php 微信小程序支付代码实例
public function pay(){
//获取openid
if($_GET['code']){ //用code获取openid
$code=$_GET['code'];
$WX_APPID =C('WX_APPID');//appid
$WX_SECRET = C('WX_SECRET');//AppSecret
$url = "https://api.weixin.qq.com/sns/jscode2session?appid=" .$WX_APPID. "&secret=" .$WX_SECRET. "&js_code=" .$code. "&grant_type=authorization_code";
$infos = json_decode(file_get_contents($url));
$openid = $infos->openid;
}
if($_GET['uid']){
$where['id']=$_GET['uid'];
}
$oid=$_GET['oid'];
//$fee = $_GET['price'];
$fee = 0.01;//举例支付0.01
$time = time();
$out_trade_no=$this->order_number($openid);
$param = array(
'appid' => '',//小程序id
'mch_id'=>'1247127301',//商户 idC('WX_ID')
'spbill_create_ip'=>$_SERVER['REMOTE_ADDR'],//终端ip
'notify_url'=>'http://bzl.isoft.mobi/index.php/Home/Pay/notify', //回调通知地址
'nonce_str'=> $this->createNoncestr(),//随机字符串
'out_trade_no'=>$out_trade_no,//商户订单编号
'total_fee'=>$fee*100, //总金额
'openid'=>$openid,//用户openid
'trade_type'=>'JSAPI',//交易类型
'body' =>'XXX消费', //商品信息
);
$aa['id']=$oid;
$da['out_trade_no']=$out_trade_no;
$order =M('order')->where($aa)->save($da); //给订单里生成订单编号
//通过签名算法计算得出的签名值，详见签名生成算法
$param['sign'] = $this->getSign($param);
//var_dump($param);die;
//将数组内容转为xml格式，向微信发出请求
$xmlData = $this->arrayToXml($param);
$xml_result = $this->postXmlCurl($xmlData,'https://api.mch.weixin.qq.com/pay/unifiedorder',60);
// var_dump($xml_result,$xmlData);die;
$array = $this->xmlToArray($xml_result);
if($array['return_code'] == 'SUCCESS' && $array['result_code'] == 'SUCCESS'){
$time = time();
$key=C('WX_KEY');
$tmp = [];//临时数组用于签名
$tmp['appId'] = ' ';
$tmp['nonceStr'] = $array['nonce_str'];
$tmp['package'] = 'prepay_id='.$array['prepay_id'];
$tmp['signType'] = 'MD5';
$tmp['timeStamp'] = (string)$time;
$result['nonceStr'] = $array['nonce_str'];//随机字符串
$result['signType'] = 'MD5';//签名算法，暂支持 MD5
$result['package'] = 'prepay_id='.$array['prepay_id'];//统一下单接口返回的 prepay_id 参数值，提交格式如：prepay_id=*
$result['paySign'] = $this->getSign($tmp);
$result['timeStamp'] =(string)$time;
$result['appId'] = $array['appid'];
}else{
$result['return_code'] = $array['return_code'];
$result['return_msg'] = $array['return_msg'];
}
echo json_encode($result,JSON_UNESCAPED_UNICODE);
}
//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
}
/*
* 对要发送到微信统一下单接口的数据进行签名
*/
protected function getSign($Obj){
foreach ($Obj as $k => $v){
$param[$k] = $v;
}
//签名步骤一：按字典序排序参数
ksort($param);
$String = $this->formatBizQueryParaMap($param, false);
//签名步骤二：在string后加入KEY
$wx_key=C('WX_KEY'); //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
$String = $String."&key=".$wx_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);
// var_dump($result_);
return $result_;
}
/*
*排序并格式化参数方法，签名时需要使用
*/
protected function formatBizQueryParaMap($paraMap, $urlencode){
$buff = "";
ksort($paraMap);
foreach ($paraMap as $k => $v){
if($urlencode){
$v = urlencode($v);
}
//$buff .= strtolower($k) . "=" . $v . "&";
$buff .= $k . "=" . $v . "&";
}
$reqPar = "";
if (strlen($buff) > 0){
$reqPar = substr($buff, 0, strlen($buff)-1);
}
return $reqPar;
}
/*
* 生成随机字符串方法
*/
protected function createNoncestr($length = 32 ){
$chars = "abcdefghijklmnopqrstuvwxyz0123456789";
$str ="";
for ( $i = 0; $i < $length; $i++ ) {
$str.= substr($chars, mt_rand(0, strlen($chars)-1), 1);
}
return $str;
}
//数组转字符串方法
protected function arrayToXml($arr){
$xml = "<xml>";
foreach ($arr as $key=>$val)
{
if (is_numeric($val)){
$xml.="<".$key.">".$val."</".$key.">";
}else{
$xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
}
}
$xml.="</xml>";
return $xml;
}
//将xml字符串转换为数组
protected static function xmlToArray($xml){
$array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
return $array_data;
}
//发送xml请求方法
private static function postXmlCurl($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");
}
}
