PHP实现微信小程序在线支付功能(代码实例)

更新时间:2023-04-08 15:24:00 阅读：评论：0

小程序访问地址：payfee.php如果使用tp框架处理后台的话，写成方法即可

include 'weixinpay.php';$appid=''; //小程序appid$openid= $_post['id'];$mch_id=''; //微信支付商户支付号$key=''; //api密钥$out_trade_no = $mch_id. time();$total_fee = $_post['fee'];if (empty($total_fee)) { //押金  $body = "充值押金";  $total_fee = floatval(9领略什么9*100);} el {   $body = "充值余额";   $total_fee = floatval($total_fee*100); }$weixinpay = new weixinpay($appid,$openid,$mch_id,$key,$out_trade_no,$body,$total_fee);$return=$weixinpay->pay();echo json_encode($return);

weixinpay.php微信小程序支付类所有微信小程序需要的参数都已经写入

/* * 小程序微信支付 */class weixinpay {  protected $appid;  protected $mch_id;  protected $key;  protected $openid;  protected $out_trade_no;  protected $body;  protected $total_fee;  function __construct($appid, $openid, $mch_id, $key,$out_trade_no,$body,$total_fee) {    $this->appid = $appid;    $this->open黄河花园口id = $openid;    $this->mch_id = $mch_id;    $this->key = $key;    $this->out_trade_no = $out_trade_no;    $this->body = $body;    $this->total_fee = $total_fee;  }  public function pay() {    //统一下单接口    $return = $this->weixinapp();    return $return;  }  //统一下单接口  private function unifiedorder() {    $url = '/d/file/titlepic/unifiedorder';    $parameters = array(      'appid' => $this->appid, //小程序id      'mch_id' => $this->mch_id, //商户号      'nonce_str' => $this->createnoncestr(), //随机字符串//      'body' => 'test', //商品描述      'body' => $this->body,//      'out_trade_no' => '2018013106125348', //商户订单号      'out_trade_no'=> $this->out_trade_no,//      'total_fee' => floatval(0.01 * 100), //总金额 单位 分      'total_fee' => $this->total_fee,      'spbill_create_ip' => $_rver['remote_addr'], //终端ip      // 'spbill_create_ip' => '192.168.0.161', //终端ip      'notify_url' => 'https://www.weixin.qq.com/wxpay/notify.php', //通知地址 确保外网能正常访问      'openid' => $this->openid, //用户id      'trade_type' => 'jsapi'//交易类型    );    //统一下单签名    $parameters['sign'] = $this->getsign($parameters);    $xmldata = $this->a财务会计和管理会计rraytoxml($parameters);    $return = $this->xmltoarray($this->postxmlcurl($xmldata, $url, 60));    return $return;  }  private static function postxmlcurl($xml, $url, $cond = 30)   {    $ch = curl_init();    //设置超时    curl_topt($ch, curlopt_timeout, $cond);    curl_topt($ch, curlopt_url, $url);    curl_topt($ch, curlopt_ssl_verifypeer, fal);    curl_topt($ch, curlopt_ssl_verifyhost, fal); //严格校验    //设置header    curl_topt($ch, curlopt_header, fal);    //要求结果为字符串且输出到屏幕上    curl_topt($ch, curlopt_returntransfer, true);    //post提交方式    curl_topt($ch, curlopt_post, true);    curl_topt($ch, curlopt_postfields, $xml);    curl_topt($ch, curlopt_connecttimeout, 20);    curl_topt($ch, curlopt_timeout, 40);    t_time_limit(0);    //运行curl    $data = curl_exec($ch);    //返回结果    if ($data) {      curl_clo($ch);      return $data;    } el {      $error = curl_errno($ch);      curl_clo($ch);      throw new wxpayexception("curl出错，错误码:$error");    }  }  //数组转换成xml  private function arraytoxml($arr) {    $xml = "<xml>";    foreach ($arr as $key => $val) {      if (is_array($val)) {        $xml .= "<" . $key . ">" . arraytoxml($val) . "</" . $key . ">";      } el {        $xml .= "<" . $key . ">" . $val . "</" . $key . ">";      }    }    $xml .= "</xml>";    return $xml;  }  //xml转换成数组  private function xmltoarray($xml) {    //禁止引用外部xml实体     libxml_disable_entity_loader(true);    $xmlstring = simplexml_load_string($xml, 'simplexmlelement', libxml_no爷爷为我打月饼伴奏cdata);    $val = json_decode(json_encode($xmlstring), true);    return $val;  }  //微信小程序接口  private function weixinapp() {    //统一下单接口    $unifiedorder = $this->unifiedorder();//    print_r($unifiedorder);    $parameters = array(      'appid' => $this->appid, //小程序id      'timestamp' => '' . time() . '', //时间戳      'noncestr' => $this->createnoncestr(), //随机串      'package' => 'prepay_id=' . $unifiedorder['prepay_id'], //数据包      'signtype' => 'md5'//签名方式    );    //签名    $parameters['paysign'] = $this->getsign($parameters);    return $parameters;  }  //作用：产生随机字符串，不长于32位  private function createnoncestr($length = 32) {    $chars = "abcdefghijklmnopqrstuvwxyz0123456789";    $str = "";    for ($i = 0; $i < $length; $i++) { $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); } return $str; } //作用：生成签名 private function getsign($obj) { foreach ($obj as $k => $v) {      $parameters[$k] = $v;    }    //签名步骤一：按字典序排序参数    ksort($parameters);    $string = $this->formatbizqueryparamap($parameters, fal);    //签名步骤二：在string后加入key    $string = $string . "&key=" . $this->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 $result_;  }  ///作用：格式化参数，签名过程需要使用  private function formatbiz莺queryparamap($paramap, $urlencode) {    $buff = "";    ksort($paramap);    foreach ($paramap as $k => $v) {      if ($urlencode) {        $v = urlencode($v);      }      $buff .= $k . "=" . $v . "&";    }    $reqpar = '';    if (strlen($buff) > 0) {      $reqpar = substr($buff, 0, strlen($buff) - 1);    }    return $reqpar;  }}

