1、服务器端使用TP3.2处理（随便写在一个Controller里面）
/* 小程序报名，生成订单 */public function make_order(){if(IS_POST){$data['openid'] = I('POST.openid');$data_total = I('POST.data_total');$data['crsNo'] = 'W'.date('YmdHis',time()).'-'.randomkeys(2);$insertId = M('home_order','xxf_witkey_')->add($data);if($insertId){$this->insertID = $insertId;$this->data_total = $data_total*100; //订单总金额，单位分/* 调用微信【统一下单】 */$this->pay($data_total*100,$data['openid'],$data['crsNo']);}else{echo $insertId;}//echo json_encode($re); }}
/* 首先在服务器端调用微信【统一下单】接口，返回prepay_id和sign签名等信息给前端，前端调用微信支付接口 */private function Pay($total_fee,$openid,$order_id){if(empty($total_fee)){echo json_encode(array('state'=>0,'Msg'=>'金额有误'));exit;}if(empty($openid)){echo json_encode(array('state'=>0,'Msg'=>'登录失效，请重新登录(openid参数有误)'));exit;}if(empty($order_id)){echo json_encode(array('state'=>0,'Msg'=>'自定义订单有误'));exit;}$appid = '小程序appid';//如果是公众号 就是公众号的appid;小程序就是小程序的appid$body = '自己填';$mch_id = '商户账号';$KEY = '你申请微信支付的key';$nonce_str = randomkeys(32);//随机字符串$notify_url = 'https://m.******.com/index.php/Home/Xiaoxxf/xiao_notify_url'; //支付完成回调地址url,不能带参数$out_trade_no = $order_id;//商户订单号$spbill_create_ip = $_SERVER['SERVER_ADDR'];$trade_type = 'JSAPI';//交易类型 默认JSAPI//这里是按照顺序的 因为下面的签名是按照(字典序)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'] = $spbill_create_ip;//服务器终端的ip$post['total_fee'] = intval($total_fee); //总金额 最低为一分钱 必须是整数$post['trade_type'] = $trade_type;$sign = $this->MakeSign($post,$KEY); //签名$this->sign = $sign;$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>'.$sign.'</sign></xml> ';//统一下单接口prepay_id$url = 'https://api.mch./pay/unifiedorder';$xml = $this->http_request($url,$post_xml);//POST方式请求http$array = $this->xml2array($xml);//将【统一下单】api返回xml数据转换成数组，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'] = $this->MakeSign($tmp,$KEY); //签名,具体签名方案参见微信公众号支付帮助文档;$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);}/*** 生成签名, $KEY就是支付key* @return 签名*/public function MakeSign( $params,$KEY){//签名步骤一：按字典序排序数组参数ksort($params);$string = $this->ToUrlParams($params); //参数进行拼接key=value&k=v//签名步骤二：在string后加入KEY$string = $string . "&key=".$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;}/*** 调用接口， $data是数组参数* @return 签名*/public function http_request($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 $output;}//获取xml里面数据，转换成arrayprivate function xml2array($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;}
/*** 将xml转为array* @param string $xml* return array*/public function xml_to_array($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 $data;}
//还有就是，微信要求支付后处理微信发送的回调内容，就是告诉商户，订单交易成功了，你要发送‘我知道了’给微信。
//还有一点就是：这里就是回调url，你预支付填写的notify_url地址。废话不多说，看下面
/* 微信支付完成，回调地址url方法 xiao_notify_url() */public function xiao_notify_url(){$post = post_data(); //接受POST数据XML个数
/*
function post_data(){
$receipt = $_REQUEST;
if($receipt==null){
$receipt = file_get_contents("php://input");
if($receipt == null){
$receipt = $GLOBALS['HTTP_RAW_POST_DATA'];
}
}
return $receipt;
}
*/
$post_data = $this->xml_to_array($post); //微信支付成功，返回回调地址url的数据：XML转数组Array$postSign = $post_data['sign'];unset($post_data['sign']);/* 微信官方提醒：* 商户系统对于支付结果通知的内容一定要做【签名验证】,* 并校验返回的【订单金额是否与商户侧的订单金额】一致，* 防止数据泄漏导致出现“假通知”，造成资金损失。*/ksort($post_data);// 对数据进行排序$str = $this->ToUrlParams($post_data);//对数组数据拼接成key=value字符串$user_sign = strtoupper(md5($post_data)); //再次生成签名，与$postSign比较$where['crsNo'] = $post_data['out_trade_no'];$order_status = M('home_order','xxf_witkey_')->where($where)->find();if($post_data['return_code']=='SUCCESS'&&$postSign){/** 首先判断，订单是否已经更新为ok，因为微信会总共发送8次回调确认* 其次，订单已经为ok的，直接返回SUCCESS* 最后，订单没有为ok的，更新状态为ok，返回SUCCESS*/if($order_status['order_status']=='ok'){$this->return_success();}else{$updata['order_status'] = 'ok';if(M('home_order','xxf_witkey_')->where($where)->save($updata)){$this->return_success();}}}else{echo '微信支付失败';}}/** 给微信发送确认订单金额和签名正确，SUCCESS信息 -xzz0521*/private function return_success(){$return['return_code'] = 'SUCCESS';$return['return_msg'] = 'OK';$xml_post = '<xml><return_code>'.$return['return_code'].'</return_code><return_msg>'.$return['return_msg'].'</return_msg></xml>';echo $xml_post;exit;}
2、小程序端发起下单和支付请求：
/*** 自定义方法，校验form数据*/submitForm: function (e) {//这里是小程序wxml提交formvar that = this;
//#code ，注意这里的form数据你要校验哦。wx.request({url: 'https://m.******.com/index.php/Home/Xiaoxxf/make_order',header: {"Content-Type": "application/x-www-form-urlencoded"},method: "POST",data: { openid: wx.getStorageSync('openid'), data_name: e.detail.value.data_name, data_phone: e.detail.value.data_phone, data_IDcard: e.detail.value.data_IDcard, data_num: e.detail.value.data_num, data_addr: e.detail.value.data_addr, data_remark: e.detail.value.data_remark, data_total: e.detail.value.data_num * that.data.unitPrice,a_id:that.data.a_id},success: function (res) {if (res.data.state==1) {// --------- 订单生成成功，发起支付请求 ------------------ wx.requestPayment({ timeStamp: res.data.timeStamp,nonceStr: res.data.nonceStr, //字符串随机数 package: res.data.package,signType: res.data.signType,paySign: res.data.paySign,'success': function (res) {console.log(res.errMsg); //requestPayment:ok==>调用支付成功 wx.showToast({title: '报名成功',//这里打印出报名成功icon: 'success',duration: 1000})},'fail': function (res) { console.log(res.errMsg);},'complete': function (res) {console.log(res.errMsg);}})} else if (res.data.state == 0){wx.showToast({title: res.data.Msg,icon: 'fail',duration: 1000})}else{wx.showToast({title: '系统繁忙，请稍后重试~',icon: 'fail',duration: 1000})}}})}
