掃碼支付已經成為交易的一種流行方式，本文361源碼主要和大家分享實現微信掃碼支付php代碼，希望能幫助到大家。主要分為2個部分，一是支付，另外一個就是回調。

一、需要用微信掃碼付款 

支付文件pay.php

<?phpinclude("../../../config/conn.php");//數據庫//sql先插入訂單到數據庫//讀取訂單號//$ddbh="測試訂單號";///直接訪問本頁面測試ini_set('date.timezone','Asia/Shanghai');$mchid = '149651642';          //微信支付商戶$appid = 'wxc35486954de04f5';  //公眾號APPID $apiKey = '6ac2b9ef5a7c1190';//設置API密鑰$wxPay = new WxpayService($mchid,$appid,$apiKey);$outTradeNo = $ddbh;     //你商城的商品訂單號$payAmount = 1;          //金額，單位:元$orderName = 'wxpay';    //訂單標題$notifyUrl = weburl."notify.php";     //付款成功后的回調地址(不要有問號),可直接放根目錄$payTime = time();$arr = $wxPay->createJsBizPackage($payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);//生成二維碼$url2 = $arr['code_url'];//echo "<img src='{$url}' style='width:300px;'>";class WxpayService{    protected $mchid;    protected $appid;    protected $apiKey;    public function __construct($mchid, $appid, $key)    {        $this->mchid = $mchid;        $this->appid = $appid;        $this->apiKey = $key;    }    /**     * 發起訂單     * @param float $totalFee 收款總費用 單位元     * @param string $outTradeNo 唯一的訂單號     * @param string $orderName 訂單名稱     * @param string $notifyUrl 支付結果通知url 不要有問號     * @param string $timestamp 訂單發起時間     * @return array     */    public function createJsBizPackage($totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp)    {        $config = array(            'mch_id' => $this->mchid,            'appid' => $this->appid,            'key' => $this->apiKey,        );        //$orderName = iconv('GBK','UTF-8',$orderName);        $unified = array(            'appid' => $config['appid'],            'attach' => 'pay',             //商家數據包，原樣返回，如果填寫中文，請注意轉換為utf-8            'body' => $orderName,            'mch_id' => $config['mch_id'],            'nonce_str' => self::createNonceStr(),            'notify_url' => $notifyUrl,            'out_trade_no' => $outTradeNo,            'spbill_create_ip' => '127.0.0.1',            'total_fee' => intval($totalFee * 100),       //單位 轉為分            'trade_type' => 'NATIVE',        );        $unified['sign'] = self::getSign($unified, $config['key']);        $responseXml = self::curlPost('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arrayToXml($unified));        $unifiedOrder = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);        if ($unifiedOrder === false) {            die('parse xml error');        }        if ($unifiedOrder->return_code != 'SUCCESS') {            die($unifiedOrder->return_msg);        }        if ($unifiedOrder->result_code != 'SUCCESS') {            die($unifiedOrder->err_code);        }        $codeUrl = (array)($unifiedOrder->code_url);        if(!$codeUrl[0]) exit('get code_url error');        $arr = array(            "appId" => $config['appid'],            "timeStamp" => $timestamp,            "nonceStr" => self::createNonceStr(),            "package" => "prepay_id=" . $unifiedOrder->prepay_id,            "signType" => 'MD5',            "code_url" => $codeUrl[0],        );        $arr['paySign'] = self::getSign($arr, $config['key']);        return $arr;    }    public function notify()    {        $config = array(            'mch_id' => $this->mchid,            'appid' => $this->appid,            'key' => $this->apiKey,        );        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];        $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);        if ($postObj === false) {            die('parse xml error');        }        if ($postObj->return_code != 'SUCCESS') {            die($postObj->return_msg);        }        if ($postObj->result_code != 'SUCCESS') {            die($postObj->err_code);        }        $arr = (array)$postObj;        unset($arr['sign']);        if (self::getSign($arr, $config['key']) == $postObj->sign) {            echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';            return $postObj;        }    }    /**     * curl get     *     * @param string $url     * @param array $options     * @return mixed     */    public static function curlGet($url = '', $options = array())    {        $ch = curl_init($url);        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);        curl_setopt($ch, CURLOPT_TIMEOUT, 30);        if (!empty($options)) {            curl_setopt_array($ch, $options);        }        //https請求 不驗證證書和host        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);        $data = curl_exec($ch);        curl_close($ch);        return $data;    }    public static function curlPost($url = '', $postData = '', $options = array())    {        if (is_array($postData)) {            $postData = http_build_query($postData);        }        $ch = curl_init();        curl_setopt($ch, CURLOPT_URL, $url);        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);        curl_setopt($ch, CURLOPT_POST, 1);        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);        curl_setopt($ch, CURLOPT_TIMEOUT, 30); //設置cURL允許執行的最長秒數        if (!empty($options)) {            curl_setopt_array($ch, $options);        }        //https請求 不驗證證書和host        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);        $data = curl_exec($ch);        curl_close($ch);        return $data;    }    public static function createNonceStr($length = 16)    {        $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';        $str = '';        for ($i = 0; $i < $length; $i++) {            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);        }        return $str;    }    public static function arrayToXml($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 $xml;    }    /**     * 獲取簽名     */    public static function getSign($params, $key)    {        ksort($params, SORT_STRING);        $unSignParaString = self::formatQueryParaMap($params, false);        $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));        return $signStr;    }    protected static function formatQueryParaMap($paraMap, $urlEncode = false)    {        $buff = "";        ksort($paraMap);        foreach ($paraMap as $k => $v) {            if (null != $v && "null" != $v) {                if ($urlEncode) {                    $v = urlencode($v);                }                $buff .= $k . "=" . $v . "&";            }        }        $reqPar = '';        if (strlen($buff) > 0) {            $reqPar = substr($buff, 0, strlen($buff) - 1);        }        return $reqPar;    }}?><html><head><meta http-equiv="content-type" content="text/html;charset=utf-8"/><meta name="viewport" content="width=device-width, initial-scale=1" /> <title><?=$g_webname?>微信支付</title><input type="hidden" id="wpay" value="<?php echo  $url2; ?>"/></head><body><img style="float:left;clear:both;margin:0 0 0 7px;" src="<?=weburl?>tem/getqr.php?u=<?=urlencode($url2)?>&size=9"/></body></html>

