAPI | NATIVE |APP | WAP
*  $wechatAppPay->unifiedOrder( $params );
*/
class wechatAppPay
{
//接口API URL前缀
const API_URL_PREFIX = 'https://api.mch.weixin.qq.com';
//下单地址URL
const UNIFIEDORDER_URL = "/pay/unifiedorder";
//查询订单URL
const ORDERQUERY_URL = "/pay/orderquery";
//关闭订单URL
const CLOSEORDER_URL = "/pay/closeorder";
//公众账号ID
private $appid;
//商户号
private $mch_id;
//随机字符串
private $nonce_str;
//签名
private $sign;
//商品描述
private $body;
//商户订单号
private $out_trade_no;
//支付总金额
private $total_fee;
//终端IP
private $spbill_create_ip;
//支付结果回调通知地址
private $notify_url;
//交易类型
private $trade_type;
//支付密钥
private $key;
//证书路径
private $SSLCERT_PATH;
private $SSLKEY_PATH;
//所有参数
private $params = array();
public function __construct($appid, $mch_id, $notify_url, $key)
{
$this->appid = $appid;
$this->mch_id = $mch_id;
$this->notify_url = $notify_url;
$this->key = $key;
}
/**
* 下单方法
* @param   $params 下单参数
*/
public function unifiedOrder( $params ){
$this->body = $params['body'];
$this->out_trade_no = $params['out_trade_no'];
$this->total_fee = $params['total_fee'];
$this->trade_type = $params['trade_type'];
$this->nonce_str = $this->genRandomString();
$this->spbill_create_ip = $_SERVER['REMOTE_ADDR'];
$this->params['appid'] = $this->appid;
$this->params['mch_id'] = $this->mch_id;
$this->params['nonce_str'] = $this->nonce_str;
$this->params['body'] = $this->body;
$this->params['out_trade_no'] = $this->out_trade_no;
$this->params['total_fee'] = $this->total_fee;
$this->params['spbill_create_ip'] = $this->spbill_create_ip;
$this->params['notify_url'] = $this->notify_url;
$this->params['trade_type'] = $this->trade_type;
//获取签名数据
$this->sign = $this->MakeSign( $this->params );
$this->params['sign'] = $this->sign;
$xml = $this->data_to_xml($this->params);
$response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::UNIFIEDORDER_URL);
if( !$response ){
return false;
}
$result = $this->xml_to_data( $response );
if( !empty($result['result_code']) && !empty($result['err_code']) ){
$result['err_msg'] = $this->error_code( $result['err_code'] );
}
return $result;
}
/**
* 查询订单信息
* @param $out_trade_no     订单号
* @return array
*/
public function orderQuery( $out_trade_no ){
$this->params['appid'] = $this->appid;
$this->params['mch_id'] = $this->mch_id;
$this->params['nonce_str'] = $this->genRandomString();
$this->params['out_trade_no'] = $out_trade_no;
//获取签名数据
$this->sign = $this->MakeSign( $this->params );
$this->params['sign'] = $this->sign;
$xml = $this->data_to_xml($this->params);
$response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::ORDERQUERY_URL);
if( !$response ){
return false;
}
$result = $this->xml_to_data( $response );
if( !empty($result['result_code']) && !empty($result['err_code']) ){
$result['err_msg'] = $this->error_code( $result['err_code'] );
}
return $result;
}
/**
* 关闭订单
* @param $out_trade_no     订单号
* @return array
*/
public function closeOrder( $out_trade_no ){
$this->params['appid'] = $this->appid;
$this->params['mch_id'] = $this->mch_id;
$this->params['nonce_str'] = $this->genRandomString();
$this->params['out_trade_no'] = $out_trade_no;
//获取签名数据
$this->sign = $this->MakeSign( $this->params );
$this->params['sign'] = $this->sign;
$xml = $this->data_to_xml($this->params);
$response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::CLOSEORDER_URL);
if( !$response ){
return false;
}
$result = $this->xml_to_data( $response );
return $result;
}
/**
*
* 获取支付结果通知数据
* return array
*/
public function getNotifyData(){
//获取通知的数据
$xml = $GLOBALS['HTTP_RAW_POST_DATA'];
$data = array();
if( empty($xml) ){
return false;
}
$data = $this->xml_to_data( $xml );
if( !empty($data['return_code']) ){
if( $data['return_code'] == 'FAIL' ){
return false;
}
}
return $data;
}
/**
* 接收通知成功后应答输出XML数据
* @param string $xml
*/
public function replyNotify(){
$data['return_code'] = 'SUCCESS';
$data['return_msg'] = 'OK';
$xml = $this->data_to_xml( $data );
echo $xml;
die();
}
/**
* 生成APP端支付参数
* @param  $prepayid   预支付id
*/
public function getAppPayParams( $prepayid ){
$data['appid'] = $this->appid;
$data['mch_id'] = $this->mch_id;
$data['prepayId'] = $prepayid;
$data['package'] = 'Sign=WXPay';
$data['nonce_str'] = $this->genRandomString();
$data['timestamp'] = time();
$data['sign'] = $this->MakeSign( $data );
$data['key'] = '5413A29BD915E1BCF870292FB4EC7852';
return $data;
}
/**
* 生成签名
*  @return 签名
*/
public function MakeSign( $params ){
//签名步骤一：按字典序排序数组参数
ksort($params);
$string = $this->ToUrlParams($params);
//签名步骤二：在string后加入KEY
$string = $string . "&key=".$this->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;
}

