PHP微信扫码支付接入也不是很复杂，前期需要先配置与引入文件，这里首先先分两步和大家讲解一下
生成二维码扫码图片，这里需要配置商户ID，appid和秘钥，再调用wxpay类，生成二维码
header(Content-type:text/html; Charset=utf-8);
$mchid = xxxxx; //微信支付商户号 PartnerID 通过微信支付商户资料审核后邮件发送
$appid = xxxxx; //公众号APPID 通过微信支付商户资料审核后邮件发送
$apiKey = xxxxx; //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥
$wxPay = new WxpayService($mchid,$appid,$apiKey);
$outTradeNo = uniqid(); //你自己的商品订单号
$payAmount = 0.01; //付款金额，单位:元
$orderName = 支付测试; //订单标题
$notifyUrl = https://www.xxx.com/wx/; //付款成功后的回调地址(不要有问号)
$payTime = time(); //付款时间
$arr = $wxPay->createJsBizPackage($payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);
//生成二维码
$url = http://qr.liantu.com/api.php?text=.$arr[code_url];
echo "<img src={$url} style=width:300px;>";
以下是wxpay类，和回调函数都整合在一起了，notify方法是回调地址调用的方法，比如：http://www.xxx.com/wx/notify.php，付款成功后，微信服务器会将付款结果通知到该页面。
class WxpayService
{
protected $mchid;
protected $appid;
protected $apiKey;
public function __construct($mchid, $appid, $key)
{
$this->mchid = $mchid;
$this->appid = $appid;
$this->apiKey = $key;
}
/**
* 发起订单
* @param float $totalFee 收款总费用 单位元
* @param string $outTradeNo 唯一的订单号
* @param string $orderName 订单名称
* @param string $notifyUrl 支付结果通知url 不要有问号
* @param string $timestamp 订单发起时间
* @return array
*/
public function createJsBizPackage($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, //商家数据包，原样返回，如果填写中文，请注意转换为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), //单位 转为分
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, $options);
}
//https请求 不验证证书和host
curl_setopt($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); //设置cURL允许执行的最长秒数
if (!empty($options)) {
curl_setopt_array($ch, $options);
}
//https请求 不验证证书和host
curl_setopt($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 $xml;
}
/**
* 获取签名
*/
public static function getSign($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;
}
}
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