網上的很多PHP微信掃碼支付接入教程都頗爲複雜，且需要配置和引入較多的文件，本人通過整理後給出一個單文件版的，希望可以給各位想接入微信掃碼支付的帶來些許幫助和借鑑意義。
將該文件放到你的授權目錄下，並在微信裏訪問這個文件，即可看到演示效果。效果如下：
需要注意的事項：
1.該文件需放到支付授權目錄下，可以在微信支付商戶平臺->產品中心->開發配置中設置。
2.如提示簽名錯誤可以通過微信支付簽名驗證工具進行驗證：https://pay.weixin.qq.com/wiki/tools/signverify/
代碼如下：
<?php
header('Content-type:text/html; Charset=utf-8');
$mchid = 'xxxxx'; //微信支付商戶號 PartnerID 通過微信支付商戶資料審覈後郵件發送
$appid = 'xxxxx'; //微信支付申請對應的公衆號的APPID
$appKey = 'xxxxx'; //微信支付申請對應的公衆號的APP Key
$apiKey = 'xxxxx'; //https://pay.weixin.qq.com 帳戶設置-安全設置-API安全-API密鑰-設置API密鑰
//①、獲取用戶openid
$wxPay = new WxpayService($mchid,$appid,$appKey,$apiKey);
$openId = $wxPay->GetOpenid(); //獲取openid
if(!$openId) exit('獲取openid失敗');
//②、統一下單
$outTradeNo = uniqid(); //你自己的商品訂單號
$payAmount = 0.01; //付款金額，單位:元
$orderName = '支付測試'; //訂單標題
$notifyUrl = 'https://www.xxx.com/wx/'; //付款成功後的回調地址(不要有問號)
$payTime = time(); //付款時間
$jsApiParameters = $wxPay->createJsBizPackage($openId,$payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);
$jsApiParameters = json_encode($jsApiParameters);
?>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>微信支付樣例-支付</title>
<script type="text/javascript">
//調用微信JS api 支付
function jsApiCall()
{
WeixinJSBridge.invoke(
'getBrandWCPayRequest',
<?php echo $jsApiParameters; ?>,
function(res){
WeixinJSBridge.log(res.err_msg);
alert(res.err_code+res.err_desc+res.err_msg);
}
);
}
function callpay()
{
if (typeof WeixinJSBridge == "undefined"){
if( document.addEventListener ){
document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
}else if (document.attachEvent){
document.attachEvent('WeixinJSBridgeReady', jsApiCall);
document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
}
}else{
jsApiCall();
}
}
</script>
</head>
<body>
<br/>
<font color="#9ACD32"><b>該筆訂單支付金額爲<span style="color:#f00;font-size:50px"><?php echo $payAmount?>元</span>錢</b></font><br/><br/>
<div align="center">
<button style="width:210px; height:50px; border-radius: 15px;background-color:#FE6714; border:0px #FE6714 solid; cursor: pointer; color:white; font-size:16px;" type="button" onclick="callpay()" >立即支付</button>
</div>
</body>
</html>
<?php
class WxpayService
{
protected $mchid;
protected $appid;
protected $appKey;
protected $apiKey;
public $data = null;
public function __construct($mchid, $appid, $appKey,$key)
{
$this->mchid = $mchid; //https://pay.weixin.qq.com 產品中心-開發配置-商戶號
$this->appid = $appid; //微信支付申請對應的公衆號的APPID
$this->appKey = $appKey; //微信支付申請對應的公衆號的APP Key
$this->apiKey = $key; //https://pay.weixin.qq.com 帳戶設置-安全設置-API安全-API密鑰-設置API密鑰
}
/**
* 通過跳轉獲取用戶的openid，跳轉流程如下：
* 1、設置自己需要調回的url及其其他參數，跳轉到微信服務器https://open.weixin.qq.com/connect/oauth2/authorize
* 2、微信服務處理完成之後會跳轉回用戶redirect_uri地址，此時會帶上一些參數，如：code
* @return 用戶的openid
*/
public function GetOpenid()
{
//通過code獲得openid
if (!isset($_GET['code'])){
//觸發微信返回code碼
$scheme = $_SERVER['HTTPS']=='on' ? 'https://' : 'http://';
$baseUrl = urlencode($scheme.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].$_SERVER['QUERY_STRING']);
