PHP实现⼩程序在线⽀付功能（代码实例）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=''; //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(99*100);
} else {
$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⼩程序⽀付类所有⼩程序需要的参数都已经写⼊
/*
* ⼩程序⽀付
*/
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->openid = $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 = 'h.weixin.qq/pay/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' => $_SERVER['REMOTE_ADDR'], //终端IP
// 'spbill_create_ip' => '192.168.0.161', //终端IP
'notify_url' => 'www.weixin.qq/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 = $this->arrayToXml($parameters);
$return = $this->xmlToArray($this->postXmlCurl($xmlData, $url, 60));
return $return;
}
private static function postXmlCurl($xml, $url, $second = 30)
{
$ch = curl_init();
//设置超时
curl_setopt($ch, CURLOPT_TIMEOUT, $second);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //严格校验
/
/设置header
curl_setopt($ch, CURLOPT_HEADER, FALSE);
//要求结果为字符串且输出到屏幕上
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
//post提交⽅式
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
curl_setopt($ch, CURLOPT_TIMEOUT, 40);
set_time_limit(0);
//运⾏curl
$data = curl_exec($ch);
//返回结果
if ($data) {
curl_close($ch);
return $data;
} else {
$error = curl_errno($ch);
curl_close($ch);
throw new WxPayException("curl出错，错误码:$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 . ">";
} else {
$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_NOCDATA);
$val = json_decode(json_encode($xmlstring), true);
return $val;
}
//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, false);
//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);
写文章的小程序//签名步骤四：所有字符转为⼤写
$result_ = strtoupper($String);
return $result_;
}
/
//作⽤：格式化参数，签名过程需要使⽤
private function formatBizQueryParaMap($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：
url: 'yourhost/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');
'timeStamp': res.data.timeStamp,
'nonceStr': Str,
'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($postXml)) {
return false;
}
//将xml格式转换成数组
function xmlToArray($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：在的异步通知后，也需要给服务器，返回⼀个信息，只不过的所有数据格式都是xml的，所以我们在返回⼀个数据给即可。
echo exit('<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>');
总结
到此这篇关于PHP⼩程序在线⽀付功能的⽂章就介绍到这了，更多相关php ⼩程序在线⽀付内容请搜索以前的⽂章或继续浏览下⾯的相关⽂章希望⼤家以后多多⽀持！

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