小程序页面请求处理：

wx.request({   url: 'https://yourhost.com/wxpay/payfee.php',//改成你自己的链接   data:{    id: app.globaldata.openid,//获取用户openid    fee:100 //商品价格   },   header: {    'content-type': 'application/x-www-form-urlencoded'   },   method: 'post',   success: function (res) {    console.log(res.data);    console.log('调起支付');    wx.requestpayment({     'timestamp': res.data.timestamp,     'noncestr': res.data.noncestr,     'package': res.data.package,     'signtype': 'md5',     'paysign': res.data.paysign,     'success': function (res) {      console.log('success');      wx.showtoast({       title: '支付成功',       icon: 'success',       duration: 3000      });     },     'fail': function (res) {      console.log(res);     },     'complete': function (res) {      console.log('complete');     }    });   },   fail: function (res) {    console.log(res.data)   }  });

回调url：notify.php

$postxml = $globals["http_raw_post_data"]; //接收微信参数 // 接受不到参数可以使用file_get_contents("php://input"); php高版本中$globals好像已经被废弃了if (empty($postxml)) {  return fal;} //将xml格式转换成数组function xmltoarray($xml) {  //禁止引用外部xml实体   libxml_disable_entity_loader(true);  $xmlstring = simplexml_load_string($xml, 'simplexmlelement', libxml_nocdata);  $val = json_decode(json_encode($xmlstring), true);  return $val;}$attr = xmltoarray($postxml);$total_fee = $attr['total_fee'];$open_id = $attr['openid'];$out_trade_no = $attr['out_trade_no'];$time = $attr['time_end'];

so：在微信的异步通知后，也需要给微信服务器，返回一个信息，只不过微信的所有数据格式都是xml的，所以我们在返回一个数据给微信即可。