/**
* 将参数拼接为url: key=value&key=value
* @param   $params
* @return  string
*/
public function ToUrlParams( $params ){
$string = '';
if( !empty($params) ){
$array = array();
foreach( $params as $key => $value ){
$array[] = $key.'='.$value;
}
$string = implode("&",$array);
}
return $string;
}
/**
* 输出xml字符
* @param   $params     参数名称
* return   string      返回组装的xml
**/
public function data_to_xml( $params ){
if(!is_array($params)|| count($params) <= 0)
{
return false;
}
$xml = "<xml>";
foreach ($params as $key=>$val)
{
if (is_numeric($val)){
$xml.="<".$key.">".$val."</".$key.">";
}else{
$xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
}
}
$xml.="</xml>";
return $xml;
}
/**
* 将xml转为array
* @param string $xml
* return array
*/
public function xml_to_data($xml){
if(!$xml){
return false;
}
//将XML转为array
//禁止引用外部xml实体
libxml_disable_entity_loader(true);
$data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
return $data;
}
/**
* 获取毫秒级别的时间戳
*/
private static function getMillisecond(){
//获取毫秒的时间戳
$time = explode ( " ", microtime () );
$time = $time[1] . ($time[0] * 1000);
$time2 = explode( ".", $time );
$time = $time2[0];
return $time;
}
/**
* 产生一个指定长度的随机字符串,并返回给用户
* @param type $len 产生字符串的长度
* @return string 随机字符串
*/
private function genRandomString($len = 32) {
$chars = array(
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k",
"l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v",
"w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G",
"H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",
"S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2",
"3", "4", "5", "6", "7", "8", "9"
);
$charsLen = count($chars) - 1;
// 将数组打乱
shuffle($chars);
$output = "";
for ($i = 0; $i < $len; $i++) {
$output .= $chars[mt_rand(0, $charsLen)];
}
return $output;
}
/**
* 以post方式提交xml到对应的接口url
*
* @param string $xml  需要post的xml数据
* @param string $url  url
* @param bool $useCert 是否需要证书，默认不需要
* @param int $second   url执行超时时间，默认30s
* @throws WxPayException
*/
private function postXmlCurl($xml, $url, $useCert = false, $second = 30){
$ch = curl_init();
//设置超时
curl_setopt($ch, CURLOPT_TIMEOUT, $second);
curl_setopt($ch,CURLOPT_URL, $url);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,2);
//设置header
curl_setopt($ch, CURLOPT_HEADER, FALSE);
//要求结果为字符串且输出到屏幕上
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
if($useCert == true){
//设置证书
//使用证书：cert 与 key 分别属于两个.pem文件
curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');
//curl_setopt($ch,CURLOPT_SSLCERT, WxPayConfig::SSLCERT_PATH);
curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');
//curl_setopt($ch,CURLOPT_SSLKEY, WxPayConfig::SSLKEY_PATH);
}
//post提交方式
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
//运行curl
$data = curl_exec($ch);
//返回结果
if($data){
curl_close($ch);
return $data;
} else {
$error = curl_errno($ch);
curl_close($ch);
return false;
}
}
/**
* 错误代码
* @param  $code       服务器输出的错误代码
* return string
*/
public function error_code( $code ){
$errList = array(
'NOAUTH'                =>  '商户未开通此接口权限',
'NOTENOUGH'             =>  '用户帐号余额不足',
'ORDERNOTEXIST'         =>  '订单号不存在',
'ORDERPAID'             =>  '商户订单已支付，无需重复操作',
'ORDERCLOSED'           =>  '当前订单已关闭，无法支付',
'SYSTEMERROR'           =>  '系统错误!系统超时',
'APPID_NOT_EXIST'       =>  '参数中缺少APPID',
'MCHID_NOT_EXIST'       =>  '参数中缺少MCHID',
'APPID_MCHID_NOT_MATCH' =>  'appid和mch_id不匹配',
'LACK_PARAMS'           =>  '缺少必要的请求参数',
'OUT_TRADE_NO_USED'     =>  '同一笔交易不能多次提交',
'SIGNERROR'             =>  '参数签名结果不正确',
'XML_FORMAT_ERROR'      =>  'XML格式错误',
'REQUIRE_POST_METHOD'   =>  '未使用post传递参数 ',
'POST_DATA_EMPTY'       =>  'post数据不能为空',
'NOT_UTF8'              =>  '未使用指定编码格式',
);
if( array_key_exists( $code , $errList ) ){
return $errList[$code];
}
}
}




