前端html页面：
前端js页面：
submitOrder: function () {
let _this=this;
App._get('pay/answer_payment', {
open_id: _this.data.open_id,
total_price: _this.data.total_price,
},
function (result) {
var data=result;
console.log(data);
// 发起微信支付
wx.requestPayment({
timeStamp: data['timeStamp'],
nonceStr: data['nonceStr'],
package: data['package'],
signType: 'MD5',
paySign: data['paySign'],
success: function (res) {
App._get('book/orderSave',
{
user_id: _this.data.user_id,
book_id: _this.data.book_id,
book_content: _this.data.book_content,
cost: _this.data.total_price,
out_trade_no: data['out_trade_no'],
} function (result) {
保存订单成功；
});
App._get('book/mybook',
{
user_id: _this.data.user_id,
book_id: _this.data.book_id,
},
function (result) {
加入书包成功；
});
wx.navigateBack();
},
fail: function () {
App.showError('订单未支付', function () {
});
},
});
});
},
后台开发者服务器代码：
public function answer_payment(){
$open_id = $_GET['open_id'];
$total_price = $_GET['total_price'];
$fee = $total_price;//支付费用
$appid = 'wxdebe20dae6829f79';
$body = '书云';
$mch_id = '1541638811'; //商户号
$nonce_str = $this->nonce_str();//随机字符串
$notify_url = 'https://www.weixin.qq.com/wxpay/notify.php'; //回调的url
$openid = $open_id;
$out_trade_no = $this->order_number($open_id);//商户订单号
$spbill_create_ip ='101.132.72.105';
$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
$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
$post_xml = '
<appid>'.$appid.'
<body>'.$body.'
<mch_id>'.$mch_id.'
<nonce_str>'.$nonce_str.'
<notify_url>'.$notify_url.'
<openid>'.$openid.'
<out_trade_no>'.$out_trade_no.'
<spbill_create_ip>'.$spbill_create_ip.'
<total_fee>'.$total_fee.'
<trade_type>'.$trade_type.'
<sign>'.$sign.'
</xml> ';
$url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
$xml = $this->http_request($url,$post_xml);
$array = $this->fromXml($xml);
//var_dump($array);
if($array['return_code'] == 'SUCCESS' && $array['return_code'] == 'SUCCESS'){
$time = time();
$tmp=array();//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
$data['package'] = 'prepay_id='.$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
$data['out_trade_no'] = $out_trade_no;
}else{
$data['state'] = 0;
$data['text'] = "错误";
$data['RETURN_CODE'] = $array['result_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 $result;
}
private function order_number($openid){
return 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){
$stringA = '';
foreach ($data as $key=>$value){
if(!$value) continue;
if($stringA) $stringA .= '&'.$key."=".$value;
else $stringA = $key."=".$value;
}
$wx_key = 'cdsykjyxgs1688510107199101244217';
$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 $data;
}
private function fromXml($xml)
{
// 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);
}
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