关于微信支付小程序v3【附PHP完整后端代码】

关于微信支付小程序v3【附PHP完整后端代码】
关于微信支付小程序v3的介绍【附PHP完整后端代码】，踩坑太多，不多说，直接上完整后端代码。

微信支付 小程序 （v3）- php 完整后端代码

踩坑太多，不多说，直接上完整后端代码<?phpheader(&#39;Content-type:text/html; Charset=utf-8&#39;);ini_set(&#39;date.timezone&#39;,&#39;Asia/Shanghai&#39;);$data_s = file_get_contents(&#39;php://input&#39;);$data_s = json_decode($data_s,true);//统一下单function wechartAddOrder($name,$ordernumber,$money,$openid,$timeStamp,$noncestr){ $url = "https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi"; $urlarr = parse_url($url); $appid = &#39;小程序APPID&#39;;//appID $mchid = &#39;微信支付商户ID&#39;;//商户ID $xlid = &#39;微信支付公钥序列号&#39;;//秘钥序列号 可在这个网址中查询 https://myssl.com/cert_decode.html $data = array(); $time = $timeStamp; $data[&#39;appid&#39;] = $appid; $data[&#39;mchid&#39;] = $mchid; $data[&#39;description&#39;] = $name;//商品描述 $data[&#39;out_trade_no&#39;] = $ordernumber;//订单编号 $data[&#39;notify_url&#39;] = "你的域名/你的支付目录路径/notify.php";//回调接口 需根据自己的情况修改 $data[&#39;amount&#39;][&#39;total&#39;] = intval($money * 1);//金额 单位 分 $data[&#39;payer&#39;][&#39;openid&#39;] = $openid;//用户openID $data = json_encode($data); $key = getSign($data,$urlarr[&#39;path&#39;],$noncestr,$time);//签名 $token = sprintf(&#39;mchid="%s",serial_no="%s",nonce_str="%s",timestamp="%d",signature="%s"&#39;,$mchid,$xlid,$noncestr,$time,$key);//头部信息 $header = array( &#39;Content-Type:&#39;.&#39;application/json; charset=UTF-8&#39;, &#39;Accept:application/json&#39;, &#39;User-Agent:*/*&#39;, &#39;Authorization: WECHATPAY2-SHA256-RSA2048 &#39;.$token ); $ret = curl_post_https($url,$data,$header); $ret = ltrim($ret,&#39;{"prepay_id":"&#39;); $ret = rtrim($ret,&#39;}"&#39;); //微信支付（小程序）签名 $str = getWechartSign($appid,$timeStamp,$noncestr,&#39;prepay_id=&#39;.$ret); $arr = array(&#39;appid&#39;=>$appid,&#39;timestamp&#39;=>$timeStamp,&#39;package&#39;=>&#39;prepay_id=&#39;.$ret,&#39;paySign&#39;=>$str); exit(json_encode($arr));}$set_body = &#39;支付测试&#39;;//支付显示内容$price = &#39;1&#39;;//支付金额$out_trade_no = $data_s[&#39;out_trade_no&#39;];//订单号$timeStamp = $data_s[&#39;timeStamp&#39;];//时间戳$openid = $data_s[&#39;openid&#39;];$noncestr = $data_s[&#39;nonceStr&#39;];wechartAddOrder($set_body,$out_trade_no,$price,$openid,$timeStamp,$noncestr);//微信支付签名function getSign($data=array(),$url,$randstr,$time){ $str = "POST"."\n".$url."\n".$time."\n".$randstr."\n".$data."\n"; $key = file_get_contents(&#39;apiclient_key.pem&#39;);//在商户平台下载的秘钥 $str = getSha256WithRSA($str,$key); return $str;}//调起支付的签名function getWechartSign($appid,$timeStamp,$noncestr,$prepay_id){ $str = $appid."\n".$timeStamp."\n".$noncestr."\n".$prepay_id."\n"; $key = file_get_contents(&#39;apiclient_key.pem&#39;); $str = getSha256WithRSA($str,$key); return $str;}function getSha256WithRSA($content, $privateKey){ $binary_signature = ""; $algo = "SHA256"; openssl_sign($content, $binary_signature, $privateKey, $algo); $sign = base64_encode($binary_signature); return $sign;}/* PHP CURL HTTPS POST */function curl_post_https($url,$data,$header){ // 模拟提交数据函数 $curl = curl_init(); // 启动一个CURL会话 curl_setopt($curl, CURLOPT_URL, $url); // 要访问的地址 curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0); // 对认证证书来源的检查 curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 1); // 从证书中检查SSL加密算法是否存在 curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER[&#39;HTTP_USER_AGENT&#39;]); // 模拟用户使用的浏览器 curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1); // 使用自动跳转 curl_setopt($curl, CURLOPT_AUTOREFERER, 1); // 自动设置Referer curl_setopt($curl, CURLOPT_POST, 1); // 发送一个常规的Post请求 curl_setopt($curl, CURLOPT_POSTFIELDS, $data); // Post提交的数据包 curl_setopt($curl, CURLOPT_TIMEOUT, 30); // 设置超时限制防止死循环 curl_setopt($curl, CURLOPT_HEADER, 0); // 显示返回的Header区域内容 curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); // 获取的信息以文件流的形式返回 curl_setopt($curl, CURLOPT_HTTPHEADER, $header); $tmpInfo = curl_exec($curl); // 执行操作 if (curl_errno($curl)) { echo &#39;Errno&#39;.curl_error($curl);//捕抓异常 } curl_close($curl); // 关闭CURL会话 return $tmpInfo; // 返回数据，json格式}