private $appid = "" ;
private $secret = "";
private $mch_id = '';
private $key = '';
private $openid = '';
public function index(){
$this->load->library('wxpay');
$code = $this->input->post("code");
$total_fee = $this->input->post("total_fee");
$total_fee = $total_fee?:1;
//获取openid
if($code)
{
$WX_APPID = $this->appid;
$WX_SECRET = $this->secret;
$url = "https://api.weixin.qq.com/sns/jscode2session?appid=" . $WX_APPID . "&secret=" . $WX_SECRET . "&js_code=" . $code . "&grant_type=authorization_code";
$infos = json_decode(file_get_contents($url));
$openid = $infos->openid;
}
if(!$openid){
$openid = $this->openid();
}
$appid = $this->appid;//如果是公众号 就是公众号的appid
$body = '小程序支付';
$mch_id = $this->mch_id;
$nonce_str = $this->nonce_str();//随机字符串
$notify_url = 'test';
$openid = $openid;
$out_trade_no = time();//商户订单号
$spbill_create_ip = '127.0.0.1';
$total_fee = $total_fee;//因为充值金额最小是1 而且单位为分 如果是充值1元所以这里需要*100
$trade_type = 'JSAPI';//交易类型 默认
//这里是按照顺序的 因为下面的签名是按照顺序 排序错误 肯定出错
$post['appid'] = $appid;
$post['body'] = $body;
$post['mch_id'] = $mch_id;
$post['nonce_str'] = $nonce_str;//随机字符串
$post['notify_url'] = $notify_url;
$post['openid'] = $openid;
$post['out_trade_no'] = $out_trade_no;
$post['spbill_create_ip'] = $spbill_create_ip;//终端的ip
$post['total_fee'] = $total_fee;//总金额 最低为一块钱 必须是整数
$post['trade_type'] = $trade_type;
$sign = $this->sign($post);//签名
$post_xml = '<xml>
<appid>'.$appid.'</appid>
<body>'.$body.'</body>
<mch_id>'.$mch_id.'</mch_id>
<nonce_str>'.$nonce_str.'</nonce_str>
<notify_url>'.$notify_url.'</notify_url>
<openid>'.$openid.'</openid>
<out_trade_no>'.$out_trade_no.'</out_trade_no>
<spbill_create_ip>'.$spbill_create_ip.'</spbill_create_ip>
<total_fee>'.$total_fee.'</total_fee>
<trade_type>'.$trade_type.'</trade_type>
<sign>'.$sign.'</sign>
</xml> ';
//统一接口prepay_id
$url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
$xml = $this->http_request($url,$post_xml);
$array = $this->xml($xml);//全要大写
if($array['RETURN_CODE'] == 'SUCCESS' && $array['RESULT_CODE'] == 'SUCCESS'){
$time = time();
$tmp='';//临时数组用于签名
$tmp['appId'] = $appid;
$tmp['nonceStr'] = $nonce_str;
$tmp['package'] = 'prepay_id='.$array['PREPAY_ID'];
$tmp['signType'] = 'MD5';
$tmp['timeStamp'] = "$time";
$data['state'] = 1;
$data['timeStamp'] = "$time";//时间戳
$data['nonceStr'] = $nonce_str;//随机字符串
$data['signType'] = 'MD5';//签名算法，暂支持 MD5
$data['package'] = 'prepay_id='.$array['PREPAY_ID'];//统一下单接口返回的 prepay_id 参数值，提交格式如：prepay_id=*
$data['paySign'] = $this->sign($tmp);//签名,具体签名方案参见微信公众号支付帮助文档;
$data['out_trade_no'] = $out_trade_no;
}else{
$data['state'] = 0;
$data['text'] = "错误";
$data['RETURN_CODE'] = $array['RETURN_CODE'];
$data['RETURN_MSG'] = $array['RETURN_MSG'];
}
echo json_encode($data); //小程序需要的数据 返回前端
}
public function sign($data){
$stringA = '';
foreach ($data as $key=>$value){
if(!$value) continue;
if($stringA) $stringA .= '&'.$key."=".$value;
else $stringA = $key."=".$value;
}
$wx_key = $this->key;//申请支付后有给予一个商户账号和密码，登陆后自己设置key
$stringSignTemp = $stringA.'&key='.$wx_key;//申请支付后有给予一个商户账号和密码，登陆后自己设置key
return strtoupper(md5($stringSignTemp));
}
public function nonce_str(){
$result = '';
$str = 'QWERTYUIOPASDFGHJKLZXVBNMqwertyuioplkjhgfdsamnbvcxz';
for ($i=0;$i<32;$i++){
$result .= $str[rand(0,48)];
}
return $result;
}
function http_request($url,$data = null,$headers=array())
{
$curl = curl_init();
if( count($headers) >= 1 ){
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
}
curl_setopt($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 $output;
}
private function xml($xml){
$p = xml_parser_create();
xml_parse_into_struct($p, $xml, $vals, $index);
xml_parser_free($p);
$data = "";
foreach ($index as $key=>$value) {
if($key == 'xml' || $key == 'XML') continue;
$tag = $vals[$value[0]]['tag'];
$value = $vals[$value[0]]['value'];
$data[$tag] = $value;
}
return $data;
}
payStart:function(){
var total_fee = total_fee;
wx.login({
success: res => {
//code 用于获取openID的条件之一
var code = res.code;
wx.request({
url: 'http://xxx/xx/x',
method: "POST",
data: {
total_fee:2,
code: code,
},
header: {
'content-type': 'application/x-www-form-urlencoded' // 默认值
},
success: function (res) { //后端返回的数据
var data = res.data;
console.log(data);
console.log(data["timeStamp"]);
wx.requestPayment({
timeStamp: data['timeStamp'],
nonceStr: data['nonceStr'],
package: data['package'],
signType: data['signType'],
paySign: data['paySign'],
success: function (res) {
wx.showModal({
title: '支付成功',
content: '',
})
},
fail: function (res) {
console.log(res);
}
})
}
});
}
})
}
