前言：網上都是~ 呵呵 自己搞 只要花時間 多問客服總會有的

只說程序不說準備工作 自己ID 或者秘鑰都準備好了 寫的有點兒亂 可以把所有的方法 放在一個文件中調用

 public function wechat ($doorder,$doczmoney,$doczbody) {
        // H5 微信支付
        $wxUrl = "https://api.mch.weixin.qq.com/pay/unifiedorder"; //下單接口
        $appid = ""; //公眾賬號ID
        $mch_id ="";// 商戶號
        $nonce_str =$this->randStrpay(); //隨機字符串
        $key ="";
        $body = $doczbody; //商品描述
        $out_trade_no = $doorder;// 商戶訂單號
        $total_fee = $doczmoney*100;// 我數據庫存的是元 轉換下 標價金額 f分
        $device_info = ‘‘;        

        $spbill_create_ip = $this->getClientp();// 終端IP
        $notify_url ="";// 通知地址
        $trade_type ="MWEB";// 交易類型
        //組合數組 方便字典升序
        $paraMap = array(‘appid‘=>$appid,
            ‘mch_id‘=>$mch_id,
            ‘nonce_str‘=>$nonce_str,
            ‘body‘=>$body,
            ‘out_trade_no‘=>$out_trade_no,
            ‘total_fee‘=>$total_fee,
            ‘spbill_create_ip‘=>$spbill_create_ip,
            ‘notify_url‘=>$notify_url,
            ‘trade_type‘=>$trade_type,
            ‘device_info‘=>$device_info
        );
        // 字典升序 下邊有方法 這是摘出來的 自己復制到自己的位置 然後調用 下邊幾個調用都一樣
        $singStr = \Ruifi\Service\CommonService::formatParaMap($paraMap);

            //獲取singvalue值
        $sign =$this->autostr($singStr,$key);
        // sign 值添加到數組
        $mapSing = array_merge($paraMap,array(‘sign‘=>$sign));
        //print_r($mapSing);die;
        //數組轉xml
        $arrXml = \Ruifi\Service\CommonService::arrayToXml($mapSing);       
        //post 發送
        $wechatreslut = \Ruifi\Service\CommonService::postXmlCurl($arrXml,$wxUrl);
        //接受xml
        $xmlToarr = \Ruifi\Service\CommonService::xmlToArray($wechatreslut);
        $xmlToarrStr = \Ruifi\Service\CommonService::utf8_to_gbk_arr($xmlToarr);       
        if ($xmlToarrStr[‘result_code‘] ==‘SUCCESS‘){
            $wxMurl = $xmlToarrStr[‘mweb_url‘];
            header("Location: $wxMurl");
         
        }
    }
    //32位隨機字符串
    function randStrpay($length=32) {
        $rand=‘‘;
        $randstr= ‘ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789‘;
        $max = strlen($randstr)-1;
        mt_srand((double)microtime()*1000000);
        for($i=0;$i<$length;$i++) {
            $rand.=$randstr[mt_rand(0,$max)];
        }
        return $rand;
    }
    // 簽名算法
    function autostr($singStr,$key){
        $stringSignTemp = $singStr."&key=$key";
        $sign = md5($stringSignTemp);
        $signValue = strtoupper($sign);
        return $signValue;
}
//獲取IP
    function getClientp(){
        $cip ="unknow";
        if($_SERVER[‘REMOTE_ADDR‘]){
            $cip = $_SERVER[‘REMOTE_ADDR‘];
        }elseif(getenv("REMOTE_ADDR")){
            $cip =getenv("REMOTE_ADDR");
        }
        return $cip;
    }

這些方法是 上邊調用的 你自己隨意
 /*  字典升序*/
    function formatParaMap($paraMap)
    {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v)
        {
            $buff .= $k . "=" . $v . "&";
        }
        $reqPar = ‘‘;
        if (strlen($buff) > 0)
        {
            $reqPar = substr($buff, 0, strlen($buff)-1);
        }
        return $reqPar;
    }

/*  數組轉xml */
    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 $xml;
    }
public function postXmlCurl($xml,$url,$second=30)
    {
        //初始化curl
        $ch = curl_init();
        curl_setopt($ch, CURLOP_TIMEOUT, $second);
        curl_setopt($ch,CURLOPT_URL, $url);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        //運行curl
        $data = curl_exec($ch);
        curl_close($ch);
        //返回結果
        if($data)
        {
            curl_close($ch);
            return $data;
        }
        else
        {
            $error = curl_errno($ch);
            echo "curl出錯，錯誤碼:$error"."<br>";
            curl_close($ch);
            return false;
        }
    }
 /*  xml 轉數組 */
    public function xmlToArray($xml)
    {
        //將XML轉為array
        $array_data = json_decode(json_encode(simplexml_load_string($xml, ‘SimpleXMLElement‘, LIBXML_NOCDATA)), true);
        return $array_data;
    }

微信H5支付開發全過程（除內置微信以外的瀏覽器）