使用方法

<?php
include 'wechatAppPay.class.php';

class Application extends Controller
{
function __construct()
{
parent::__construct();
}

function Index()
{
$do = $this->input->request('do', 'trim');
if ($do == 'wxpay_notify') {
$this->wxpay_notify();
exit;
}

//1.统一下单方法
$appid = "wx0xxxxxxxx4a";
$mch_id = "12xxxxxx01";
$notify_url = "http://xxxx.com/?mod=pay&act=notfiyUrl";
$key = "5413A29BD915xxxxxx70292FB4EC7852";//
$wechatAppPay = new wechatAppPay($appid, $mch_id, $notify_url, $key);
$params['body'] = '商品充值';                       //商品描述
$params['out_trade_no'] = $this->ordersn();    //自定义的订单号
$params['total_fee'] = 1;                       //订单金额 只能为整数 单位为分
$params['trade_type'] = 'APP';                      //交易类型 JSAPI | NATIVE | APP | WAP
$result = $wechatAppPay->unifiedOrder($params);
//var_dump($result);die();
//print_r($result); // result中就是返回的各种信息信息，成功的情况下也包含很重要的prepay_id
//2.创建APP端预支付参数
/** @var TYPE_NAME $result */
$data = @$wechatAppPay->getAppPayParams($result['prepay_id']);
//下边为了拼够参数，多拼了几个给安卓、ios前端
$data['body'] = '充值';
$data['notify_url'] = $notify_url;
$data['total_fee'] = 1;
$data['success'] = 1;
$data['spbill_create_ip'] = '127.0.0.1';
$data['out_trade_no'] = $this->ordersn();
$data['trade_type'] = 'APP';

//var_dump($data);die();
// 根据上行取得的支付参数请求支付即可
//print_r($data);
BASETOOL::ajaxResponse($this->error['RETURN_SUCCESS']['code'], $data);
}

//定义商城的订单
function ordersn()
{
$yCode = array('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J');
$orderSn = $yCode[intval(date('Y')) - 2011] . strtoupper(dechex(date('m'))) . date('d') . substr(time(), -5) . substr(microtime(), 2, 5) . sprintf('%04d%02d', rand(1000, 9999), rand(0, 99));
return $orderSn;
}

/**
* 微信支付Notify
*/
function wxpay_notify()
{
//echo 'wxpay_notify';die();
//使用通用通知接口
$notify = new Notify_pub();

//存储微信的回调
$xml = $GLOBALS['HTTP_RAW_POST_DATA'];
$notify->saveData($xml);

//验证签名，并回应微信。
//对后台通知交互时，如果微信收到商户的应答不是成功或超时，微信认为通知失败，
//微信会通过一定的策略（如30分钟共8次）定期重新发起通知，
//尽可能提高通知的成功率，但微信不保证通知最终能成功。
if ($notify->checkSign() == FALSE) {
$notify->setReturnParameter("return_code", "FAIL");//返回状态码
$notify->setReturnParameter("return_msg", "签名失败");//返回信息
} else {
$notify->setReturnParameter("return_code", "SUCCESS");//设置返回码
}
$returnXml = $notify->returnXml();
echo $returnXml;

//==商户根据实际情况设置相应的处理流程，此处仅作举例=======

//以log文件形式记录回调信息

$log_type = "wxpay_notify";//log文件路径
$this->log_result($log_type, "【接收到的notify通知】:\n" . $xml . "\n");

if ($notify->checkSign() == TRUE) {
if ($notify->data["return_code"] == "FAIL") {
//此处应该更新一下订单状态，商户自行增删操作
$this->log_result($log_type, "【通信出错】:\n" . $xml . "\n");
} elseif ($notify->data["result_code"] == "FAIL") {
//此处应该更新一下订单状态，商户自行增删操作
$this->log_result($log_type, "【业务出错】:\n" . $xml . "\n");
} else {
//此处应该更新一下订单状态，商户自行增删操作
$this->log_result($log_type, "【支付成功】:\n" . $xml . "\n");
$out_trade_no = $notify->data['out_trade_no'];
$trade_no = $notify->data['transaction_id'];

$order = $this->order_model->get_order_info($out_trade_no);
//echo "trade_no: $trade_no
//out_trade_no: $out_trade_no";print_r($order);
if ($order['TradeStatus'] != 'TRADE_FINISHED' && $order['TradeStatus'] != 'TRADE_SUCCESS') {
// $data = array('TradeStatus'=>'TRADE_SUCCESS','TradeNo'=>$trade_no,'PayTime'=>time(),'PayType'=>'wxpay');
// $this->order_model->update_order_info($out_trade_no,$data);
}
}

}
}
}

?>





关于支付成功后，如何更新用户的东西，比如说，充值100。更新订单状态。 并要给相应的user_id加入充值记录。 可以在之前生成订单的时候，用 “订单号-userid”方式
来做，回调时拆分-后边的就是user_id