$url = $this->__CreateOauthUrlForCode($baseUrl);
Header("Location: $url");
exit();
} else {
//獲取code碼，以獲取openid
$code = $_GET['code'];
$openid = $this->getOpenidFromMp($code);
return $openid;
}
}
/**
* 通過code從工作平臺獲取openid機器access_token
* @param string $code 微信跳轉回來帶上的code
* @return openid
*/
public function GetOpenidFromMp($code)
{
$url = $this->__CreateOauthUrlForOpenid($code);
$res = self::curlGet($url);
//取出openid
$data = json_decode($res,true);
$this->data = $data;
$openid = $data['openid'];
return $openid;
}
/**
* 構造獲取open和access_toke的url地址
* @param string $code，微信跳轉帶回的code
* @return 請求的url
*/
private function __CreateOauthUrlForOpenid($code)
{
$urlObj["appid"] = $this->appid;
$urlObj["secret"] = $this->appKey;
$urlObj["code"] = $code;
$urlObj["grant_type"] = "authorization_code";
$bizString = $this->ToUrlParams($urlObj);
return "https://api.weixin.qq.com/sns/oauth2/access_token?".$bizString;
}
/**
* 構造獲取code的url連接
* @param string $redirectUrl 微信服務器回跳的url，需要url編碼
* @return 返回構造好的url
*/
private function __CreateOauthUrlForCode($redirectUrl)
{
$urlObj["appid"] = $this->appid;
$urlObj["redirect_uri"] = "$redirectUrl";
$urlObj["response_type"] = "code";
$urlObj["scope"] = "snsapi_base";
$urlObj["state"] = "STATE"."#wechat_redirect";
$bizString = $this->ToUrlParams($urlObj);
return "https://open.weixin.qq.com/connect/oauth2/authorize?".$bizString;
}
/**
* 拼接簽名字符串
* @param array $urlObj
* @return 返回已經拼接好的字符串
*/
private function ToUrlParams($urlObj)
{
$buff = "";
foreach ($urlObj as $k => $v)
{
if($k != "sign") $buff .= $k . "=" . $v . "&";
}
$buff = trim($buff, "&");
return $buff;
}
/**
* 統一下單
* @param string $openid 調用【網頁授權獲取用戶信息】接口獲取到用戶在該公衆號下的Openid
* @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 $timestamp 支付時間
* @return string
*/
public function createJsBizPackage($openid, $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，請注意轉換爲utf-8
'body' => $orderName,
'mch_id' => $config['mch_id'],
'nonce_str' => self::createNonceStr(),
'notify_url' => $notifyUrl,
'openid' => $openid, //rade_type=JSAPI，此參數必傳
'out_trade_no' => $outTradeNo,
'spbill_create_ip' => '127.0.0.1',
'total_fee' => intval($totalFee * 100), //單位 轉爲分
'trade_type' => 'JSAPI',
);
$unified['sign'] = self::getSign($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);
}
$arr = array(
"appId" => $config['appid'],
"timeStamp" => "$timestamp", //這裏是字符串的時間戳，不是int，所以需加引號
"nonceStr" => self::createNonceStr(),
"package" => "prepay_id=" . $unifiedOrder->prepay_id,
"signType" => 'MD5',
);
$arr['paySign'] = self::getSign($arr, $config['key']);
return $arr;
}
public static function curlGet($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 . ">";
}
$xml .= "</xml>";
file_put_contents('1.txt',$xml);
return $xml;
}
public static function getSign($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;
}
}
?>github下載地址：https://github.com/dedemao/weixinPay