支付接口对接技术做多了以后你会发现，基本上所有的第三方第四方支付接口的基本方法流程就是这样，至于有些签名方式不一样，配制参数不一样等等按照其提供的技术文档要求修改一下即可，有不懂的可以联系。
//配制类，填写在支付平台获取的相关信息class Constant {const USER= "QQ4770851";const MERCHNO = "ff8080816586cbd434358a66b0bc1525";const CREATE_URL = "/order/create";const QUERY_URL = "/order/query";const KEY = "C66604323DFA42B4864299246E04FD1B";}//签名类，按照支付平台的规则对参数进行签名class SignUtils {/** = */const QSTRING_EQUAL = "=";/** & */const QSTRING_SPLIT = "&";public static function signMD5($param, $merKey = '') {ksort($param);$arr = [];foreach ($param as $key => $value) {$arr[] = $key . self::QSTRING_EQUAL . $value;}$str = implode(self::QSTRING_SPLIT, $arr);return strtoupper(md5($str . self::QSTRING_SPLIT . $merKey));}}//请求类，发起支付请求class HttpUtils {/*** [post description]* @param [type] $url [description]* @param array $post [description]* @return [type] [description]*/public static function post($url, $post = []) {$headers = [ "Content-type: application/json;charset='utf-8'", "Accept: application/json", "Cache-Control: no-cache", "Pragma: no-cache" ];$ch = curl_init($url);curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);curl_setopt($ch, CURLOPT_TIMEOUT, 60);curl_setopt($ch, CURLOPT_POST, TRUE);curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($post));curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);$data = curl_exec($ch);//CURLOPT_RETURNTRANSFER 不设置 curl_exec返回TRUE 设置 curl_exec返回json(此处) 失败都返回FALSEcurl_close($ch);return $data;}}// 支付正文开始，配制参数，发起请求$param = [];$param['merchno'] = Constant::MERCHNO;$param['out_trade_no'] = $_POST['rechargeId'];$param['subject'] = $_POST['username'];$param['total_amount'] = $_POST['amount'];$param['redirect_url'] = 'http://'.$_SERVER['HTTP_HOST'].'/return.php';$param['notify_url'] = 'http://'.$_SERVER['HTTP_HOST'].'/notify.php';$param['sign'] = SignUtils::signMD5($param, Constant::KEY);$response = HttpUtils::post(Constant::CREATE_URL, $param);$arr = json_decode($response,TRUE);header("location:".$arr['pay_url']);
