網上的很多PHP微信掃碼支付接入教程都頗為復雜，且需要配置和引入較多的文件，本人通過整理后給出一個單文件版的，只有200行代碼，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鑒意義。
?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核后郵件發送
$appid = 'xxxxx'; //公眾號APPID 通過微信支付商戶資料審核后郵件發送
$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
$wxPay = new WxpayService($mchid,$appid,$apiKey);
$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/'; //付款成功后的回調地址(不要有問號)
$payTime = time(); //付款時間
$arr = $wxPay->createJsBizPackage($payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);
//生成二維碼
$url = 'http://qr.liantu.com/api.php?text='.$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;
}
}
