纯手动打造微信H5网页内唤起微信完成支付，
底层操作类库
<?php
//微信H5支付类
//By:sevstudio
class WeiXinH5{
const _APPID = 'wx6910e78018a20000'; //公众账号ID
const _MCHID = '1502480000'; //商户号
const _KEY = 'FIvAYI2CkLvaJ2Ne3qYYriRLHx180000';//商户key
const _NOTIFY_URL = 'http://www.xxxx.net/m_weixin_notify.php'; //异步通知URL
const _WAP_URL = 'http://www.xxxx.net';
const _WAP_NAME = '名字';
//发起支付，返回唤起微信支付的URL，失败返回null
public function toPay($order_no,$total_fee,$body = 'test'){
$arr = array(
'appid' => self::_APPID,
'mch_id' => self::_MCHID,
'nonce_str' => $this->getNonceStr(),
'body' => $body,
'out_trade_no' => $order_no,
'total_fee' => $total_fee, //单位：分
'spbill_create_ip' => $this->get_client_ip(),
'notify_url' => self::_NOTIFY_URL,
'trade_type' => 'MWEB',
'scene_info' =>'{"h5_info": {"type":"Wap","wap_url": "'.self::_WAP_URL.'","wap_name": "'.self::_WAP_NAME.'"}}',
);
$info = $this->zidianxu($arr);//字典序
$info['sign'] = $this->md5sign($info);//签名
$xml = $this->ToXml($info);
$response = $this->curl_post("https://api.mch.weixin.qq.com/pay/unifiedorder",$xml);
//将微信返回的XML 转换成数组
//$objectxml = (array)simplexml_load_string($response, 'SimpleXMLElement', LIBXML_NOCDATA);
$objectxml = $this->FromXml($response);
if(!$objectxml || empty($objectxml['return_code']) || empty($objectxml['return_msg'])){
throw new Exception('通信失败');
}
if(empty($objectxml['mweb_url'])){
throw new Exception($objectxml['return_msg']);
}
return $objectxml['mweb_url']; //该URL可唤起微信支付窗口
}
//获取异步通知，完成基本信息校验
public function notify(){
if (!isset($GLOBALS['HTTP_RAW_POST_DATA'])) {
# 如果没有数据，直接返回失败
throw new Exception('没有数据来源');
}
$xml = $GLOBALS['HTTP_RAW_POST_DATA'];
$result = $this->FromXml($xml);
if(!$result || !is_array($result) || count($result) <1){
throw new Exception('数据转换失败');
}
if(empty($result['return_code']) || $result['return_code'] != 'SUCCESS'){
throw new Exception('通信标识失败');
}
//验证签名
$tmp = array();
foreach($result as $k=>$v){
if(!is_array($v) && $v != '' && $k != 'sign'){
$tmp[$k] = $v;
}
}
ksort($tmp);
$tmp_sign = $this->md5sign($tmp);
if($tmp_sign != $result['sign']){
throw new Exception('签名校验失败');
}
//基本信息校验
if($result['mch_id'] != self::_MCHID){
throw new Exception('商户ID校验失败');
}
return $result;
}
//告知微信可以停止异步通知了
public function stopNotify(){
$res = array(
'return_code' => 'SUCCESS',
'return_msg' => 'OK',
);
$txt = $this->ToXml($res);
header("Content-type:text/xml;charset=utf-8");
echo $res;
exit();
}
//查询订单支付结果
public function query($order_no){
$arr = array(
'appid' =>self::_APPID,
'mch_id' =>self::_MCHID,
'out_trade_no' =>$order_no,
'nonce_str' =>$this->getNonceStr()
);
$info = $this->zidianxu($arr);//字典序
$info['sign'] = $this->md5sign($info);//签名
$xml = $this->ToXml($info);
$response = $this->curl_post("https://api.mch.weixin.qq.com/pay/orderquery",$xml);
$result = $this->FromXml($response);
if(!$result || !is_array($result)){
throw new Exception('拉取支付结果失败');
}
if(empty($result['return_code']) || empty($result['return_msg'])){
throw new Exception('拉取支付结果通信失败');
}
if($result['return_code'] != 'SUCCESS'){
throw new Exception($result['return_msg']);
}
//验证签名
$tmp = array();
foreach($result as $k=>$v){
if(!is_array($v) && $v != '' && $k != 'sign'){
$tmp[$k] = $v;
}
}
ksort($tmp);
$tmp_sign = $this->md5sign($tmp);
if($tmp_sign != $result['sign']){
throw new Exception('签名验证失败');
}
return $result;
}
//获取随机字符串
public function getNonceStr($length = 32) {
$chars = "abcdefghijklmnopqrstuvwxyz0123456789";
$str ="";
for ( $i = 0; $i < $length; $i++ ) {
