微信小程序调用微信支付
把标注红色的修改即可
js文件：
wx.login({
success: res => {
var total_fee = 1 //总金额
// 发送 res.code 到后台换取 openId, sessionKey, unionId
wx.request({
url: "http://127.0.0.1/api/Pay/login", //请求地址
data: { code: res.code },
header: {
'content-type': 'application/json'
},
success(res) {
//发起预支付，获取所需参数
wx.request({
url: 'http://127.0.0.1/api/Pay/recharge', //请求地址
data: {
openid: res.data['openid'],
total_fee: total_fee, //总金额
body: '充值拼购卡', //充值标题
},
method: 'POST',
success(res) {
console.log(res)
if (res.errMsg == 'request:ok') {
//发起微信支付
wx.requestPayment({
timeStamp: res.data.timeStamp,
nonceStr: res.data.nonceStr,
package: res.data.package,
signType: res.data.signType,
paySign: res.data.paySign,
success(r) {
console.log(r)
//写支付成功的逻辑
},
fail(r) {
wx.showToast({
title: '取消支付',
icon: 'none'
})
}
})
} else {
wx.showToast({
title: res.data.data,
icon: 'none'
})
}
}
})
}
})
}
})
},
php文件：
/*支付成功回调*/
public function getnotify(){
$testxml = file_get_contents("php://input");
$jsonxml = json_encode(simplexml_load_string($testxml, 'SimpleXMLElement', LIBXML_NOCDATA));
$result = json_decode($jsonxml, true);//转成数组，
if($result){
//如果成功返回了
$out_trade_no = $result['out_trade_no'];
if($result['return_code'] == 'SUCCESS' && $result['result_code'] == 'SUCCESS'){
//执行业务逻辑
}
}
}
/*获取用户唯一标识*/
public function login(){
$code=Request::param('code');
$url="https://api.weixin.qq.com/sns/jscode2session?appid=wx69b37be568f76e3f&secret=b6ed8d48484522da769e6980fb6d5684&js_code=".$code."&grant_type=authorization_cod";
$token = json_decode($this->curl_get($url));
return json($token);
}
/*支付*/
public function recharge(){
$data=Request::post();
$fee = $data['total_fee'];//金额
$appid ='wx69b37be*****';//appid
$body =$data['body']; //标题
$mch_id ='15668****';//商户号
$nonce_str =$this->nonce_str();//随机字符串
$notify_url ='http://127.0.0.1/api/Pay/getnotify'; //回调的url【自己填写】
$openid =$data['openid'];
$out_trade_no = $this->order_number($openid);//商户订单号RETURN_CODE
$spbill_create_ip = '**.***.**.***';//服务器的ip【自己填写】;
$total_fee = $fee*100;// 微信支付单位是分，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
$post['trade_type'] = $trade_type;
$sign = $this->sign($post);//签名
// return json($sign);
$post_xml = '<xml>
<appid>'.$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> ';
// print_r($post_xml);die;
//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
// print_r($array);die;
if($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'] = 200;
$data['timeStamp'] = "$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);
}
//随机32位字符串
private function nonce_str(){
$result = '';
$str = 'QWERTYUIOPASDFGHJKLZXVBNMqwertyuioplkjhgfdsamnbvcxz';
for ($i=0;$i<32;$i++){
$result .= $str[rand(0,48)];
}
return $result;
}
//生成订单号
private function order_number($openid){
//date('Ymd',time()).time().rand(10,99);//18位
return md5($openid.time().rand(10,99));//32位
}
//签名 $data要先排好顺序
private function sign($data){
//签名步骤一：按字典序排序数组参数
// ksort($data);
$stringA = '';
foreach ($data as $key=>$value){
if(!$value) continue;
if($stringA) $stringA .= '&'.$key."=".$value;
else $stringA = $key."=".$value;
}
$wx_key = 'TangvgIBADANBgkqhkiG9*******';//申请支付后有给予一个商户账号和密码，登陆后自己设置的key
$stringSignTemp = $stringA.'&key='.$wx_key;
return strtoupper(md5($stringSignTemp));
}
//curl请求
public function http_request($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 $output;
}
//获取xml
private function xml($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 $data;
}
/*往微信发送信息，获取唯一标识
后台调用 避免暴露 信息*/
function curl_get($url,&$httpCode = 0){
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
/*不做证书效验，部署在linux环境下请改为true*/
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,10);
$file_contents = curl_exec($ch);
$httpCode = curl_getinfo($ch,CURLINFO_HTTP_CODE);
curl_close($ch);
return $file_contents;
}
protected function get_json($url)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$output = curl_exec($ch);
curl_close($ch);
return json_decode($output, true);
}