二、回調文件notify.php

<?phpinclude("../../../config/conn.php"); ini_set('date.timezone','Asia/Shanghai');error_reporting(0);$mchid = '149651542';          //微信支付商戶號$appid = 'wxc35486954de04f5';  //公眾號APPID$apiKey = '6ac2b9e5';   //API密鑰$wxPay = new WxpayService($mchid,$appid,$apiKey);$result = $wxPay->notify();//file_put_contents('2.txt',json_encode($result));//測試結果//$result['transaction_id']為微信交易號 if($result){    if(array_key_exists("return_code", $result)&& array_key_exists("result_code", $result)&& $result["return_code"] == "SUCCESS"&& $result["result_code"] == "SUCCESS"){    //file_put_contents('1.txt',1);$sj=date("Y-m-d H:i:s");$uip=$_SERVER["REMOTE_ADDR"];$sql="select * from yjcode_dingdang where bh='".$result['out_trade_no']."' and ifok=0";mysql_query("SET NAMES 'GBK'");$res=mysql_query($sql);if($row=mysql_fetch_array($res)){ updatetable("yjcode_dingdang","sj='".$sj."',uip='".$uip."',alipayzt='TRADE_SUCCESS',ddzt='交易成功',ifok=1 ,wxddbh=".$result['transaction_id']." where id=".$row[id]); $money1=$row['money1']; PointIntoM($row['userid'],"微信充值".$money1."元",$money1); PointUpdateM($row[userid],$money1);}            return true;        }  }else{    echo 'pay error';}class WxpayService{    protected $mchid;    protected $appid;    protected $apiKey;    public function __construct($mchid, $appid, $key)    {        $this->mchid = $mchid;        $this->appid = $appid;        $this->apiKey = $key;    }    public function notify()    {        $config = array(            'mch_id' => $this->mchid,            'appid' => $this->appid,            'key' => $this->apiKey,        );        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];        $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);        if ($postObj === false) {            die('parse xml error');        }        if ($postObj->return_code != 'SUCCESS') {            die($postObj->return_msg);        }        if ($postObj->result_code != 'SUCCESS') {            die($postObj->err_code);        }        $arr = (array)$postObj;        unset($arr['sign']);        if (self::getSign($arr, $config['key']) == $postObj->sign) {            echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';            return $arr;        }    }    /**     * 獲取簽名     */    public static function getSign($params, $key)    {        ksort($params, SORT_STRING);        $unSignParaString = self::formatQueryParaMap($params, false);        $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));        return $signStr;    }    protected static function formatQueryParaMap($paraMap, $urlEncode = false)    {        $buff = "";        ksort($paraMap);        foreach ($paraMap as $k => $v) {            if (null != $v && "null" != $v) {                if ($urlEncode) {                    $v = urlencode($v);                }                $buff .= $k . "=" . $v . "&";            }        }        $reqPar = '';        if (strlen($buff) > 0) {            $reqPar = substr($buff, 0, strlen($buff) - 1);        }        return $reqPar;    }}

OK，完畢。