$str .= substr($chars, mt_rand(0, strlen($chars)-1), 1);
}
return $str;
}
//数组转xml格式
public function ToXml($data){
if(!is_array($data) || count($data) <= 0){
throw new WxPayException("数组数据异常！");
}
$xml = "<xml>";
foreach ($data 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 $xml
*/
public function FromXml($xml)
{
if(!$xml){
return null;
}
//将XML转为array
//禁止引用外部xml实体
libxml_disable_entity_loader(true);
return json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
}
//数组排序
public function zidianxu($arr){
/*
sort() - 以升序对数组排序
rsort() - 以降序对数组排序
asort() - 根据值，以升序对关联数组进行排序
ksort() - 根据键，以升序对关联数组进行排序
arsort() - 根据值，以降序对关联数组进行排序
krsort() - 根据键，以降序对关联数组进行排序
*/
ksort($arr);
return $arr;
}
//获取客户端IP
public function get_client_ip(){
if(isset($_SERVER)){
if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])){
$realip = $_SERVER['HTTP_X_FORWARDED_FOR'];
}elseif(isset($_SERVER['HTTP_CLIENT_IP'])){
$realip = $_SERVER['HTTP_CLIENT_IP'];
}else{
$realip = $_SERVER['REMOTE_ADDR'];
}
}else{
if(getenv("HTTP_X_FORWARDED_FOR")){
$realip = getenv( "HTTP_X_FORWARDED_FOR");
}elseif (getenv("HTTP_CLIENT_IP")){
$realip = getenv("HTTP_CLIENT_IP");
}else{
$realip = getenv("REMOTE_ADDR");
}
}
$arr = explode(",",trim($realip));
foreach($arr as $o){
if(preg_match("/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/",$o)){
return $o;
}
}
return "unknown";
}
//获取MD5签名
public function md5sign($info){
$str = '';
foreach($info as $k=>$v){
$str.= $str == '' ? "$k=$v":"&"."$k=$v";
}
$str.="&key=".self::_KEY;
return strtoupper(md5($str));
}
public function curl_post($postUrl,$data,$header = ""){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$postUrl);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
if(substr($postUrl,0,5) == "https"){
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
}
if(is_array($header) && count($header)>0){
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
}
$response = curl_exec($ch);
curl_close($ch);
return $response;
}
}
然后是业务操作部分，
$act = empty($_REQUEST['act']) ? '' : trim($_REQUEST['act']);
if($act == 'topay'){
$order_no = trim($_POST['order_no']);
$total_fee = intval($_POST['total_fee']);
$body = trim($_POST['body']);
$hp = new WeiXinH5();
$result = null;
try{
$result = $hp->toPay($order_no,$total_fee,$body);
}catch(Exception $e){
__log($e->getmessage());
ajax('失败');
}
ajax($result,true);
}else if($act == 'query'){
$order_no = trim($_POST['order_no']);
$hp = new WeiXinH5();
$result = null;
try{
$result = $hp->query($order_no);
}catch(Exception $e){
__log($e->getmessage());
ajax('订单支付失败');
}
if($result['trade_state'] != 'SUCCESS'){
ajax('订单支付失败');
}
$order = $con->find("select * from #__order where #__order.pay_no='{$result['out_trade_no']}'");
if(empty($order)){
ajax('订单信息不存在');
}
if(intval($order['status_pay']) == STATUS_PAY_YES){
ajax('订单已经支付');
}
if(intval($order['fee']) * 100 != intval($result['total_fee'])){
ajax('订单金额不匹配');
}
//更新订单信息
$time_pay = strtotime($result['time_end']);//订单完成支付的时间
//更新订单步骤，省略
ajax('订单支付成功',true);
}
ajax('');
function ajax($info,$flag=false){
$res = array(
'flag' => $flag,
'info' => $info,
);
echo json_encode($res); exit();
}
function __log($msg){
file_put_contents('log.txt',$msg."\t\t".date('YmdHis').PHP_EOL,FILE_APPEND);
}微信H5支付流程简要说明:
1、新建一个页面A，通过ajax请求上面的文件 act=topay，得到一个微信的URL地址；
2、在页面上A上弹出URL地址，同时显示中间页面如下图，即可唤起微信支付；
3、若支付流程走完，则默认会返回到页面A，可以选择点击上图中的第2/3行，点第2行则通过ajax请求上面的文件 act=query去抓取支付结果，并显示支付结果。当然可以点击第3行回到步骤1；
4、设置的notify页面只有在支付流程走完后才会去通知，如果支付没走完则不会通知，故需要通过步骤2种的图片所示进行引导查询支付结果。